The diagram shows a sequence of eight moon positions as it orbits the Earth. When viewed from Earth, which moon position corresponds to the new moon phase? [7L-1]
The diagram shows a sequence of eight moon positions as it orbits the Earth. When viewed from Earth, which moon position corresponds to the waxing crescent phase? [7L-2]
The diagram shows a sequence of eight moon positions as it orbits the Earth. When viewed from Earth, which moon position corresponds to the first quarter phase? [7L-3]
The diagram shows a sequence of eight moon positions as it orbits the Earth. When viewed from Earth, which moon position corresponds to the waxing gibbous phase? [7L-4]
The diagram shows a sequence of eight moon positions as it orbits the Earth. When viewed from Earth, which moon position corresponds to the full moon phase? [7L-5]
The diagram shows a sequence of eight moon positions as it orbits the Earth. When viewed from Earth, which moon position corresponds to the waning gibbous phase? [7L-6]
The diagram shows a sequence of eight moon positions as it orbits the Earth. When viewed from Earth, which moon position corresponds to the last quarter phase? [7L-7]
The diagram shows a sequence of eight moon positions as it orbits the Earth. When viewed from Earth, which moon position corresponds to the waning crescent phase? [7L-8]
Which matches the time it takes for the Earth to orbit the Sun once? [7L-9]
Which matches the time it takes for the Moon to orbit the Earth once? [7L-10]
Which matches the time it takes for the Earth to spin round once on its axis? [7L-11]
Which matches the length of daylight on the equator? [7L-12]
Which matches the time it takes for the Earth to orbit the Sun once? [7L-13]
Which matches the approximate time it takes for the Moon to orbit the Earth once? [7L-14]
Which matches the time it takes for the Earth to spin round once on its axis? [7L-15]
Which matches the length of night-time on the equator? [7L-16]
Which planet is nearest the Sun? [7L-17]
Which planet is the 2nd in order from the Sun? [7L-18]
Which planet is the 3rd in order from the Sun? [7L-19]
Which planet is the 4th in order from the Sun? [7L-20]
Which planet is the 5th in order from the Sun? [7L-21]
Which planet is the 6th in order from the Sun? [7L-22]
Which planet is the 7th in order from the Sun? [7L-23]
Which planet is the 8th in order from the Sun? [7L-24]
Which planet is the farthest from the Sun? [7L-25]


Which position in the cycle corresponds to the Autumn season in the Northern Hemisphere? [7L-29]
Which position in the cycle corresponds to the Winter season in the Northern Hemisphere? [7L-30]
Which position in the cycle corresponds to the Spring season in the Northern Hemisphere? [7L-31]
Which position in the cycle corresponds to the Summer season in the Northern Hemisphere? [7L-32]
Which position in the cycle corresponds to the Spring season in the Southern Hemisphere? [7L-33]
Which position in the cycle corresponds to the Summer season in the Southern Hemisphere? [7L-34]
Which position in the cycle corresponds to the Autumn season in the Southern Hemisphere? [7L-35]
Which position in the cycle corresponds to the Winter season in the Southern Hemisphere? [7L-36]




Which explains why a planet has 'day' and 'night'? [7L-42]
Which explains why a planet has 'seasons'? [7L-43]
Which explains why Mars has 'seasons'? [7L-44]
Which explains why Earth has 'day' and 'night'? [7L-45]
Which is the path of an object moving around another in space? [7L-46]
Which is a rock moving around the Sun between the paths of Mars and Jupiter? [7L-47]
Which is a very large spinning object moving around a star? [7L-48]
Which is a recognisable pattern of stars? [7L-49]
Which is a mass of dust and ice going around the Sun? [7L-50]
Which explains why stars seem to move across the sky? [7L-52]
Which of the following is TRUE? [7L-53]
Which of the following is TRUE? [7L-54]
Which of the following is TRUE? [7L-55]
Which of the following is TRUE? [7L-56]
Which of the following is TRUE? [7L-57]
Which of the following is TRUE? [7L-58]
Which of the following is TRUE? [7L-59]
Which of the following is TRUE? [7L-60]
Which pattern is generally TRUE the further a planet is from the Sun? [7L-61]
Which pattern is generally TRUE the further a planet is from the Sun? [7L-62]
Which pattern is generally TRUE the further a planet is from the Sun? [7L-63]
Which pattern is generally TRUE the further a planet is from the Sun? [7L-64]
Starting with the Earth at position 2 in the cycle, where will the Earth be in 3 months time? [7L-65]
Starting with the Earth at position 2 in the cycle, where will the Earth be in 6 months time? [7L-66]
Starting with the Earth at position 2 in the cycle, where will the Earth be in 9 months time? [7L-67]
Starting with the Earth at position 2 in the cycle, where will the Earth be in 12 months time? [7L-68]
In which direction does the Sun rise? [7L-69]
In which direction does the Sun set? [7L-70]
In which direction is the Sun highest in the sky? [7L-71]
In which direction does a magnetic compass point? [7L-72]
At what time is the Sun highest in the sky?
Which of the following explains why the Sun seems to move across the sky? [7L-78]
From the point of view of plant growth, which is the best direction for a short narrow garden attached to a house to face? [7L-79]
Which object is the Sun? [7L-81]
Which object is a comet? [7L-82]
Which object could be the Earth? [7L-83]
Which object is our Moon? [7L-84]
Which object could be Mars? [7L-85]
Which object could be an asteroid? [7L-86]
Which object is a star? [7L-87]
Which object is a moon of a planet? [7L-88]
The __(1)__ is seen by __(2)__ sunlight as it orbits the Earth. A lunar __(3)__ happens when the __(4)__ is directly between the Sun and the Moon. The Earth blocks out light from the __(5)__ so the Moon goes __(6)__.
The __(1)__ is seen by __(2)__ sunlight as it orbits the Earth. A lunar __(3)__ happens when the __(4)__ is directly between the Sun and the Moon. The Earth blocks out light from the __(5)__ so the Moon goes __(6)__.
The __(1)__ is seen by __(2)__ sunlight as it orbits the Earth. A lunar __(3)__ happens when the __(4)__ is directly between the Sun and the Moon. The Earth blocks out light from the __(5)__ so the Moon goes __(6)__.
The __(1)__ is seen by __(2)__ sunlight as it orbits the Earth. A lunar __(3)__ happens when the __(4)__ is directly between the Sun and the Moon. The Earth blocks out light from the __(5)__ so the Moon goes __(6)__.
The __(1)__ is seen by __(2)__ sunlight as it orbits the Earth. A lunar __(3)__ happens when the __(4)__ is directly between the Sun and the Moon. The Earth blocks out light from the __(5)__ so the Moon goes __(6)__.
The __(1)__ is seen by __(2)__ sunlight as it orbits the Earth. A lunar __(3)__ happens when the __(4)__ is directly between the Sun and the Moon. The Earth blocks out light from the __(5)__ so the Moon goes __(6)__.
The Sun is a __(1)__ object because it makes and gives out its own __(2)__. A __(3)__ eclipse happens when the Moon is directly between the Earth and the __(4)__. The __(5)__ blocks out light from the Sun so the __(6)__ goes dark.
The Sun is a __(1)__ object because it makes and gives out its own __(2)__. A __(3)__ eclipse happens when the Moon is directly between the Earth and the __(4)__. The __(5)__ blocks out light from the Sun so the __(6)__ goes dark.
The Sun is a __(1)__ object because it makes and gives out its own __(2)__. A __(3)__ eclipse happens when the Moon is directly between the Earth and the __(4)__. The __(5)__ blocks out light from the Sun so the __(6)__ goes dark.
The Sun is a __(1)__ object because it makes and gives out its own __(2)__. A __(3)__ eclipse happens when the Moon is directly between the Earth and the __(4)__. The __(5)__ blocks out light from the Sun so the __(6)__ goes dark.
The Sun is a __(1)__ object because it makes and gives out its own __(2)__. A __(3)__ eclipse happens when the Moon is directly between the Earth and the __(4)__. The __(5)__ blocks out light from the Sun so the __(6)__ goes dark.
The Sun is a __(1)__ object because it makes and gives out its own __(2)__. A __(3)__ eclipse happens when the Moon is directly between the Earth and the __(4)__. The __(5)__ blocks out light from the Sun so the __(6)__ goes dark.













Which month corresponds to position 3 in the yearly cycle of the Earth? [7L-121]
Which month corresponds to position 4 in the yearly cycle of the Earth? [7L-122]
Which month corresponds to position 1 in the yearly cycle of the Earth? [7L-123]
Which month corresponds to position 2 in the yearly cycle of the Earth? [7L-124]
The diagram represents the Earth rotating as viewed from directly above the South Pole (S). Which point most likely corresponds to sunset at about 6pm? [7L-125]
The diagram represents the Earth rotating as viewed from directly above the South Pole (S). Which point most likely corresponds to about 9pm and stars could be readily observed? [7L-126]
The diagram represents the Earth rotating as viewed from directly above the South Pole (S). Which point most likely corresponds to 12 midnight? [7L-127]
The diagram represents the Earth rotating as viewed from directly above the South Pole (S). Which point most likely corresponds to about 3am and stars could be readily observed? [7L-128]
The diagram represents the Earth rotating as viewed from directly above the South Pole (S). Which point most likely corresponds to sunrise at about 6am? [7L-129]
The diagram represents the Earth rotating as viewed from directly above the South Pole (S). Which point most likely corresponds to daylight at about 9am? [7L-130]
The diagram represents the Earth rotating as viewed from directly above the South Pole (S). Which point most likely corresponds to 12 noon? [7L-131]
The diagram represents the Earth rotating as viewed from directly above the South Pole (S). Which point most likely corresponds to about 3pm in the afternoon? [7L-132]
Which word best matches the Sun? [7L-133]
Which word best matches a large object orbiting a planet? [7L-134]
Which word best matches a large object orbiting a star? [7L-135]
Which word best matches a sun and surrounding planets? [7L-136]
Which word best matches a large collection of stars? [7L-137]
Which word best matches a single object that naturally gives out light? [7L-138]
Which word best matches the Milky Way? [7L-139]
Which word best matches Pluto? [7L-140]
Which word best matches everything around? [7L-141]
Which word best matches sputnik 1 (the 1st)? [7L-142]
Which is generally TRUE the further a planet is from the Sun? [9j-18]
Which pattern is generally TRUE the further a planet is from the Sun? [9j-19]
Which pattern is generally TRUE the further a planet is from the Sun? [9j-20]
Which statement is FALSE about the force of gravitational attraction? [9J-25]
Which statement is FALSE about the force of gravitational attraction? [9J-26]
Artificial satellites are usful objects which can be put up in space to orbit the Earth. Which statement is TRUE about the use of artificial satellites? [9J-29]
Artificial satellites are usful objects which can be put up in space to orbit the Earth. Which statement is TRUE about the use of artificial satellites? [9J-30]
Artificial satellites are usful objects which can be put up in space to orbit the Earth. Which statement is TRUE about the use of artificial satellites? [9J-31]
Artificial satellites are usful objects which can be put up in space to orbit the Earth. Which statement is TRUE about the use of artificial satellites? [9J-32]
Scientists are always seeking information about our Solar system and beyond. Which statement is most likely to be FALSE about this situation? [9J-33]
Scientists are always seeking information about our Solar system and beyond. Which statement is most likely to be FALSE about this situation? [9J-34]
Scientists are always seeking information about our Solar system and beyond. Which statement is most likely to be FALSE about this situation? [9J-35]
Scientists are always seeking information about our Solar system and beyond. Which statement is most likely to be FALSE about this situation? [9J-36]
Artificial satellites are usful objects which can be put up in space to orbit the Earth. Which statement is FALSE? [9J-37]
Artificial satellites are usful objects which can be put up in space to orbit the Earth. Which statement is FALSE? [9J-37]
Artificial satellites are usful objects which can be put up in space to orbit the Earth. Which statement is FALSE? [9J-39]
Artificial satellites are usful objects which can be put up in space to orbit the Earth. Which statement is FALSE? [9J-40]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time, which object is most likely to hit the ground 2nd? [9J-41]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time, which object is most likely to hit the ground 4th? [9J-42]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time, which object is most likely to hit the ground 1st? [9J-43]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time, which object is most likely to hit the ground 3rd? [9J-44]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time,The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, and the experiment repeated on the Moon, which statement is most likely to be FALSE? [9J-45]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time,The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, and the experiment repeated on the Moon, which statement is most likely to be FALSE? [9J-46]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time,The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, and the experiment repeated on the Moon, which statement is most likely to be FALSE? [9J-47]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time,The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, and the experiment repeated on the Moon, which statement is most likely to be FALSE? [9J-48]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time,The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, and the experiment repeated on the Moon, which statement is most likely to be FALSE? [9J-49]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time,The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, and the experiment repeated on the Moon, which statement is most likely to be FALSE? [9J-50]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time,The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, and the experiment repeated on the Moon, which statement is most likely to be FALSE? [9J-51]
The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, at the same time,The earliest theories on falling objects suggested that the heavier the object, the faster it falls. We now know that all objects fall at the same speed if only the force of gravity is acting on the object. If the following four objects were dropped from 10 metres above the Earth's surface, and the experiment repeated on the Moon, which statement is most likely to be FALSE? [9J-52]
Which description corresponds to weathering? [8g-1]
Which description corresponds to erosion? [8g-2]
Which description corresponds to transportation? [8g-3]
Which description corresponds to sedimentation? [8g-4]
Which of these rocks will erode away the slowest? [8g-9]
Which of these rocks will erode away the fastest? [8g-10]
Which of these rocks will erode away the slowest? [8g-11]
Which of these rocks will erode away the fastest? [8g-12]
In general rocks can best be described as a? [8g-13]
In general rocks can best be described as a? [8g-14]
Which is TRUE about 'acidified' water acting on rocks? [8g-17]
Which is TRUE about 'acidified' water acting on rocks? [8g-18]
Which is TRUE about 'acidified' water acting on rocks? [8g-19]
Which is TRUE about 'acidified' water acting on rocks? [8g-20]
[8g-21] Freezing water can weather rocks in winter. Put the following sequence in the correct order.
[8g-22] Temperature changes can weather rocks. Put the following sequence in a possible correct order.
Which statement is TRUE about weathering due to plant growth? [8g-23]
Eroded rock material is often transported by flowing water. Which of the following statement is TRUE about this process? [8g-27]
Eroded rock material is often transported by flowing water. Which of the following statement is TRUE about this process? [8g-28]
Eroded rock material is often transported by flowing water. Which of the following statement is TRUE about this process? [8g-29]
Eroded rock material is often transported by flowing water. Which of the following statement is TRUE about this process? [8g-30]
Which is TRUE about glaciers? [8g-31]
Which is TRUE about glaciers? [8g-32]
Which is TRUE about glaciers? [8g-33]
Which is TRUE about glaciers? [8g-34]
Eroded rock material is often transported by flowing water. Which of the following statement is TRUE about this process? [8g-35]
Eroded rock material is often transported by flowing water. Which of the following statement is TRUE about this process? [8g-36]
Which statement is TRUE about fossils? [8g-37]
Which statement is TRUE about fossils? [8g-38]
Which statement is TRUE about fossils? [8g-39]
Which statement is TRUE about fossils? [8g-40]
Which is TRUE about rock formations? [8g-41]
Which is TRUE about rock formations? [8g-42]
Which is TRUE about rock formations? [8g-43]
Which is TRUE about rock formations? [8g-44]
Which is TRUE about glaciers? [8g-45]
Which part of the diagram corresponds to where sedimentary rocks are most likely to form? [8h-1]
Which part of the diagram corresponds to where sedimentation is most likely to take place? [8h-2]
Which part of the diagram corresponds to where transportation of eroded rock material is most likely to take place? [8h-3]
Which part of the diagram corresponds to where igneous rocks with small crystals are most likely to be formed? [8h-4]
Which part of the diagram corresponds to where metamorphic rocks are most likely to be formed? [8h-5]
Which part of the diagram corresponds to where weathering and erosion are most likely to take place? [8h-6]
Which part of the diagram corresponds to a source of magma? [8h-7]
Which part of the diagram corresponds to where igneous rocks with large crystals will form? [8h-8]
Which part of the diagram corresponds to a where the igneous rock basalt might form? [8h-9]
Which part of the diagram corresponds to a where the igneous rock granite might form? [8h-10]
Which part of the diagram corresponds to a where sandstone might form? [8h-11]
Which part of the diagram corresponds to a where marble might form? [8h-12]
Which part of the diagram corresponds to a where limestone might form? [8h-13]
Which part of the diagram corresponds to a where the metamorphic rock slate might form? [8h-14]
Which part of the diagram corresponds to a where fossil formation might start? [8h-15]
Which part of the diagram corresponds to a where fossils are most likely to be destroyed? [8h-16]





Which sequence most closely describes the process of forming sandstone? [8h-23]
Which is TRUE about sedimentary rocks? [8h-24]
Which is TRUE about sedimentary rocks? [8h-25]
Which is TRUE about sedimentary rocks? [8h-26]
Which is TRUE about sedimentary rocks? [8h-27]
Which is TRUE about sedimentary rocks? [8h-28]
Which is TRUE about sedimentary rocks? [8h-29]
Which is TRUE about sedimentary rocks? [8h-30]
Which is TRUE about sedimentary rocks? [8h-31]
Which is TRUE about sedimentary rocks? [8h-32]
Which is TRUE about metamorphic rocks? [8h-33]
Which is TRUE about metamorphic rocks? [8h-34]
Which is TRUE about metamorphic rocks? [8h-35]
Which is TRUE about metamorphic rocks? [8h-36]
Which is TRUE about igneous rocks? [8h-37]
Which is TRUE about igneous rocks? [8h-38]
Which is TRUE about igneous rocks? [8h-39]
Which is TRUE about igneous rocks? [8h-40]
Which of the following is a sedimentary rock? [8h-41]
Which is a very weather resistant metamorphic rock? [8h-42]
Which is an igneous rock formed from fast cooling lava pouring out into seawater? [8h-43]
Which is a sedimentary rock? [8h-44]
Which is a metamorphic rock formed from the action of heat and pressure on limestone? [8h-45]
Which is an igneous rock formed from molten magma cooling slowly in the Earth's crust? [8h-46]
Which is a sedimentary rock? [8h-47]
Which is a metamorphic rock? [8h-48]
Which is a sedimentary rock formed from eroded rock particles? [8h-49]












Below is a series of steps that produces a sedimentary rock like sandstone, but the steps are in the wrong order.
Which is a sedimentary rock formed from the harder shelly or skeletal mineral remains of sea creatures? [8h-57]
Which statement is TRUE about soil? [9g-1]
Which statement is TRUE about soill? [9g-2]
Which statement is TRUE about soil? [9g-3]
Which statement is TRUE about soill? [9g-4]
Which statement is TRUE about soil? [9g-5]
Which statement is TRUE about soil? [9g-6]
Which statement is TRUE about soil? [9g-7]
Which statement is TRUE about soil? [9g-8]
Which is TRUE about the weathering of buildings? [9g-9]
Which is TRUE about the weathering of buildings? [9g-10]
TRUE about the weathering of buildings? [9g-11]
TRUE about the weathering of buildings? [9g-12]
Which of these is the main source of sulphur dioxide that causes acid rain? [9g-13]
Which of these is a source of sulphur dioxide which causes acid rain? [9g-14]
Which building material is least likely to be rapidly eroded by acid rain? [9g-15]
Which building material is least likely to be rapidly eroded by acid rain? [9g-16]
Which building material is likely to be the most rapidly eroded by acid rain? [9g-17]
Which building material is most likely to be most rapidly eroded by acid rain? [9g-18]
Which is used for the rapid treatment of lakes which are to acid for most aquatic life? [9g-19]
Which of these is a fossil fuel for power stations? [9g-20]
Which of these is a fossil fuel for power stations? [9g-21]
Which of these is a fossil fuel for power stations? [9g-22]
Which best describes the formation of a fossil fuel? [9g-23]
Which most likely provides evidence of global warming? [9g-28]
Which most likely provides evidence of global warming? [9g-29]
Which most likely provides evidence of global warming? [9g-30]
Rainwater is naturally acidic due to dissolved? [9g-31]
Which explains the importance of the ozone layer? [9g-32]
Which word equation corresponds to respiration? [9g-33]
Which word equation corresponds to a fossil fuel combustion? [9g-34]
Which word equation corresponds to photosynthesis? [9g-35]

Rainwater always contains small amounts of the weakly acidic gas carbon dioxide dissolved from air. Which most likely describes what happens to the pH of rainwater when it runs over limestone rock? [9g-37]
Which harmful gas is reduced in car exhaust emissions by using a catalytic converter? [9g-38]
Which harmful gas is reduced in car exhaust emissions by using a catalytic converter? [9g-39]
Which is believed to be the current main cause of the so-called 'Greenhouse Effect'? [9g-42]
Which of the following explains the 'Greenhouse Effect'? [9g-43]
Which of these causes a reduction in the ozone layer? [9g-44]
What is another term for the 'Greenhouse Effect'? [9g-45]
Which of the following is a gas emitted from factories and power stations that causes acid rain? [9g-46]
Which of the following 'phrases' describes how pollution is reduced in the exhaust of a motor vehicle? [9g-47]
Which of these is a power station fuel, which does not produce carbon dioxide that causes the 'Greenhouse Effect' or 'global warming'? [9g-20]
Which is a harmless colourless liquid at room temperature, formed by the combustion of a fossil fuel? [9g-49]
Which is a harmless colourless gas at room temperature, formed by the combustion of a fossil fuel? [9g-50]
Which gas in the atmosphere most contributes to global warming? [9g-51]
Which most likely provides evidence of global warming? [9g-52]