Doc Brown's Revision KS3 Science
PHYSICS Unit 9J Gravity and space
What the Quiz is based on - original work schemes - programmes of study
All of KS3 Science is now under review
and the quizzes will be adapted to suit the NEW National Curriculum for KS3 Science
In this unit pupils:
• learn about the gravitational pull between bodies; how it depends on the masses of bodies and the distance between them
• relate the movement of planets around the Sun, and that of satellites around the Earth, to gravitation
• study how artificial satellites are used to observe the Earth and provide information about the solar system and the universe
• find out about space exploration
In scientific enquiry pupils:
• consider different views of the nature of the solar system and evaluate them against relevant evidence
• how scientists work together to gather and interpret evidence from space
• make predictions from patterns in data
• consider and evaluate conflicting evidence
This unit is expected to take approximately 7.5 hours.
This unit builds on unit 7K ‘Forces and their effects’ and unit 7L ‘The solar system and beyond’.
The unit relates to unit 9K ‘Speeding up’.
It lays the foundation for work in key stage 4 on theories about the nature and evolution of the universe.
The historical impact of discoveries in astronomy is covered in unit 21 ‘Scientific discoveries’ in the history scheme of work.
At the end of this unit
in terms of scientific enquiry
most pupils will: use a model of gravitational attraction to explain orbiting; describe how ideas of the nature of the solar system have changed over time and relate these to available evidence; make effective use of secondary sources to find information from recent space exploration about the nature of the solar system
some pupils will not have made so much progress and will: describe some early ideas about the solar system
some pupils will have progressed further and will: explain how experimental evidence has led to changes over time in models of the solar system; evaluate recent information and ideas about the origin of the Moon
in terms of physical processes
most pupils will: recognise that gravity is a universal force of attraction between objects and that this force depends on their masses and distance apart; describe how weight is different on different planets; give examples of the use of artificial satellites
some pupils will not have made so much progress and will: recognise that weight is less on the Moon; describe gravity as a force which acts throughout the solar system; give examples of the use of artificial satellites
some pupils will have progressed further and will: use data to compare gravity on different planets; describe how the forces on rockets or satellites vary as they travel away from the Earth
It is helpful if pupils know:
• that the gravitational attraction of the Earth on a mass causes weight
• about the planets of the solar system, how they orbit the Sun, and how satellites, eg moons, orbit them
• that forces affect the motion of bodies
Risk assessments are required for any hazardous activity. In this unit pupils:
• use a fast-moving object to explore orbits
Model risk assessments used by most employers for normal science activities can be found in the publications listed in the Teacher’s guide. Teachers need to follow these as indicated in the guidance notes for the activities, and consider what modifications are needed for individual classroom situations.
Through the activities in this unit pupils will be able to understand, use and spell correctly:
• words with similar but distinct meanings, eg mass, weight, gravitational attraction, orbit, revolve
• words relating to planetary motion, eg satellite
Through the activities pupils could:
• understand the effect of different aspects of formality (passive verbs, third person, abstract nouns)
• secondary sources on aspects of the solar system, space travel and satellites, eg CD-ROMs, video clips, internet
• a water rocket
• food packs labelled with the weight they would have on other planets
• information on early ideas and alternative models of the solar system and the universe from a range of cultures
• visit libraries or museums to find out more about space travel and the exploration of other planets
• find out how reception dishes for satellite TV are aligned to the position of the satellite
• use the internet to communicate with space scientists online and access images from satellites, eg NASA’s websites www.nasa.gov
• read books and watch films about space exploration and travel, eg Apollo 13
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