Year 9 multiple-choice main test 9J Gravity and space 7A multiple-choice extension test: answers Year 9 multiple-choice main test 9J Gravity and space For each question, circle the correct answer. © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 1 When a ball is dropped from 1 metre above the Moon’s surface ... A) the ball will fall to the surface more quickly than it would on Earth B) the ball will fall to the surface more slowly than it would on Earth C) the ball will float away from the Moon D) the ball will only fall if it is pushed down © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 2 Choose the statement about gravity that is not correct. A) Gravity causes a force between objects with mass. B) Gravity only acts on objects large enough to see. C) On Earth, gravity pulls objects towards the centre of the Earth. D) The Earth attracts the Sun as hard as the Sun attracts the Earth. © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 3 Owing to their mass, all objects ... A) attract each other B) repel each other C) sink in water D) weigh nothing © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 4 A person’s pull on the Earth is ________ the Earth’s pull on the same person. A) double B) larger than C) smaller than D) the same as © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 5 The Moon affects tides on Earth more than the Sun does because ... A) the Earth is larger than the Moon B) the Moon is closer to Earth than the Sun is C) the Moon is smaller than the Sun D) the Sun is at the centre of the Solar System © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 6 On a space mission to the Moon, the most power is needed when a rocket takes off from Earth because ... A) the Earth’s gravity gets stronger as you move away from Earth B) the Earth’s gravity gets weaker as you move away from Earth C) the Moon’s gravity gets weaker as you move away from Earth D) the Moon has no gravity © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 7 The weight of an astronaut gets less as she moves away from Earth because ... A) the astronaut’s mass decreases as she moves away from Earth B) the Earth’s atmosphere gets thinner as you move away from Earth C) the Earth’s gravity gets stronger as you move away from Earth D) the Earth’s gravity gets weaker as you move away from Earth © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 8 The Moon orbits the Earth (and not the other way round) because ... A) the Earth is larger than the Moon B) the gravity on the Moon is larger than on the Earth C) the Moon does not attract the Earth D) the Sun has a bigger pull on the Earth than on the Moon © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 9 The moons round Jupiter were first seen when one of the first telescopes was used by ... A) Galileo B) Kepler C) Newton D) Ptolemy © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 10 The Earth orbits the Sun because ... A) large moving objects orbit smaller objects B) small moving objects orbit larger objects C) the Earth is spinning on its axis D) the Sun is smaller than the Earth © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 11 The Earth’s natural satellite is ... A) Halley’s comet B) the Hubble Space Telescope C) the Moon D) the Sun © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 12 Geostationary satellites orbiting the Earth take ________ to complete one orbit. A) 12 hours B) 24 hours C) 28 days D) 365 days © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test

7A multiple-choice extension test: answers Question 13 The time it takes for a satellite to complete an orbit depends on ... A) its distance from the Earth’s surface B) its mass C) its weight D) the equipment it carries © Cambridge University Press 2003, 2006, 2010 9J multiple-choice main test