1. Name the first 8 planets in order

3. What is the cause of the gravitational force between the earth and the sun?
A. Earth’s magnetic field causes the gravitational force
B. The sun’s rotation about its axis causes the gravitational force
C. The masses of both the Earth and the Sun cause the gravitational force
D. The tangential velocity of the Earth causes the gravitational force

4. All objects have a force that attracts them towards each other
All objects have a force that attracts them towards each other. This is called gravity. Even you attract other objects to you because of gravity, but you have too little mass for the force to be very strong.

5. What unit is used to measure weight?

6. ANSWER: NEWTONS
Weight is not the same as mass. Mass is a measure of how much stuff is in an object. Weight incorporates the force of gravity acting on that stuff.
Remember that mass is measured in kg and weight is measured in Newtons.

8. Excluding wind resistance, when dropped from the same height, which object hits the ground first?

10. Astronauts on an orbiting space station experience weightlessness because?
A: There is no gravity in space and they do not weigh anything
B: Space is a vacuum and there is no gravity in a vacuum
C: Space is a vacuum and there is no air resistance in a vacuum
D: The astronauts are far from Earth’s surface at a location where gravity has a minimal effect.

11. ANSWER: NONE OF THE ABOVE
Astronauts fall to earth at exactly the same rate that the curve of the earth falls away from the astronauts. They are constantly falling around the earth

12. Using the following words axis, hemisphere, equator, tilt and orbit to draw and describe the reason for seasons.

13. EARTH’S TILT
As the earth orbits around the Sun on a tilted axis (23.5 degrees).
The axis points in the same direction the whole time .

14. EARTH’S TILT
Sometimes the top half of the earth/axis is pointing towards the sun, while at other times it points away.

15. EARTH’S TILT
During our summer, the southern hemisphere is tilted towards the sun.

17. What is a light year?

18. A measurement of distance based on how far light can travel in one year.

19. How long does it take for the light leaving the sun to reach earth?

21. What is it called when the earth is between the sun and the moon?

22. Lunar eclipse Eclipse : Object being obscured.