Earth's Movements

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. is not a perfect . It at the and is somewhat flat at the poles.

2. Earth like a top. The center line around which Earth spins is called Earth’s .

3. The of Earth on its is called .

4. A takes about .

5. Scientists hypothesize that the movement of material inside Earth’s core, along with Earth’s , generates a . Earth’s magnetic field protects you from harmful radiation.

6. Earth’s causes day and .

7. Another movement of Earth is called revolution. is Earth’s , or the path of Earth, as it the Sun. It takes a for Earth to orbit the Sun.

8. The of Earth’s path around the Sun is an (ee LIHPS)—a long, curved shape, similar to a .

9. Earth is to the Sun around 3, and from the Sun around 4.

10. axis is

11. The explains why Earth receives such a of solar from place to place .

12. In the , begins in and ends in September. This is when the northern hemisphere is the Sun.

13. During , there are hours of sunlight—or . Longer periods of sunlight are one reason that summer is warmer than winter, but this is not the only reason.

14. Earth’s causes the to strike the hemispheres at different .

15. Sunlight strikes the the Sun at an angle closer to than the hemisphere tilted away.

16. occurs in the hemisphere , when its strikes Earth at a and for longer periods of time.

17. The is the day when the reaches its north or south of the .

18. is the period of of the year.

19. The is the period of of the year.

20. An (EE kwuh nahks) occurs when the is directly .

21. a year the Sun is directly . This results in the .

22. During an , neither the northern nor the southern hemisphere is . The number of and nighttime hours is nearly the world.

23. In the , the occurs on or 21, and the occurs on or 23.