Download Earth and the Universe Chapter Problems The Universe Class Work

Earth and the Universe Chapter Problems
The Universe
Class Work
1. List four things included in the universe.
2. What force holds galaxies together?
3. List three different types of galaxies.
Homework
4. What is the name of the galaxy in which we live?
5. In what type of galaxy do we live?
The Sun
Class Work
6. What type of celestial object is the sun?
7. When objects that are the same size are located at different distances, which object
looks bigger?
Homework
8. Is the sun the biggest star?
9. Why does the sun look brighter and bigger than all other stars?
Homework
10. What unit is used to measure distance in outer space?
11. How far can light travel in one year?
The Earth
Class Work
12. What does it mean for an object to rotate?
13. Objects rotate around what?
14. What does it mean for an object to revolve?
15. Objects revolve around what?
Homework
16. How long does one of Earth’s rotations take?
17. How long does one of Earth’s revolutions take?
18. How long does one of the moon’s revolutions take?
19. What causes the seasons?
20. When the Northern Hemisphere is tilted away from the sun, what season is it?
Observable Patterns
www.njctl.org
5th grade PSI
Earth and the Universe
Class Work
21. What causes the Earth to experience day and night?
22. What is a shadow?
Homework
23. Draw shadows onto the following objects:
Class Work
24. How do shadows change during the day?
25. What causes shadows to change during the day?
Homework
26. At what time(s) during the day are shadows the longest and shortest?
27. In relation to the location of the sun, in what direction do shadows fall?
Homework
28. What is a waxing moon doing?
29. Where is a new moon located?
30. What is a waning moon doing?
31. How much of a full moon is lit by the sun?
Class Work
32. What is a constellation?
33. Why do constellations move across the sky every night?
Homework
34. List two practical uses for constellations?
35. Why do the constellations we see change from month to month?
36. What three factors determine the constellations visible at any one time?
www.njctl.org
5th grade PSI
Earth and the Universe
Answer Key
1. Living things, planets, stars and galaxies
2. Gravity holds galaxies together.
3. Elliptical, irregular and spiral
4. We live in the Milky Way galaxy.
5. The Milky Way is a spiral galaxy.
6. The sun is a star.
7. The closer object is closer.
8. The sun is not the biggest star.
9. The sun looks bigger and brighter because it is the closest star to us.
10. Light-years measure distance in space.
11. Light can travel 10 trillion km in one year.
12. When an object rotates, it turns in a circle.
13. Objects rotate around an axis.
14. When an object revolves, it travels in a repeating pathway.
15. Object revolve around an orbit.
16. Earth rotates every 24 hours.
17. Earth revolves every year (365 days).
18. The moon revolves every 28 days.
19. The tilt of the Earth as it revolves around the sun causes the seasons.
20. When the Northern Hemisphere is tilted away from the sun, it is winter.
21. Day and night is caused by the sun shining while Earth rotates.
22. A shadow is the absence of light.
23. Draw shadows onto the following objects:
24. Shadows change length and direction during the day.
25. As the Earth rotates, the sun’s angle in the sky changes. This causes shadows to change.
26. A waxing moon is getting bigger.
27. A new moon is located between the Earth and the sun.
28. Shadows are longest in the morning and evening and shortest in the middle of the day.
29. Shadows fall in the opposite direction of the sun’s location.
30. A waning moon is getting smaller.
31. A full moon is ½ lit by the sun.
www.njctl.org
5th grade PSI
Earth and the Universe
32. A constellation is a group of stars in a recognizable pattern.
33. As the Earth rotates, it makes the constellations look as though they are moving across
the sky.
34. Constellations can be used as calendars and navigational guides.
35. As the Earth revolves around the sun, the constellations visible from Earth changes.
36. Earth’s rotation, Earth’s revolution and your location on Earth
www.njctl.org
5th grade PSI
Earth and the Universe