Science department Quarter 3 ( 2014/2015 ) Grade 5 Revision Sheet Name: Class: Multiple Choice

What does the arrow on the diagram show?

____ 26. Why is the sun considered the center of the solar system?

____ 27. The diagram below shows the orbit of Earth and the orbit of Borrelly.

Which of these types of space objects is Borrelly most likely to be?

____ 28. Ganymede is a moon of Jupiter. It is larger than Mercury and has a metallic core similar to Earth’s core. Which of these statements best explains why Ganymede is classified as a moon rather than a planet?

____ 29. During a visit to an observatory, Silvano observed the moon, Venus, the sun, and the star Sirius. Which of these objects is outside of the solar system?

____ 30. Which of these characteristics distinguishes the outer planets from the inner planets?

____ 31. Earth and Saturn are both planets orbiting the sun. Which of these other features do the two planets have in common?

____ 32. The masses of objects in the solar system can be reported by comparing them to the mass of Earth. Which of these planets in the solar system most likely has a mass more than 300 times greater than the mass of Earth?

____ 33. A comet is a chunk of frozen gases, rock, ice, and dust. When does a comet form a visible tail?

1. Most fossils are made of hard parts—bones, shells, or teeth. Soft parts such as skin, organs, eyes and muscle are rarely preserved as fossils. Why is this so?

1. 
   A
   
2. 
   C
   
3. 
   A
   
4. 
   C
   
5. 
   A
   
6. 
   A
   
7. 
   C
   
8. 
   B
   
9. 
   D
   
10. 
    C
    
11. 
    C
    
12. 
    D
    
13. 
    D
    
14. 
    C
    
15. 
    A
    
16. 
    C
    
17. 
    D
    
18. 
    C
    
19. 
    D
    
20. 
    C
    
21. 
    B
    
22. 
    A
    
23. 
    C
    
24. 
    D
    
25. 
    A
    
26. 
    D
    
27. 
    B
    
28. 
    B
    
29. 
    A
    
30. 
    A
    
31. 
    B
    
32. 
    A
    
33. 
    D
    

1. Sample answer: Soft parts are very easily eaten by predators or decomposed by bacteria. Over time, it is the hard parts that are left behind.

2. Sample answer: The gas giants are larger than the rocky planets but have only a small core. They have very thick atmospheres. This is why they are larger than the rocky planets but have lower densities.

3. Sample Answer: The hardness and streak of both minerals could be tested. Pyrite is harder than gold and has a greenish-black streak.

4. Sample answer: Jupiter and Saturn are both very large planets with large diameters. They also both have thick atmospheres. One difference between Jupiter and Saturn is that Jupiter is closer to the sun. Saturn also has the unique feature of having obvious rings around it.

Students may include these similarities:

• small, solid core

• thick atmosphere

• large size

• large diameter

• large mass

• low density

• long period of revolution

• orbit the sun

• great distance from the sun

• many moons

• Saturn is farther from the sun than Jupiter.

• Jupiter is larger than Saturn.

• Jupiter has a larger diameter than Saturn.

• Jupiter has a greater mass than Saturn.

• Jupiter has a large red spot.