Name _______________________________________ Date ________________ Hour______________
Section 2-1: Weathering (p. 30)
4. Rocks on the Earth’s surface are constantly being broken down into smaller pieces.
True or False? (Circle one.)
5. The breakdown of rock into smaller and smaller pieces can occur by
means.
Mechanical Weathering (p. 30)
Mark each of the following questions True or False.
6.
Physical processes cause mechanical weathering.
7.
and
Ice, wind, gravity, and plants are all agents of mechanical weathering.
8. Look at the Chemistry Connection on page 30. When water freezes, it
a. becomes more dense.
b. decreases in volume.
c. becomes a gas.
d. expands.
9. What caused the granite shown in Figure 1 to break apart?
10. Gravity, water, and wind can all cause rocks to grind against each other, which wears away exposed
surfaces. True or False? (Circle one.)
11. Which of the following are examples of abrasion?
(Circle all that apply, it will be more than one answer)
a. one rock falling against another rock
b. wind blowing sand against rock
c. pebbles bumping against each other in a stream
d. sunlight striking a rock
12. Figure 3 shows a ventifact, a rock that has been shaped by
13. Can a plant break a rock apart? Explain.
14. Animals that
weathering.
, such as earthworms and ants, cause
.
Chemical Weathering (p. 33)
Mark each of the following questions True or False.
15.
Chemical weathering changes rocks into new substances.
16.
Figure 7 shows that granite will eventually turn into sand and clay due to chemical weathering.
17.
Over time, granite will dissolve in water.
18.
Nitric and sulfuric acid occur naturally in rain.
19.
The statue shown in Figure 8 was weathered by normal precipitation.
20.
The gases produced by burning fossil fuels can combine with water to form acid precipitation.
21. What does the cave shown in Figure 9 have to do with chemical weathering?
22. Which of the following statements are true of lichens? (Circle all that apply.)
a. They contribute to mechanical weathering.
b. They make organic acids.
c. They live only in mild climates.
d. They are an alga and a fungus living together.
23. What caused the rust on the car in Figure 11?
24. According to Figure 12, why is the rock at Capitol Reef National Park red?
SECTION 2-1 Vocabulary
In your own words, write a definition for the following terms in the space provided.
1. weathering
2. mechanical weathering
3. abrasion
4. chemical weathering
5. acid precipitation
6. oxidation