Question

1. how does freezing and thawing break rocks apart?

a. ice covers rock and prevents weathering.
b. water expands when it freezes, pushing rocks apart.
c. when ice thaws it pushes rocks apart.
d. water filters through sand.

1. which of these is chemical weathering?

a. rocks are split by water freezing in cracks.
b. soil is washed from the side of a mountain by rain.
c. rocks rolling and hitting against each other in a stream break apart.
d. limestone statues are worn away by rain.

1. which term refers to elements in rocks combining with oxygen?

a. erosion
b. soil production
c. oxidation
d. reduction

Explanation:

For question 3, water expands upon freezing, causing pressure on rocks and breaking them apart. For question 4, chemical weathering involves a change in the rock's chemical composition. Rain reacting with limestone (calcium carbonate) is a chemical - weathering process. For question 5, oxidation is the process where elements in rocks combine with oxygen.

Answer:

1. B. Water expands when it freezes, pushing rocks apart.
2. D. Limestone statues are worn away by rain.
3. C. oxidation