Question

choose the correct word or term for each statement. write your choice in the spaces provided.
figure a
figure b

1. during the day, rocks ____________.

expand, contract

1. during the night, rocks ____________.

expand, contract

1. repeated contraction and expansion strain rocks. strain can ___________

rocks.
cool, crack

1. changes of temperature can cause ___________ weathering.

chemical, mechanical

1. water ___________ seep into cracks easily.

does, does not

1. water ___________ when it freezes.

expands, contracts

1. ice presses against the cracks in rocks. the pressure can ___________ rocks.

contract, crack

1. frost action is an example of ___________ weathering.

chemical, mechanical

Explanation:

1.

During the day, the sun heats rocks, causing them to expand due to thermal expansion.

At night, rocks cool down, so they contract as temperature decreases.

Repeated strain from expansion and contraction can cause rocks to crack (develop fractures).

Answer:

expand

2.