What does physical weathering do to rocks?

• Changes its composition

• Breaks it into pieces

• Dissolves the rock

• Increases its weight

Which type of weathering changes the composition of rocks?

• Physical weathering

• Biological weathering

• Chemical weathering

• Mechanical weathering

What is an example of chemical weathering?

• Oxidation

• Abrasion

• Frost action

• Plant roots

Which of the following is not a type of physical weathering?

• Reactions with acidic water

• Abrasion

• Plant roots

• Frost action

What does abrasion in weathering cause?

• Dissolution of rocks

• Decrease in rock size

• Smooth and rounded surfaces

• Increase in chemical reactions

What factor increases the rate of weathering due to more exposure?

• Less surface area

• Lower temperatures

• More surface area

• More exposure

Which climate is most dominant for chemical weathering?

• Cold and dry

• Hot and humid

• Mild and wet

• Hot and dry

What happens to the weathering rate when a rock is broken into more pieces?

• It stops

• It decreases

• It remains the same

• It increases

Which factor does not affect the rate of weathering?

• Color of the rock

• Climate

• Mineral composition

• Surface area

What is the effect of harder minerals on the rate of weathering?

• Increases the rate

• Varies unpredictably

• Decreases the rate

• Has no effect