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Plant Growth Experiment: Sandstone vs Sand

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Plant Growth Experiment: Sandstone vs Sand

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Questions and Answers

What is the main process that breaks down rocks into smaller particles and forms soil?

Weathering (correct)

Humus formation

Gravity

Erosion

Which of the following natural processes can cause sandstone to become sand?

Erosion by wind

Erosion by water

Expansion of ice in cracks

All of the above (correct)

What is the role of humus in soil formation?

Humus is a type of erosion that forms soil

Humus is the organic material in soil that helps plants grow (correct)

Humus is a type of rock that forms soil

Humus helps break down rocks into smaller particles

Which of the following can cause erosion of soil?

All of the above Signup and view all the answers

How does the presence of plant roots affect the weathering of rocks?

Plant roots help break down rocks into smaller particles Signup and view all the answers

Which of the following is the primary cause of rock weathering?

Wind and moving water Signup and view all the answers

What is humus?

Decayed organic matter in soil Signup and view all the answers

Which of the following soil types can hold the most water?

Soil with a high clay content Signup and view all the answers

What is the sequence of events in the erosion process?

Weathering, erosion, deposition Signup and view all the answers

What can be inferred about the relationship between topsoil and humus content?

Topsoil contains more humus than subsoil Signup and view all the answers

What is the primary force that causes erosion according to the text?

Gravity Signup and view all the answers

What is the main component of humus found in soil?

Decayed plants Signup and view all the answers

Which layer of soil contains the least amount of humus according to the text?

Subsoil Signup and view all the answers

How do plant roots contribute to the weathering of rocks according to the text?

Plant roots grow into cracks in rocks and force them to split Signup and view all the answers

What is the primary process by which materials are deposited to form soil layers according to the text?

Wind and water transport Signup and view all the answers