W.E.D Test Review

Front

What is physical weathering?

Back

Physical weathering is the process of breaking down rocks and minerals into smaller pieces without changing their chemical composition. An example is the cracking of rocks due to freeze-thaw cycles.

Front

What is chemical weathering?

Back

Chemical weathering is the process that alters the chemical composition of rocks and minerals, often through reactions with water, acids, or gases. An example is the rusting of iron.

Front

What role do tree roots play in weathering?

Back

Tree roots can cause physical weathering by growing into cracks in rocks and expanding, which breaks the rocks apart.

Front

What is the primary agent responsible for creating sand dunes?

Back

Wind is the primary agent responsible for creating sand dunes by transporting and depositing sand.

Front

What is an independent variable in an experiment?

Back

An independent variable is the factor that is purposely changed or manipulated in an experiment to observe its effect on the dependent variable.

Front

What is a dependent variable in an experiment?

Back

A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

Front

What is a control variable?

Back

A control variable is a factor that is kept constant throughout an experiment to ensure that the results are due to the independent variable.

Front

What is the difference between mechanical and chemical weathering?

Back

Mechanical weathering breaks rocks into smaller pieces without changing their composition, while chemical weathering changes the chemical structure of the rocks.

Front

What is deposition in the context of weathering and erosion?

Back

Deposition is the process by which sediments, soil, and rocks are added to a landform or land mass, often occurring after erosion.

Front

What is an example of a hypothesis in a scientific experiment?

Back

A hypothesis is a testable statement predicting the outcome of an experiment, such as 'If I use fertilizer A, then the plants will grow taller than with fertilizer B.'