Front

What is a river delta?

Back

A river delta is a landform that forms at the mouth of a river where it meets a larger body of water, typically shaped like a triangle.

Front

What process causes delta formation?

Back

The process that causes delta formation is the deposition of sediments.

Front

What is an amphibian?

Back

An amphibian is a type of animal that can live both in water and on land, such as frogs and salamanders.

Front

What tool allows scientists to observe the smallest cells?

Back

A microscope allows scientists to observe the smallest cells.

Front

What must happen for a chemical reaction to occur?

Back

A new substance must be produced for a chemical reaction to occur.

Front

What is instinctual behavior?

Back

Instinctual behavior is a natural, unlearned behavior that an animal is born with, such as a spider spinning a web.

Front

What is deposition in the context of rivers?

Back

Deposition is the process by which sediments are laid down or settled at the mouth of a river.

Front

What is erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural forces such as wind or water.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not change the substance's chemical identity.

Front

What is an example of a learned behavior in animals?

Back

An example of a learned behavior is a chimpanzee using tools to find food.