Bacola Benchmark Review December 2023

Front

What is the chemical formula for water?

Back

H₂O

Front

What process breaks down rock creating a new substance?

Back

Chemical weathering

Front

How many neutrons does an atom of iron have?

Back

30

Front

In an experiment, if oil is used to heat a school building, what is the dependent variable?

Back

Amount of air pollution

Front

Why do water molecules stick together?

Back

One side has a positive charge and the other side has a negative charge.

Front

What is the definition of physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is the definition of chemical weathering?

Back

The process that breaks down rocks through chemical reactions, forming new substances.

Front

What is a neutron?

Back

A subatomic particle found in the nucleus of an atom, with no electric charge.

Front

What is the definition of a dependent variable in an experiment?

Back

The variable that is measured or observed in response to changes in the independent variable.

Front

What is the definition of air pollution?

Back

The presence of harmful substances in the air that can affect health and the environment.