8th Grade Science NC EOG Review

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

Front

Give an example of a chemical reaction.

Back

An iron nail rusting is an example of a chemical reaction.

Front

What is a compound?

Back

A substance composed of two or more different types of atoms bonded together.

Front

Why is water classified as a compound?

Back

Because it is a substance composed of two or more kinds of atoms (hydrogen and oxygen) bonded together.

Front

What happens to mass during a chemical reaction?

Back

The mass of the reactants is equal to the mass of the products, but gas production can lead to apparent mass loss.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

Identify an example of a mixture.

Back

Sugar water is an example of a mixture.

Front

Where is most of Earth's freshwater located?

Back

The majority of Earth's freshwater is located in polar ice caps.

Front

What is rusting?

Back

Rusting is a chemical reaction where iron reacts with oxygen and moisture to form iron oxide (rust).