8th Science STAAR Cat 1 Review

Front

What does a chemical equation represent?

Back

A chemical equation tells us the reactants and the products, the elements that make up the reactants and the products, and the number of atoms that make up the reactants and the products.

Front

What indicates a chemical change when a substance is mixed?

Back

Indications of a chemical change include an increase in temperature and an unexpected color change.

Front

Which element is known for being ductile and malleable?

Back

Magnesium (Mg) is ductile and malleable.

Front

How many energy levels does Bromine (Br) have?

Back

Bromine (Br) has 4 energy levels.

Front

What is an example of a physical change?

Back

Water evaporating is a physical change.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances.

Front

What are reactants in a chemical equation?

Back

Reactants are the starting substances that undergo a chemical change.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an example of a chemical change?

Back

Iron rusting is an example of a chemical change.