Physical Science Final (60%)

Front

What are ionic compounds composed of?

Back

Ionic compounds are composed of metallic and nonmetallic elements.

Front

What does the law of conservation of mass state?

Back

The mass of the products of a chemical reaction are always equal to the mass of the reactants.

Front

What is the relationship between voltage (V), current (I), and resistance (R)?

Back

The relationship is given by the equation V = IR.

Front

What happens to current when resistance increases in a circuit?

Back

The current decreases.

Front

What occurs to the pressure of a gas in a rigid container if the velocity of gas molecules increases?

Back

The pressure of the gas will increase.

Front

What characterizes radioactive isotopes?

Back

Radioactive isotopes have very unstable nuclei.

Front

Define an ionic bond.

Back

An ionic bond is a chemical bond formed between two ions with opposite charges.

Front

What is the formula for calculating density?

Back

Density = Mass/Volume.

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.