HOMS Review: Changes in Matter

Front

What is the melting point?

Back

The temperature at which a solid becomes a liquid; it is a physical property.

Front

Is the melting point a chemical or physical property?

Back

Physical Property.

Front

What does the law of conservation of mass state?

Back

The total mass of reactants equals the total mass of products in a chemical reaction.

Front

Are the atoms of reactants and products the same according to the law of conservation of mass?

Back

Yes, the atoms are equal.

Front

What is a chemical property?

Back

A characteristic of a substance that can only be observed during a chemical reaction, such as reactivity with acid.

Front

Is 'reacts with acid' a chemical or physical property?

Back

Chemical Property.

Front

What are indications of a chemical change?

Back

Temperature change, formation of a precipitate, production of light.

Front

Which of the following is NOT an indication of a chemical change?

Back

Shape change.

Front

What does it mean if a reaction does not follow the law of conservation of mass?

Back

It means that the number of atoms in the reactants does not equal the number of atoms in the products.

Front

What is an example of a physical change?

Back

Melting ice into water.