Physical Science Practice

Front

What is a chemical reaction?

Back

A process where substances (reactants) change into new substances (products) with different properties.

Front

What is an example of a situation where a chemical reaction is not taking place?

Back

Salt dissolving in water is a physical change, not a chemical reaction.

Front

How can you test the strength of a magnet?

Back

By placing it on a pile of metal paper clips and counting how many stick to it.

Front

What is a solution?

Back

A mixture where one substance (solute) is completely dissolved in another (solvent), like sugar in water.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is a pure substance?

Back

A material made of only one type of particle, with consistent properties throughout.

Front

What is the melting point?

Back

The temperature at which a solid becomes a liquid.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a combination of two or more substances that retain their individual properties, while a compound is a substance formed when two or more elements chemically bond.

Front

What is an example of a physical change?

Back

Melting ice is a physical change because it changes from solid to liquid without altering its chemical composition.

Front

What is a solute?

Back

The substance that is dissolved in a solution, such as sugar in water.