TASC Science 3

Question 1

Which subatomic particle has a negative electric charge?

Accepted Answer

Electron

Answer

Electrons carry a negative charge and orbit the nucleus of an atom.

Question 2

What is the term for a substance made of two or more elements chemically combined?

Accepted Answer

Compound

Answer

A compound forms when elements bond chemically in a fixed ratio.

Question 3

When water changes from a liquid to a gas, this physical change is called what?

Accepted Answer

Evaporation

Answer

Evaporation is the change from liquid to gas at the surface of a liquid.

Question 4

On the periodic table, elements in the same vertical column are called a what?

Accepted Answer

Group

Answer

Elements in the same vertical column form a group and share similar properties.

Question 5

Which type of chemical reaction releases energy, often as heat?

Accepted Answer

Exothermic

Answer

Exothermic reactions release energy, usually in the form of heat, to the surroundings.

TASC Practice Test