8th Grade Science MAP Test Practice

Front

What are nonrenewable resources?

Back

Nonrenewable resources are natural resources that cannot be replenished in a short period of time. Examples include coal, oil, and natural gas.

Front

How many protons does the element with atomic number 7 have?

Back

The element with atomic number 7 has 7 protons.

Front

What particles are found in the nucleus of an atom?

Back

The particles found in the nucleus of an atom are protons and neutrons.

Front

What type of change occurs when dry ice sublimates?

Back

The change that occurs when dry ice sublimates is a physical change.

Front

What is formed when two elements chemically bond?

Back

When two elements chemically bond, they form a compound.

Front

Define a compound in chemistry.

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

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.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number of an element and its identity, as well as contribute to the positive charge of the nucleus.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus, preventing protons from repelling each other.

Front

What is sublimation?

Back

Sublimation is the process in which a solid changes directly into a gas without passing through the liquid state.