8th Grade Science Review

Front

What is the main factor that determines what a star will become?

Back

Mass is the main factor that determines the future evolution of a star.

Front

What color of star is the hottest?

Back

Blue stars are the hottest.

Front

What determines the identity of an element?

Back

The identity of an element is determined by the number of protons in its nucleus.

Front

What part of the atom is the neutron located?

Back

The neutron is located in the nucleus of the atom.

Front

Does the equation Mg + Cl2 --> MgCl2 follow the Law of Conservation of Mass?

Back

Yes, the equation is balanced and follows the Law of Conservation of Mass.

Tags

NGSS.HS-PS1-7

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Tags

NGSS.HS-PS1-8

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What is the Law of Conservation of Energy?

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3