Earth Science 2.1 Test Review

The combined number of protons and neutrons is the __________.

• atomic number

• mass number

• energy level

• isotope

Tags

NGSS.HS-PS1-8

An __________ represents the area in an atom where an electron is most likely to be found.

• energy level

• isotope

• atomic number

• mass number

An atom that gains or loses an electron is a charged particle called __________.

• an ion

• a molecule

• an element

• a compound

Tags

NGSS.HS-PS1-2

A tiny particle that has mass and a positive electrical charge is a __________.

• neutron

• proton

• electron

• ion

__________ are solutions characterized by the formation of hydroxide ions (OH⁻).

• Acids

• Bases

• Elements

• Compounds

The process of changing from a liquid into a gas is called __________.

• evaporation

• sublimation

• condensation

• freezing

Tags

NGSS.MS-PS1-4

The basic building blocks of matter are

• molecules.

• elements.

• atoms.

• compounds.

Tags

NGSS.HS-PS1-7

Chemical behavior is determined by the number of electrons located in the

• second energy level.

• third energy level.

• innermost energy level.

• outermost energy level.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A combination of two or more components that retain their identity is a(n)

• base.

• mixture.

• solution.

• acid.

Which of the following changes of state releases thermal energy?

• evaporation

• sublimation

• melting

• condensation

Tags

NGSS.MS-PS1-4