Neutralization is a reaction between a(n)

• acid and a base.

• acid and a metal.

• base and a salt.

• salt and water.

Tags

NGSS.MS-PS1-5

Acids are described as corrosive because they

• turn litmus blue.

• taste bitter.

• “wear away” at other materials.

• feel slippery.

The chemical name for the compound with the formula Na₂S is

• sodium fluoride.

• magnesium sulfide.

• lithium oxide.

• sodium sulfide.

A mixture made of two or more elements, at least one of which is a metal is called a(n)

• superconductor.

• metallic bond.

• complex metal.

• alloy.

A chemical bond formed when two atoms share electrons is called a(n)

• ionic bond.

• covalent bond.

• metallic bond.

• polyatomic bond.

Tags

NGSS.HS-PS1-1

The distance between two corresponding parts of a wave is the wave’s

• amplitude.

• wavelength.

• frequency.

• speed.

The maximum distance that the particles of a medium move from the rest position is the

• amplitude of the wave.

• wavelength of the wave.

• frequency of the wave.

• speed of the wave.

Tags

NGSS.MS-PS4-1

Mechanical waves are classified according to

• their size.

• their shape.

• how they move.

• their source.

The only sure evidence for a chemical reaction is

• the formation of a gas.

• a color change.

• the production of one or more new substances.

• changes in properties.

Tags

NGSS.MS-PS1-2

The principle of conservation of mass is true

• only for reactions that take place in open systems.

• only for reactions that take place in closed systems.

• for reactions in both open and closed systems.

• for no reactions at all.

Tags

NGSS.MS-PS1-5