What is matter?

The smallest unit of each element:

• compound

• molecule

• atom

• cell

Two or more atoms bonded together:

• cell

• molecule

• nucleus

• tissue

Tags

NGSS.MS-PS1-1

Two or more atoms of different elements bonded together could correctly be called this (ex: water or methane). Choose all that apply:

• Molecule

• Atom

• Compound

• Cell

Tags

NGSS.MS-PS1-1

An atom or group of atoms with a charge (+ or - ) because it either gained or lost an electron, is known as this.

• ion

• isotope

• organic compound

• covalent bond

Tags

NGSS.MS-PS1-1

What is the range of the pH scale?

• 0-5

• 0-7

• 0-10

• 0-14

Tags

NGSS.MS-PS1-2

Distilled water has a neutral pH. What number is it on the pH scale?

• 3

• 7

• 5

• 6

Solutions with a pH lower than 7 are considered:

• acids

• bases

Seawater has an average pH of about 8.1 so this makes it:

• acidic

• neutral

• basic/alkaline

These are different varieties of an element that have varying numbers of neutrons, and therefore have different mass. Examples are carbon 12, carbon 13, and carbon 14.

• ions

• compounds

• isotopes

• metals

Tags

NGSS.MS-PS1-1

Solid water melting and becoming liquid water, and evaporating to water vapor:

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4