Matter

Which is a homogeneous mixture?

• pizza

• vinegar

• concrete

• woven fabric

Which represents a compound?

• air

• iron

• soil

• water

Tags

NGSS.MS-PS1-1

Can a phase change produce new compounds?

• No, because physical changes occur.

• No, because chemical changes occur.

• Yes, because atoms can bond together to form new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which is the best example of a heterogeneous mixture?

• sugar

• brass

• salad

• salt water

Which substance is composed of only one type of atom?

• element

• mixture

• solution

• molecule

Why is carbon an element and not a compound?

• All carbon atoms have the same number of protons.

• Carbon bonds easily with oxygen, but not helium.

• Carbon is found in all living organisms.

Tags

NGSS.MS-PS1-1

Which of the following is NOT a pure substance?

• water

• helium gas

• table salt

• air

An element is identified by

• its number of protons.

• the atomic mass.

• the type of charge.

• its number of isotopes.

Each of the elements in the periodic table has a specific number. What does this number represent?

• the half-life

• the number of neutrons

• the number of protons

• the number of isotopes

The chemical formula for baking soda is NaHCO₃. How many different elements make up baking soda?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1