8th grade midterm

What are the four phases of matter?

• solid, liquid, and gas and plasma

• solid, gas, plasma and uranium

• hot, cold, and warm and tepid

• liquid, air, and fire and ice

solids have particles that are free flowing

• true

• false

Tags

NGSS.MS-PS3-4

What is the atomic number of carbon?

• 8

• 3

• 6

• 12

Tags

NGSS.MS-PS1-1

Family # 18, the farthest to the right on the period table, are the noble gases.

Name two of these noble gases.

• Helium and Neon

• Oxygen and Nitrogen

• Carbon and Hydrogen

• Hydrogen and Nitrogen

What is the charge of a proton?

• 0

• +1

• -1

• 2

How many electrons can the first energy level of an atom hold?

• 3

• 2

• 5

• 10

What happens to the boiling point of a substance as pressure increases?

• Decreases

• Remains the same

• Becomes solid

• Increases

Tags

NGSS.MS-PS1-4

What is the process called when a solid turns directly into a gas without passing through the liquid state?

• sublimation

• condensation

• evaporation

• melting

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A brittle element that is not a good conductor of heat and electricity is

• metal
• non-metal
• alloy
• conductor

What element is called the "basis of life"?

• Carbon
• Nitrogen
• Hydrogen
• Oxygen

Tags

NGSS.HS-LS1-6