Sci 6 Sem 1 Review

What is the smallest particle of an element that still exhibits all the same properties of that element?

• an electron

• an atom

• a molecule

• a proton

Which of these substances is a compound?

• Gold (Au)

• Water (H2O)

• Oxygen (O)

• Carbon (C)

Tags

NGSS.MS-PS1-1

• 1 molecule of potassium and 2 atoms of sulfate

• 2 molecules of potassium and 1 molecule of sulfate

• 2 atoms of potassium, 4 atoms of sulfur, and 4 atoms of oxygen

• 2 atoms of potassium, 1 atom of sulfur, and 4 atoms of oxygen

Tags

NGSS.MS-PS1-1

Why is water called the "universal solvent"?

• Water is available all over the world

• Every substance will dissolve in water under the right conditions

• Water can exist in three phases: solid, liquid, and gas

• Many different kinds of substances dissolve in water.

Which is an example of mechanical weathering?

• A rock freezing and thawing

• An earthquake occurring

• A volcano erupting

• A rockslide

What percent of all water on Earth is salt water?

• 3%

• 97%

• 13%

• 50%

Tags

NGSS.MS-ESS2-4

What are the two major elements that make up Earth's atmosphere?

• Carbon and oxygen

• Carbon and hydrogen

• Nitrogen and oxygen

• Hydrogen and oxygen

The Roanoke River watershed flows into the

• North Carolina sounds

• Mississippi River

• Chesapeake Bay

• Tennessee River

Which statement best explains why ice cubes will melt in a glass of tea?

• The tea becomes saturated

• The ice cubes gain energy

• The tea's freezing point increases

• The ice cube's melting point decreases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Earth's main source of energy comes from

• the oceans

• the atmosphere

• the movement of tectonic plates

• the sun

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-4