8th Grade Science General EOG Review

The _____ states that the atoms that were present in the beginning of the chemical reaction must be present at

the end of the chemical reaction.

• Law of Matter

• Law of Conservation of Mass

• chemical equation

• chemical reaction

Tags

NGSS.MS-PS1-5

Which of the following is NOT one of the statements of the cell theory?

• All cells come from other living cells.

• All living things use cells to carry out their basic life functions.

• All living things are made of one or more living cells.

• All living things reproduce through mitosis.

Tags

NGSS.MS-LS1-1

Is this equation balanced?

5KMnO₄ --> 2K₂O + 4MnO + 6O₂

• yes

• no

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many protons does this element have?

• 36

• 18

• 17

• 19

Tags

NGSS.MS-PS1-1

Water with a greater density is

• heavier, so it will rise to the surface.

• heavier, so it will sink below the surface.

• lighter, so it will rise to the surface.

• lighter, so it will sink below the surface.

A substance made of only one type of atom is a (n)

• element.

• compound.

• mixture.

• solution.

Viruses need living cells to

• get energy.

• reproduce.

• eat.

• move.

Which of the following statements about the Earth's water is NOT true?

• Most of the Earth's freshwater is found frozen in glaciers or icecaps.

• About 97% of the Earth's water is found in the ocean.

• Only about 3% of the Earth's water is freshwater.

• Most of the freshwater is on the Earth's surface.

Tags

NGSS.MS-ESS2-4

An element that is solid at room temperature, ductile, malleable, shiny, and a good conductor is a(n)

• metalloid.

• metal.

• nonmetal.

• nobel gas.

After fishing in the ocean, a student left his fishing gear in the sun to dry. Later, he noticed that small white crystals had

formed on the rod, reel, and fishing line. Which of these is the best explanation of what occurred?

• The water evaporated from the fishing gear, and sand was attracted to it.

• The fish that were caught left scales on the fishing gear.

• The salt in the ocean water reacted with the fishing gear and caused it to rust.

• The water evaporated from the fishing gear, and salt from the ocean was left behind.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4