6-8 Review Part B

An experiment was set up to measure the distance a snail would travel in 5 minutes. Which of these rulers should be used to give the most precise measurement?

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A wheelbarrow full of concrete mix that needs to be moved onto a platform could be moved either by lifting it above the ground and setting it onto the platform or by using an inclined plane. The advantage of using the inclined plane is that the work can be done ____.

• more quickly

• with less friction

• using less force

• using more energy

Gases are much more compressible than liquids. According to the particle model of matter, gases are more easily compressed into smaller volumes because the particles in gases are ____.

• smaller

• more active

• farther apart

• filled with air

A battery is placed inside a flashlight and then the flashlight is turned on. The chemical energy of the battery is changed into all of the following forms of energy except ___.

• electrical energy

• heat energy

• light energy

• mechanical energy

Which picture illustrates the structure of a molecule of water?

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Tags

NGSS.MS-PS1-1

It is important to protect air quality because ___.

• storms worsen as air pollution decreases

• acid rain is caused by air pollution

• wind currents change when the air is polluted

• energy produced by the Sun decreases when air is polluted

Tags

NGSS.MS-ESS3-4

The diagram shows a simple food web of organisms on a forest floor. Which of these is most dependent on the earthworm for its food supply?

• Slug

• Centipede

• Ant

• Bacteria

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of these best describes the niche of a lion?

• Parasite

• Prey

• Predator

• Producer

Tags

NGSS.MS-LS2-2

Which biome is most suitable for raising crops such as corn, wheat, and oats?

• a desert

• a taiga

• a grassland

• a tropical rain forest

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS1-5

The relationship between the algae and the frog may be described as ___.

• consumer --> producer

• consumer --> decomposer

• producer --> consumer

• producer --> decomposer