The chart shows the state of four different substances. Which substance is water?

• A

• B

• C

• D

Tags

NGSS.5-PS1-3

What is the first step in all food chains?

• producer

• consumer

• decomposer

• energy from the Sun

Why does a light go out when the switch is turned off?

• More power is needed.

• The circuit is closed.

• The flow of electricity is reversed.

• The path for the electric current is open.

Tags

NGSS.MS-PS2-3

Suppose you find a fossil that includes a jaw with all flat teeth. What could you conclude?

• The animal was a herbivore.

• The animal was a carnivore.

• The animal was an omnivore.

• The animal was a decomposer.

Tags

NGSS.MS-LS4-2

Which of the following is a sign that a chemical change has occurred?

• The object split in half.

• The object changed from a solid to a liquid.

• The temperature of the object rose from 78 F to 85 F.

• the object condensed.

Tags

NGSS.MS-PS1-2

Which of the following plant reproduces with spores?

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• 

After a trip to an aquarium, some students compared the tall fin of sharks with the tail fin of bony fish. The students made a chart listing characteristics of each type of tail fin. Based on this information, what is most likely an advantage of the bony fish tail fin over the shark tail fin?

• It is easier for a bony fish to change direction quickly since muscles control the movement of the tail fin.

• The bones in the tail fin help a bony fish sink to lower depths in the water when searching for food.

• The flexible tail fin is fanned by the water, so a bony fish uses less energy to swim.

• The thin spines of the tail fin prevent a bony fish from being seen by larger predator fish.

Tags

NGSS.MS-LS4-2

This circuit has five light-emitting diode, or LED lights. It also has one battery and one switch. Which LEDs produce light when the switch is in the position shown?

• LEDs 1, 3, and 4 only.

• LEDs, 1, 2, 3, and 4

• LEDS 3 and 4 only.

• LEDs 1, 3, 4, and 5

This diagram shows two stages in the life cycles of ladybird beetles and grasshoppers. Based on the diagram, which statement best compares the life cycles of these two types of organisms?

• Young ladybird beetles take many years to develop into adults. Young grasshoppers develop into adults quickly.

• Young grasshoppers live a a habitat that is different from that of adults. Young ladybird beetles live in the same habitat as adults.

• Young grasshoppers undergo incomplete metamorphosis to become adults. Young ladybird beetles undergo complete metamorphosis to become adults.

• Young ladybird beetles have a nymph stage before becoming adults. Young grasshoppers are larvae before becoming adults.

The Grand Canyon is more that 400 km long and is some places almost 2 km deep. Which model best represents the main process that formed the Grand Canyon?

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Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4