Science NWEA

Which is an example of melting?

• Heating a block of ice until it turns to water.

• Warming a pan of water until the water is all gone.

• Stirring some sugar in water until the sugar is invisible

• Cooling water in the freezer until the water becomes solid.

Tags

NGSS.MS-PS1-4

The diagram shows a wedge being used to split a log. Which arrow best shows how the wedge changes the direction of the applied force?

• Downward arrow

• Upward arrow

• Sideways arrows on both sides, and downward arrow

• No change in direction

Tags

NGSS.MS-PS2-1

Emilio is preparing lemonade. He first mixes 100 g of lemon juice with 400 g of water. He then adds 200 g of sugar. How much does the lemonade weigh?

• 200 g

• 400 g

• 500 g

• 700 g

Tags

NGSS.MS-PS1-5

Students designed and built this marble roller coaster. The only constraint was that the marble must start at rest from a height of 20 cm. Their design failed; the marble did not get over the hill before the finish. How should the students redesign their roller coaster?

• The start should be closer to the hill so the marble rolls down a steeper slope and gathers more kinetic energy.

• The start should be farther from the hill so the marble can build up more kinetic energy as it approaches the hill.

• The start should be lower than the top of the hill so the marble has less potential energy and more kinetic energy.

• The start should be higher than the top of the hill so the marble has more potential energy to be converted to kinetic energy.

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A student experiments with magnets. (191-200) Which group of magnets has attractive forces between all 3 magnets?

• A.

• B.

• C.

• D.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which observation indicates that a substance is a mixture?

• It separates into 2 layers after 24 hours.

• It remains the same color when cut in half.

• It turns black and emits smoke when burned.

• It breaks into 4 pieces when hit with a hammer.

Solid steel balls are located on ramps as shown. Which ball has the greatest gravitational potential energy?

• A.

• B.

• C.

• D

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

The diagram shows the parts of a plant. Which part is labeled with the X?

• Flower

• Leaf

• Root

• Stem

Tags

NGSS.4-LS1-1

Two students are skating. They wonder what happens when one student pushes off the other. The picture shows Student A pushing off Student B. Which description best describes what happens next to each student? (Assume no loss of energy due to friction between the skates and the floor.)

• Both students will move backward. Student A will move twice as fast as Student B.

• Both students will move backward with the same speed because the force is applied to both.

• Student A will move backward. Student B will remain stationary because he has the most mass.

• Student B will move backward. Student A will remain stationary because he provided the force.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A group of chipmunks live in a student's backyard. The student observes the chipmunks in the yard all summer but does not see them during the winter. Why does the student see the chipmunks only in the summer?

• The chipmunks' fur turns white in the winter.

• The chipmunks hide from predators in the winter.

• The chipmunks are active only at night in the winter.

• The chipmunks have to hibernate to survive in the winter.