8th Grade Science Assessment Review #3

A baseball player swings his bat and hits the ball along the ground. It rolls for some time and comes to a stop on the level playing field. What most likely causes the ball to stop moving?

• a frictional force

• a gravitational force

• the mass of the ball

• the size of the bat

Tags

NGSS.MS-PS2-2

How is thermal energy transferred during heat conduction within a metal wire?

• motion of electrons through the wire

• transfer of electrons from atom to atom

• transfer of kinetic energy between colliding particles

• transfer of potential energy between colliding particles

Tags

NGSS.HS-PS3-4

During class, the teacher showed an enlarged image of a small piece of sidewalk. The students saw that the sidewalk was rougher than they had previously thought. Which effect would the rough surface have on a box that is pulled along the sidewalk?

• it would decrease the resistance between the forces that are pulling the box

• it would help reduce the force of gravity when the box is pulled

• it would oppose the force that is being applied to the box when it is pulled

• it would reduce the amount of work that is performed when pulling the box

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

The graph shows the distance for a runner at different intervals during a race. During which part of the race did the runner move the fastest?

• 0-10 minutes

• 10-30 minutes

• 40-60 minutes

• 70-80 minutes

Two point charges create the electric field as shown. Apply the rules for the geometry of electric fields to determine the charges of X and Y.

• X is a positive charge and Y is a negative charge

• X is a negative charge and Y is a positive charge

• X and Y are both positive charges

• X and Y are both negative charges

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

John heated two beakers, each containing 100 mL of water. The water began to boil and John loosely wrapped one of the beakers in five layers of aluminum foil. He left the second beaker unwrapped. He measured the temperatures of the water in the beakers over time and recorded his data in the table. Which statement best explains John's observations?

• Aluminum foil is a good conductor of thermal energy.

• Layers of air between the foil wrappings reduced the transfer of heat.

• The layers of aluminum foil absorbed heat instead of transferring it.

• The warmer atmosphere around the foil-wrapped beaker prevented the transfer of thermal energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Water molecules are polar, as shown in the diagram. If you rub a balloon against your hair, your hair obtains a net positive charge. If you then place the balloon near a thin stream of water, how will the stream of water be affected?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3

Which results in a chemical change?

• A student colors a paper blue.

• A teacher feels a rough cloth.

• A student smells a flower.

• A teacher lights a candle.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Sodium sulfate and barium chloride react with each other to form sodium chloride and barium sulfate, as shown in the illustration. Which statement most accurately describes the mas of the reactants compared to the mass of the products?

• The mass of the reactants is the same as the mass of the products.

• The products have a greater mass because matter was created during the reaction.

• The reactants have a greater mass because some of the mass was converted to heat.

• The reactants have a greater mass because some matter was destroyed by the reaction.

Tags

NGSS.MS-PS1-5

Which observation indicates that a chemical reaction has taken place?

• A material changes from a solid to liquid.

• A new chemical substance is formed.

• A Substance becomes warmer.

• Bubbles form when a liquid is heated.

Tags

NGSS.MS-PS1-2