End of Year Test

Look at the pictures. When a marble is placed at the top of a maze and released, it moves through the maze until it reaches the bottom. A marble is released at the top of each maze. What can be observed by watching the marbles? Choose three correct answers.

• the position of each marble

• the direction of each marble

• the mass of each marble

• the change in speed of each marble

Look closely at step 2 in the pattern. In step 2, the rower (pulls / pushes) the top of the oars toward her so the oar paddle pushes on the (boat / water). This force allows the boat to move in the (opposite direction of / same direction as) the rower.

Which step in the rowing pattern follows step 4?

• A.

• B.

• C.

• D.

Look at step 3 in the rowing pattern. The net force in step 3 of the rowing pattern is (equal to / greater than / less than) zero. The boat in step 3 is (in motion / not in motion).

Look at the picture and table. In which trial does the box not move?

• trial 1

• trial 2

• trial 3

• trial 4

What does Brady's investigation show?

• the effects mass has on the force needed to move a block

• the furthest distance a rubber band can be pulled

• the strength and flexibility of a rubber band

• the effects of balanced and unbalanced forces on the motion of a block

Predict the motion of the block if the rubber band is pulled 25 centimeters. Use Brady's observations as evidence. The block will move (exactly / less than / more than) 6 centimeters.

Marissa knows that two balloons have opposite charges. She draws this picture to show what will happen if she brings the two balloons close together. Marissa's drawing is incorrect. Which change will make her drawing correct?

• Change the direction of both arrows so they point toward each other.

• Change the direction of one arrow so they both point to the left.

• Change the number of charges on both balloons.

• Change the number of charges on one balloon so it is neutral.

Circle the words that correctly complete each sentence. Before rubbing, the ruler has (no electric charge / a negative charge / a positive charge) and the cloth has (no electric charge / a negative charge / a positive charge). After rubbing, the ruler has (no electric charge / a negative charge / a positive charge) and the cloth (has a positive charge / has no electric charge / is neutral).

After Sierra rubs the plastic ruler with the cloth, she moves the plastic ruler close to a small neutral object. What did Sierra most likely observe between the ruler and the small object?

• The ruler causes the object to change colors.

• The ruler attracts the object.

• The ruler repels the object.

• The ruler has no effect on the object.