End of Year Test

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

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).

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.

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.

After Sierra rubs the plastic ruler with the silk cloth, she holds the ruler over a pile of small pieces of paper. What will most likely happen if Sierra moves the ruler closer to the small pieces of paper?

• The paper scraps will fall from the ruler.

• The ruler will attract more paper scraps.

• The ruler will get hot.

• The paper scraps will repel the ruler.

Which action can Brendan do to help him identify the north and south poles of magnet 2?

• Rub the north pole of magnet 1 in the middle of magnet 2.

• Move magnet 1 further from the Y end of magnet 2.

• See if the weight of magnet 1 is the same as the weight of magnet 2.

• Hold the N pole of magnet 1 close to the Y end of magnet 2.

Brendan discovers that Y is the south pole of magnet 2. Which interactions between magnet 1 and magnet 2 can Brendan predict will happen? Choose the two correct answers.

• The north pole of magnet 1 will attract the Z end of magnet 2.

• The north pole of magnet 1 will attract the Y end of magnet.

• The south pole of magnet 1 will attract the Z end of magnet 2.

• The south pole of magnet 1 will attract the Y end of magnet 2.

When water vapor particles in the air form clouds, this is evidence of the part of the water cycle known as (condensation / evaporation). During this part of the cycle, water changes from a (gas /solid) to a liquid. When the water in clouds collects into drops, and the drops become too heavy and fall back to Earth, this is evidence of the part of the water cycle known as (humidity / precipitation).