End of Year Review 3

A driver starts her car and steps on the gas. A few minutes later she suddenly slams on the brakes to avoid hitting a box in the road. As the car comes to a stop her body lurches forward in the seat until it is restrained by the seatbelt. What law best explains why the driver's body lurches forward when the brakes are suddenly applied?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• The law of gravity

Four students push a block of wood with the forces shown in the diagram. Assume friction is neglible. The block slides horizontally. What is the net force acting on the block of wood?

• 3N to the left

• 8 N to the left

• 11 N to the right

• 25 N to the right

A roller coaster car moves on a roller coaster track through positions W, X, Y, and Z. At what position will the roller coaster car most likeley have the greatest kinetic energy (KE)

• W

• X

• Y

• Z

Which is needed for hurricanes to form off the west coast of Africa?

• very shallow water

• very deep water

• moving water

• warm water

Above is a simplified weather map of the continental United States.

• As a cold front moves, the colder, more dense air moves below the warmer air, and this causes storms.

• As a cold front moves, the colder, more dense air moves above the warmer air, and this causes storms.

• As a cold front moves, the colder, less dense air moves below the warmer air, and this causes storms.

• As a cold front moves, the colder, less dense air moves above the warmer air, and this causes storms.

Which organelle is unique to the plant cell?

• Organelle 3

• Organelle 6

• Organelle 4

• Organelle 7

Which compound machine best describes two levers with cutting edges that are wedges?

• pulley

• ramp

• scissors

• screw

Which is the energy source that drives global convection?

• gravity

• sun

• water

• wind

Which is best described as an inclined plane wrapped around a central cylinder?

• baseball bat

• fishing pole

• pulley

• screw

Which best describes two equal forces that are acting in opposite directions on an object?

• friction forces

• balanced forces

• centripetal forces

• gravitational forces