Science Worksheet - Multiple Choice Questions

In the absence of any friction or outside forces, a pendulum will swing constantly. Which statement best describes the energy of this pendulum?

• The total energy in the pendulum system is constant.

• All the energy in the pendulum is transformed to kinetic energy.

• Some energy is lost as heat as the pendulum continues to swing.

• At all times most of the energy in the pendulum system is potential energy.

The voltage within a circuit remains constant. Which statement is best supported by Ohm's law?

• Resistance increases as current increases.

• Resistance decreases as current increases.

• Resistance increases as current remains constant.

• Resistance decreases as current remains constant.

Which statement best describes the motion of steam particles as they condense?

• The speed of the particles increases.

• The speed of the particles decreases.

• The speed of the particles slow and eventually stop.

• The speed of the particles continue at the same rate.

Use the diagram below to answer the question. Compass Investigation compass box compass needle N W E S 1. A box is moved past a compass causing the compass needle to move. Which object is most likely inside the box?

• a burning candle

• a sample of liquid water

• a strongly acidic solution

• a circuit with a flowing current

A container of liquid water was placed in a freezer. After several hours, all of the liquid water became solid ice. Which statement best describes the change that occurred in the liquid water?

• The water particles became heavier.

• A different chemical was formed from the water.

• Some of the energy in the water was destroyed.

• The movement of the water particles decreased

Methane and oxygen require an input of energy when they react to produce carbon dioxide and water. The reaction progresses until all the reactants are used. Which statement best describes the energy in this reaction?

• The surroundings of the reaction provide energy to the products.

• The energy of the products is equal to the initial amount of energy.

• The products have less energy than the reactants and heat is released.

• The reactants and products have an equal amount of energy and heat is absorbed.

A student is able to lift a piece of cement using a pulley system. How does using the pulley system make lifting the piece of cement easier?

• it reduces the acceleration of the piece of cement

• it doubles the amount of force needed from the student

• it changes the direction of the force applied by the student

• it divides the mass of the piece of cement into two smaller parts

A student wrapped a wire around a nail. The two ends of the wire were then attached to a battery. What will happen when the student moves steel paper clips close to the nail?

• The steel paper clips will move away from the nail because the nail becomes magnetic.

• The steel paper clips will move toward the nail and away from the battery because the battery no longer has power.

• The steel paper clips will move away from the nail and toward the battery because the battery becomes magnetic.

• The steel paper clips will move toward the nail because electricity flowing through the wire makes the nail magnetic.

A student has four blocks of unknown materials. Which action will best help the student identify the unknown materials?

• find the volume of each block

• measure the mass of each block

• calculate the density of each block

• determine the weight of each block

Which statement best explains the mechanical advantage of using a lever to lift a heavy object?

• The lever reduces the weight of the object.

• The lever reduces the volume of the object.

• The lever reduces the force required to lift an object.

• The lever reduces the total amount of work required to lift the object.