Category 2 Review 2020

A portable game player stops working because the batteries are dead. What type of energy does the game player need to begin working again?

• mechanical energy

• thermal energy

• sound energy

• electrical energy

In an activity, students are given a circuit diagram. Which statement explains why the buzzer will NOT sound when the switch is open?

• Sound energy from the buzzer cannot travel through the open switch.

• Electrical energy produced by the switch cannot travel through the opening to produce sound energy.

• Sound energy from the battery cannot travel to the buzzer through the open switch.

• Electrical energy from the battery cannot travel through the open switch to produce sound energy.

What do all the objects below have in common?

• They all refract light.

• They all reflect.

• They are all conductors.

• They all make objects appear smaller.

Students investigate motion with toy cars and ramps. The students build two ramps. The fi rst ramp is 12 centimeters high and the second ramp is 25 centimeters high. The students release a car from the top of each ramp and measure the distance the car travels. Which of the following results is most likely to happen?

• The car rolling down Ramp 1 will travel farther than the car rolling down Ramp 2.

• The car rolling down Ramp 2 will travel farther than the car rolling down Ramp 1.

• Both cars will travel the same distance.

• Both cars will travel down the ramp at the same speed.

A boy pushes a cart across the floor. What is the push most likely to change?

• The mass of the cart

• The shape of the cart

• The position of the cart

• All of the above

Which kind of energy is produced by the bulb in the circuit?

• electrical

• mechanical

• light

• sound

Students are asked to construct a graphic organizer to assist with organizing data on a study of light. Which of the following is needed to complete the graphic organizer?

• wooden boat

• camera

• shoebox

• mirror

Students drop a marble into a pan of flour from different heights. For each height, they measure the depth of the crater made in the flour. Which tool would be best for measuring the depth of the craters?

• meter stick

• metric ruler

• hand lens

• graduated cylinder

A student watches a ball roll off the table. What causes the ball to begin motion?

• the force of gravity

• a pulling force

• a pushing force

• an object at rest

Which investigation will best test this statement?

• Build ramps and cover with materials like wax paper, foil, sandpaper, or carpet. Roll a ball down each ramp using the same amount of force.

• Cover flat surfaces with different materials like carpet, silk, cotton, or wool. Roll a ball across each surface using different amounts of force.

• Build ramps and cover with carpet or sandpaper. Roll a ball down each ramp using diff erent amounts of force.

• Cover a flat surface with silk and a ramp with cotton. Roll a ball across each using the same amount of force.