Physical Science CRCT Review

4th Grade

Carver Elementary

1. You have three boxes. Their masses are 100 grams, 500 grams, and 1,000 grams. Which has the greatest gravitational force?

A. The 100-gram box

B. The 500-gram box

C. The 1,000-gram box

D. None of them. They all

have the same weight.

2. Tony is pushing a box across the floor. Marta is pushing on the box with equal force, but in the opposite direction. What is the outcome?

A. Tony pushes the box toward Marta.

B. Marta pushes the box toward Tony.

C. The box stays in the same place.

D. The box moves twice as quickly.

3. A homeowner wants to install a skylight to get as much light as possible into a dark upstairs hallway. What kind of glass should she use?

A. Mirrored

B. Opaque

C. Translucent

D. Transparent

Use the graph below to answer question 4.

4. The graph shows the number of vibrations per second for four different sounds. Order the sounds from highest pitch to lowest pitch.

A. B, C, A, D

B. A, B, D, C

C. D, A, C, B

D. A, C, D, B

02,0004,0006,0008,000

10,00012,00014,00016,00018,00020,000

So

un

d A

So

un

d B

So

un

d C

So

un

d D

5. An object that does not vibrate cannot produce.

A. Light

B. Heat

C. Electricity

D. sound

6. You stand in front of a window. A friend waves to you from outside. Why can you see your friend clearly?

A. The glass is a prism.

B. The glass is translucent.

C. The glass is opaque.

D. The glass is transparent.

7. What happens if you shine a flashlight on a mirror in a dark room?

A. The light causes the mirror to get warm.

B. The mirror reflects the light back to you.

C. The light passes through the mirror.

D. The mirror absorbs all the light.

8. Which of these is a concave lens?

A. B.

C. D.

9. A musician plucks two guitar strings. One makes a lower pitched sound. What is true of that string?

A. It is shorter than the other string.

B. It vibrates more slowly than the other string.

C. It produces more energy than the other string.

D. It moves faster than the other string.

10. Which of these simple machines is also an inclined plane?

A. Pulley

B. Lever

C. Screw

D. Wheel-and-axle

11. How many forces must be applied to make a simple machine work?

A. One

B. Two

C. Three

D. four

12.The table shows the mass of four objects and the amount of force applied to each. Which object will probably move the fastest?

Object Mass

(in kilograms)

Force Applied

(in Newtons)

1 10 40

2 20 40

3 30 50

4 50 55

A. Object 1 B. Object 2

C. Object 3 D. Object 4

13. What simple machine opens draperies or blinds when you pull a cord?

A. Screw

B. Lever

C. Inclined plane

D. pulley

14. If an opaque object reflects nearly all visible light, it looks

A. White

B. Black

C. Transparent

D. Multicolored

15. What factors affect the strength of the gravitational attraction between two objects?

A. Mass and acceleration

B. Mass and distance

C. Acceleration and force

D. Force and mass

Use the diagram to answer question 16.

16. Light travels from point 1. It strikes a surface at point 2. If it is reflected in the direction of C, then which of the following is true?

A. The surface is transparent.

B. The surface is a mirror.

C. The surface is convex.

D. The surface is translucent.

Light

AB

C

D

1

2

17. Which of the following tools contains two levers?

A. B.

C. D.

18. Which two simple machines are MOST alike?

A. Screw and lever

B. Lever and wedge

C. Pulley and wheel-and-axle

D. Screw and inclined plane

19. Which of the following would be the BEST simple machine to us to slice celery?

A. Wedge

B. Pulley

C. Screw

D. Inclined plane

20. Why can you see colors in the sky on a rainy day?

A. Raindrops act like convex lenses.

B. Raindrops act like concave lenses.

C. Raindrops act like prisms.

D. Raindrops act like rainbows.