4th Grade Checkpoint #2 Review

Which of the following is a simple machine?

• a computer

• a coffee maker

• a lever/ shovel

• a car

Which of the following best describes a simple machine?

• A tool that uses electricity to work.

• A device that makes work easier by changing the direction or amount of force.

• A complex machine with many moving parts.

• A type of computer used for calculations.

What is required for sound to be produced?

• Vibrations in a medium (like air, water, or solids)

• A light source

• High temperatures

• Electrical Energy

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which of the following is an example of a transparent object?

• A frosted window

• a clear glass of water

• a wooden door

• a piece of cardboard

Tags

NGSS.MS-PS4-2

John has a flashlight. He wants to test to see which objects would light pass through more easily. He shines the flashlight through a piece of paper and could see it slightly. He then shined the light through a piece of wood and couldn't see any light. What should be John's conclusion?

• Light rays can't travel through some materials.

• All light rays can travel through any material.

• The flashlight wasn't working.

• The piece of paper must be opaque.

Tags

NGSS.MS-PS4-2

What simple machine can be used to split things apart and also it can hold open a door?

• Lever
• Pulley
• Wedge
• Screw

In which type of material do sound waves travel the fastest?

• In gases, like air

• In liquids, like water

• In solids, like metal

• In a vacuum, where there is no matter

Tags

NGSS.MS-PS4-2

Why do sound waves travel faster in solids than in liquids or gases?

• Solids are heavier than liquids and gases.

• The particles in solids are closer together, allowing sound to pass through more quickly.

• Solids have more space for sound waves to move.

• Sound does not travel through solids at all.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which of the following statements correctly describes the difference between a translucent object and a transparent object?

• A translucent object allows all light to pass through clearly, while a transparent object allows some light to pass through but not clearly.

• A translucent object allows some light to pass through but not clearly, while a transparent object allows all light to pass through clearly.

• A translucent object does not allow any light to pass through, while a transparent object allows some light to pass through.

• A translucent object reflects light, while a transparent object absorbs all light.

Tags

NGSS.MS-PS4-2

Carlos and Mia are pulling two identical wagons that each have the same size, shape, and weight. Carlos pulls his wagon with twice as much force as Mia. What happened to Carlos's wagon?

• Carlos's wagon moved slower than Mia's wagon.

• Carlos's wagon did not move at all.

• Carlos's wagon moved faster than Mia's wagon.

• Both wagons moved at the same speed.

Tags

NGSS.MS-PS2-2