Unit 3 & 4 Review Questions

A _____ moves an object closer to you.

• push
• pull
• friction
• cat

Tags

NGSS.3-PS2-1

What force moves an object away from you?

• pull
• push
• gravity
• Jedi force

Tags

NGSS.3-PS2-1

Why is person B having a hard time moving down the hill?

• Person B has more friction than person A.
• Person B has the same friction as person A.
• Person B is out of shape.
• Person B has less friction has person A.

Tags

NGSS.MS-PS2-2

The summary at the end of an experiment that explains the results. 

• conclusion
• procedures
• materials
• responding variable

Tags

NGSS.MS-PS1-2

What is an observation?

• A scientific statement based on ideas

• Using your senses to notice what is going on around you

• To be unaware of your surroundings

• The question that you want an answer to.

Tags

NGSS.MS-LS1-8

What is a hypothesis?

• A hypothesis is the right answer to an experiment.

• A hypothesis is the wrong answer to an experiment.

• A hypothesis is a prediction about what I think my experimental outcome will be.

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass. What is a reasonable conclusion to this investigation?

• More mass will require more force to pull it.

• More mass will require less force to pull it.

• Smoother surfaces will decrease the amount of force needed.

• Rougher surfaces will decrease the amount of force needed.

Tags

NGSS.MS-PS2-2

A student designs an experiment to test the force of a spring using a spring launcher and four spheres with the same diameter but with different masses. What question is being asked in this investigation?

• How does the mass of the ball affect the force needed?

• How does the diameter of the ball affect the force needed?

• How does the color of the ball affect the force needed?

• How does the height of launch affect the mass?

Tags

NGSS.MS-PS2-2

A student designs an experiment to test the effect of the width of a piece of elastic on the elastic's ability to stretch. The student selects four pieces of elastic with different widths but the same length. The student then attaches blocks with different masses to the pieces of elastic. The results of the student's experiment are shown below. Why can't we find an answer to this investigation?

• There are 2 variables - elastic width and mass.

• The elastic is too narrow.

• The masses are too heavy.

• You can find an answer using this investigation.

Tags

NGSS.MS-PS2-2

Some students attach a balloon to a straw and then they tape the straw to the top of a toy car. The students inflate the balloon and release the car. The car travels 40 centimeters across the floor. What should the students do to determine whether the force of the air from a balloon is enough to push the car 40 centimeters across the the same floor in repeated trials?

• Test the car several times using an identical balloon filled with different amounts of air.

• Test the car several times using different-sized balloons filled with the same amount of air.

• Test the car several times using an identical balloon filled with the same amount of air.

• Test the car several times using different-sized balloons with different amounts of air.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-PS2-2