D

Students design an experiment to determine how much force is needed to move blocks of wood of different masses across a lab table. Should multiple trials of the investigation always be performed the exact same way? Why or why not?

• No. Different procedures each time will really test the hypothesis.

• No. Using different procedures doesn’t change results.

• It really doesn’t matter.

• Yes. The same procedure should give you the same results.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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 force of a spring using a spring launcher and four spheres with the same diameter but with different masses. What is a reasonable conclusion to this investigation?

• More mass will require more force to launch the ball.

• More mass will require less force to launch the ball.

• Less mass will require more force to launch the ball.

• The mass will have no effect on the amount of force needed to launch the ball.

Tags

NGSS.MS-PS2-2

The diagrams show two trials of an experiment in which a spring scale was used to measure force. What is a reasonable conclusion to this investigation?

• Smoother surfaces will decrease the amount of force.

• More mass will require less force.

• The mass will have no effect on the amount of force needed.

• More mass will require more force.

Tags

NGSS.MS-PS2-2

Students drop the same heavy ball onto identical blocks of soft clay from different heights. For each height they measure the depth of the dent the ball makes in the clay. Why is the depth of the dent different in each trial?

• The size of the ball changes.

• The material of the ball changes.

• The mass of the ball when it hits the clay changes.

• The force of the ball when it hits the clay changes.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Students drop the same heavy ball onto identical blocks of soft clay from different heights. For each height they measure the depth of the dent the ball makes in the clay. What will be different in all of the trials for this investigation?

• Height ball is dropped from

• The mass of the ball

• The type of clay used

• Everything will be the same

Tags

NGSS.MS-PS2-2

What is the chemical symbol for the element with atomic number 1?

• H

• He

• Li

• Be

Which of the following is a unit of force?

• Newton

• Joule

• Watt

• Pascal

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the process by which plants make their food using sunlight?

• Photosynthesis

• Respiration

• Transpiration

• Fermentation

Tags

NGSS.MS-LS1-6