5.6D Forces

A student observes that the craters on the moon are different sizes. The student designs an experiment to study the formation of craters. The materials for the experiment are marbles and a pan of flour. The student makes a hypothesis that the size of the craters made on the surface of the flour will depend on the height from which the marble is dropped. Some of the steps in the student's experiment are described below. In this investigation, what will be the variable?

• Mass of the ball.

• Type of flour in the pan.

• Size of the crater.

• The height the ball is dropped.

Tags

NGSS.MS-PS2-2

NGSS.MS-ETS1-1

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 question could we use this investigation to answer?

• How does the mass of the ball affect the size of the crater?

• How does the height affect the size of the crater?

• How does magnetism affect the size of the crater?

• How does the type of clay affect the size of the crater?

Tags

NGSS.MS-PS3-2

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

The diagrams show two trials of an experiment in which a spring scale was used to measure force. In the investigation, the students are testing to see if ____ has an effect on the force needed to move the book.

• Friction

• Angle of Incline

• Mass

• Density

Tags

NGSS.MS-PS2-2

Students design an experiment to determine how much force is needed to move blocks of wood of different masses across a lab table. What is the variable that should change this investigation?

• Spring Scale

• Surface of the table

• Mass of wood block

• Speed the block is moved

Tags

NGSS.MS-PS2-2

Students design an experiment to determine how much force is needed to move blocks of wood of different masses across a lab table. What is the question the students are trying to answer?

• How much force is needed to move the block?

• How does the mass affect the force needed?

• How does the surface affect the force needed?

• How does the type of wood affect the force needed?

Tags

NGSS.MS-PS2-2

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-PS2-2

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 design an experiment to determine how much force is needed to move blocks of wood of different masses across a lab table. Which procedure should students include in their design?

• Conduct five trials, using a different scale to pull each block of wood

• Conduct five trials, pulling a different side of each block each time

• Conduct five trials, using a different table for each trial

• Conduct five trials, pulling each block of wood in the same way for each trial

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. What should the student do to improve this experiment?

• Use blocks of equal mass on the four pieces of elastic

• Use blocks with enough mass to cause the four pieces of elastic to break

• Use more than four pieces of elastic and four blocks

• Use four pieces of elastic with different lengths but the same width

Tags

NGSS.MS-ETS1-3