Force

Which of the following statements regarding a simple experimental investigation is correct?

• A. Everything remains constant in a simple experimental investigation.

• B. One variable is tested in a simple experimental investigation.

• C. Two variables can be tested in a simple experimental investigation.

• D. Nothing remains constant in a simple experimental investigation.

Students use a spring scale to pull different types of shoes across a wood table and record the amount of force required. Which question is this experimental investigation most likely trying to answer?

• A. How much do the different types of shoes weigh?

• B. How does the type of shoe affect the amount of force required to pull it?

• C. How does a spring scale work?

• D. How much force is required to pull the high heel shoe?

Tags

NGSS.MS-PS2-2

Which of the procedures below would provide the most reliable data?

• A. Pull each type of shoe once and record the results.

• B. Pull each type of shoe twice and record the results of each trial.

• C. Pull each shoe five times and record the results of each trial.

• D. All of the procedures have the same reliability.

Tags

NGSS.MS-PS2-2

Students are designing an experimental investigation where they determine how the height of a ramp affects the speed of a toy car by measuring how long it takes for the toy car to travel down different-sized wood ramps. What other scientific tool do the students need in order to complete this experimental investigation?

• A. Hand lens

• B. Metric ruler

• C. Timing device (stop watch)

• D. Spring scale

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-2

Based on the picture above, what should be done to improve this experimental investigation?

• A. The ramps should all be the same height.

• B. The ramps should be made of different materials.

• C. The same car should be used on both ramps.

• D. The experimental design is correct the way it is.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Why is it important to conduct multiple trials in a simple experimental investigation?

• A. Repeated investigations make the results more reliable.

• B. Repeated investigations make the results less reliable.

• C. Repeated investigations make the results more realistic.

• D. Repeated investigations make the results correct.

Friction is the force between two objects when they come into contact with each other. More friction occurs when an object rubs or move against a _________________________ surface.

• A. Smooth

• B. Rough

• C. Shiny

• D. Flat

The surface of the Moon contains soft dirt. Which object will most likely create a deeper crater when the object strikes the ground?

• A. The bowling ball will make a deeper crater.

• B. The tennis ball will make a deeper crater.

• C. Both craters will be the same depth.

• D. The objects will not make a crater.

Tags

NGSS.MS-PS2-4

When designing a simple experimental investigation that tests the effect of force on an object, why is it important to test one variable at a time?

• A. It would be impossible to test two variables during an experiment involving force.

• B. It allows the experimenter to correctly and more easily interpret the results of the experiment.

• C. It allows the experimenter to formulate a hypothesis both before and after the experiment.

• D. It is not important to test only one variable at a time.

Tags

NGSS.MS-PS2-2

The cyclist is position 4 stops pedaling, but continues to roll down the hill. Which force is pulling the bicycle and rider down the hill?

• A. Friction

• B. Inertia

• C. Gravity

• D. Momentum

Tags

NGSS.MS-PS2-4