Science Review 3

An unbalanced force causes:

• change in mass
• acceleration
• balanced forces
• change in time

Tags

NGSS.MS-PS2-2

What is a force?

• a push or pull
• speed or acceleration 
• potential or kinetic energy
• balanced or unbalanced force

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

5. An experiment is conducted to measure the amount of force required to push a square cardboard box from one side of the room to the other side. What variable is likely to lessen the force required?

• A. Adding several heavy weights to the box

• B. Tipping the box onto its side

• C. Adding another box on top

• D. Placing the box onto a wheeled cart

Tags

NGSS.MS-PS2-2

What measurements are needed to calculate the speed of an object?

• grams and force
• force and acceleration
• mass, time. and force
• time and distance

Tags

NGSS.MS-PS3-1

Choose the BEST example of balanced forces.

• a car speeding up
• a leaf blowing in the wind
• a car moving at a constant speed
• a tennis ball bouncing back and forth between players.

Tags

NGSS.MS-PS2-2

What can cause a moving object to increase its speed in a forward direction?

• a force pushing on the object from the opposite direction

• force that moves continuously in the same direction as object

• an increase in the mass of the object

Tags

NGSS.MS-PS2-2

A pencil falls off of a desk. What moves the pencil toward the floor?

• mass

• friction

• gravity

• speed

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A model car travels 20 meters in 15 seconds. How many meters will it travel in 45 seconds?

• 0.4m

• 25m

• 30m

• 60m

Which is a correct statement about the object shown in Graph W?

• The object speeds up during the trip.

• The object slows down during the trip.

• The object travels at a constant speed during the trip.

Tags

NGSS.MS-PS3-1

Tug of war is an example of what kind of force.

• typical force
• normal force
• balanced force
• direct force

Tags

NGSS.MS-PS2-1