Post-Test: Force, Motion, and Energy

What is the effect of an unbalanced force on an object's motion?

• It makes the object stay still.

• It makes the object move at a constant speed in a straight line.

• It changes the object's speed or direction.

Tags

NGSS.MS-PS2-2

If an object is described as traveling at "20 m/s to the east," what property of motion is being described?

• Speed

• Velocity

• Acceleration

A force of 40 N is applied to an object with a mass of 8 kg. What is the acceleration of the object?

• 0.2m/s2

• 5m/s2

• 320m/s2

Tags

NGSS.MS-PS2-2

How do producers obtain their energy?

• By eating other organisms

• By breaking down dead organisms

• By making their own food using sunlight

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What happens to most of the energy transferred between trophic levels in a food chain?

• It is stored entirely in the next organism.

• It is mostly lost as heat during metabolic processes.

• It flows back to the producers.

Which of the following correctly completes the formula for Newton's Second Law of Motion?

• Force = Speed × Time

• Force = Mass × Acceleration

• Force = Energy × Distance

Tags

NGSS.MS-PS2-2

A car is driving around a circular track at a constant speed. Is the car accelerating?

• No, because its speed is constant.

• Yes, because its direction is constantly changing.

• Only if it speeds up or slows down.

What is the primary role of decomposers in an ecosystem?

• To produce new energy from sunlight.

• To consume living organisms for energy.

• To break down dead organisms and recycle nutrients.

Tags

NGSS.MS-LS2-3

Which of these is a way your body uses energy?

• Sleeping for 8 hours.

• Digesting food.

• Watching TV.

Tags

NGSS.MS-LS1-7

In a food chain, which group of organisms forms the base and contains the most energy?

• Consumers

• Decomposers

• Producers

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3