The _____ energy of an object increases with its height.

• chemical potential

• kinetic

• thermal

• gravitational potential

The speed you read on a speedometer is ____.

• instantaneous speed

• constant speed

• average speed

• velocity

Tags

NGSS.MS-PS3-1

A group of students is playing tug-of-war. The students on both sides of the rope are pulling with equal force so that the rope is not moving. This is an example of?

• unbalanced forces

• balanced forces

• acceleration

• displacement

What is the part of an experiment that serves as a standard for comparison?

• control group

• hypothesis

• constant

• variable

An object that has kinetic energy must be

• lifted above Earth's surface

• in motion

• at rest

• changing direction

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A car moves around a wide turn going 45 mi/hr the whole time. The car has a constant _____.

• speed

• velocity

• direction

• acceleration

A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. What is the most likely cause of this?

• the hose material is very realistic

• since the hose is at rest, it tends to stay at rest

• the force exerted on the water equals the mass of the water times its acceleration

• the escaping water exerts an equal and opposite force on the hose

Tags

NGSS.MS-PS2-1

A testable prediction that predicts a cause and effect relationship between variables is a(n)

• analysis

• hypothesis

• observations

• inference

The law of ____ states that energy in a system can change forms but can never be created or destroyed.

• conservation of energy

• consecration of energy

• conversion of energy

• construction of energy

Tags

NGSS.HS-PS3-2

Which of the following is measured in Newtons?

• weight

• momentum

• mass

• acceleration

Tags

NGSS.MS-PS2-4