7th Grade Science Semester 1 Final

Which of the following is an example of exerting a force?

• a child running through a field

• a train speeding down a track

• a carpenter hammering a nail

• an airplane soaring through the sky

What happens when two forces act in the same direction?

• they cancel each other out

• The stronger one prevails

• they add together

• their sum divided by two is the total force

The tendency of an object to resist change in its motion is known as

• mass

• inertia

• force

• balance

The greater the mass of an object,

• the easier the object starts moving

• the greater it's inertia

• The more balanced it is

• The more space it takes up

The force that one surface exerts on another when the two rub against each other is called

• friction

• acceleration

• inertia

• gravity

Which of the following is an example of rolling friction?

• shoes on a sidewalk as you walk

• bike tires on the road as you ride

• A boat on the water as it sails

• Two hands rubbing together

Air resistance is a type of

• motion

• acceleration

• friction

• gravity

The achievement of lifting a rocket off the ground and into space can be explained by

• Newton's first law

• Newton's second law

• Newton's third law

• The law of conservation of momentum

In physical science, a push or a pull is called a(an)

• force

• kilogram

• acceleration

• inertia

The SI unit for force is the

• newton

• meter

• kilogram

• pound