8th grade final exam

The use of knowledge learned by science is:

• data tables

• a hypothesis

• science

• technology

• variables

A statement about a problem that can be tested:

• data tables

• a hypothesis

• science

• technology

• variables

Factors in an experiment that can change:

• data tables

• a hypothesis

• science

• technology

• variables

A change in speed or direction:

• accelleration

• force

• gravity

• inertia

• average speed

Force that every object in the universe exerts on every other object:

• accelleration

• force

• gravity

• inertia

• average speed

Resistance of an object to a change in movement:

• accelleration

• force

• gravity

• inertia

• average speed

Any push or pull on an object:

• accelleration

• force

• gravity

• inertia

• average speed

Which of the following statements is true?

• The mass of an object always stays the same, but its weight can change?

• The weight of an object always stays the same but its mass can change.

• The mass and weight of an object both stay the same.

• The mass and weight of an object both can change.

Newton's second law states that:

• things don't stop or start by themselves

• for every action there is an equal and opposite reaction force

• acceleration depends on the mass of an object and the force pushing or pulling the object

• the push or pull that opposes motion between two surfaces that are touching each other is called friction

The smallest particle into which an element can be divided and still be the same substance is a(n)

• atom.
• ion.
• alloy.
• isotope.