physical science mid term studyguide

What do we call variables that are kept constant?

• Independent variables

• Dependent variables

• Control variables

• Random variables

A hypothesis is defined as:

• A proven fact

• An educated guess

• A random idea

• A scientific law

What is the law of conservation of energy?

• Energy can be created and destroyed

• Energy can be transferred and transformed

• Energy is always increasing

• Energy is always decreasing

What charges repel?

• Opposite charges

• Like charges

• Neutral charges

• All charges

A conductor is defined as a material that allows the flow of electricity.

• A material that resists the flow of electricity

• A material that allows the flow of electricity

• A material that blocks magnetic fields

• A material that absorbs light

Where is a magnet the strongest?

• At its center

• At its poles

• Along its sides

• At its base

What poles attract each other?

• North and North

• South and South

• North and South

• East and West

And what poles repel each other?

• North and South

• North and North

• South and North

• East and West

How can a new magnetic field be produced?

• By heating a magnet

• By cutting a magnet in half

• By moving electric charges

• By freezing a magnet

Why does a compass needle rotate when it is brought near a magnet?

• Due to gravitational pull

• Due to magnetic field interaction

• Due to wind direction

• Due to temperature change