Science QA #2 Review

Front

What does it mean if an object floats in water?

Back

It means the object is less dense than the water.

Front

What material can Sandy add to her skateboard to increase friction?

Back

Sandy can add sandpaper to her skateboard.

Front

What is the purpose of using a spring scale in an experiment?

Back

To measure the force needed to move an object.

Front

How do different surfaces affect the amount of force needed to move a block?

Back

Different surfaces create different amounts of friction, affecting the force required.

Front

What must a student do to use a hotplate in a science investigation?

Back

The student must plug in the hotplate and turn the switch to the 'on' position.

Front

What is density?

Back

Density is the mass of an object divided by its volume.

Front

What is friction?

Back

Friction is the resistance that one surface or object encounters when moving over another.

Front

What is the role of a spring scale?

Back

A spring scale measures the weight or force exerted on it.

Front

What happens to light when it hits a mirror?

Back

Light reflects off a mirror, changing direction.

Front

What is an electrical circuit?

Back

An electrical circuit is a closed loop that allows electricity to flow.