What happens when a photon passes by an atom inside a laser?

• The photon is absorbed by the atom.

• The atom emits another photon, joining the first.

• The atom changes its energy state and disappears.

• The photon changes color.

How does a fan cool you down?

• It cools the air itself before it reaches you.

• It creates a breeze that causes sweat on your skin to evaporate.

• It replaces warm air with naturally cooler air from outside.

• It generates cold air through a chemical reaction.

What are the two primary ways glue works to stick things together?

• Chemical bonding and thermal fusion.

• Adhesion and cohesion.

• Mechanical locking and molecular attraction.

• Surface tension and electrostatic discharge.

What is the relationship between cement and concrete?

• Cement is a type of concrete.

• Concrete is an ingredient of cement.

• Cement is an ingredient of concrete.

• They are two different names for the same material.

How many satellites are needed for a phone to pinpoint its exact location using GPS?

• One

• Two

• Three or more

• None, GPS uses cell towers.