Wave Characteristics

The weak forces affects _____.

• quark particles

• charged particles

• repulsive particles

• particles with mass

The strong force is responsible for _____​ and _____​.

• fusion

• fission

• radioactive decay

• repulsion

• attraction

If atoms are the building blocks of matter, then the universal forces are the _____.

• cement

• molecules

• photons

• quarks

Weightlessness is due to _____.

• lack of gravity

• presence of air

• balance of forces

• low pressure

How many masses are needed to have gravity?

• one mass

• two masses

• three masses

• four masses

Weight is _____.

• a measure of the force of gravity on an object

• a measure of the amount of matter in an object

• a measure of the amount of space an object takes up

• a measure of the amount of energy an object has

Like particles _____ and opposite particles _____.

• attract, repel

• repel, attract

• move, stop

• stop, move

Charged particles are responsible for much of the cellular _____ in the world.

• energy

• movement

• replication

• growth

An object becomes charged because there is _____.

• an imbalance of protons and electrons

• an equal number of protons and electrons

• a lack of protons

• a lack of electrons

Earth's core depends on the ____ force to stay molten.

• weak

• strong

• magnetic

• electromagnetic