Physical Science Final

How many electrons are found in the outer shell of an atom when the shell is full?

• 4

• 2

• 8

• 5

What is the half- life of an isotope?

• The time required to undergo fussion

• The time required to undergo radioactive decay

• The time required to undergo fission

• The time required to react chemically

What are the three most common states of matter in order by increasing force?

• liquid → solid → gas

• solid → liquid → gas

• gas → liquid → solid

• gas → solid → liquid

A chemical reaction is shown below.

K + MgBr → KBr + Mg

Which chemical reaction shows a reaction that supports the law of conservation of matter?

• 2K + 2MgBr → KBr + 2Mg

• K + 2MgBr → KBr + 2Mg

• 2K + MgBr → 2KBr + Mg

• K + MgBr → KBr + Mg

In a balanced equation which law is displayed?

• The law of conservation of weight

• The law of conservation of force

• The law of conservation of matter

• The law of conservation of heat

What is the chemical formula for salt?

• H₂O

• HClO₃

• NaClO₃

• NaOH

Suppose sand was heated by the sun, what happens to the energy absorbed by the sand if the sun goes down?

• stays in the sand

• it gets destroyed

• It is transferred to the air via the process of radiation.

• it is soaked back up by the sun before it leaves

If you had a gas in water, how could you increase the solubility?

• cooling the solution

• shaking it up

• heating the solution

• it's not possible

If pressure increases on a bicycle tire when heated by the sun, what would happen to the volume?

• decrease

• stay the same

• nothing

• increase

The image demonstrates which of Newton's three laws?

• First Law

• Second Law

• Third Law

• none