Q3 PHYSICAL SCIENCE QUIZ BEE

The following are the advantages of using a renewable energy EXCEPT

• it is more efficient

• it has infinite supply

• it reduces air pollution

• it has a diverse energy supply

Energy from sources that will run out

• kinetic

• potential

• renewable

• non-renewable

it involves the rearrangement of the molecular or ionic structure of substance to form a new product

• chemical equilibrium

• chemical reaction

• chemical symbol

• stoichiometry

the maximum amount of product you would expect from a reaction based on the amount of limiting reagent.

• excess reactant

• theoretical yield

• limiting reactant

• product difference

Which of the following choices describes the relationship of the number of moles and mass of reactants and products in a chemical reaction?

• molality

• percent yield

• stoichiometry

• balancing equations

When does a star becomes unstable?

• When it runs out of fuel

• when it contract and expands

• when its core becomes heavy with iron

• when the outer shell is pulled by the gravity from the center

which of the following gases are major components of a star

• carbon and oxygen

• helium and carbon

• hydrogen and carbon

• hydrogen and helium

which is the second most abundant element in the universe?

• Helium

• carbon

• oxygen

• hydrogen

what type of chemical bond holds the atoms of a water molecule together?

• ionic bond

• hydrogen bond

• polar covalent bond

• nonpolar covalent bond

• 0

• 1

• 2

• 3