Atomic Theory
What two subatomic particles are found in the nucleus?
Protons and Neutrons
What is Biology?
the study of life
What is the formula for density
D=m/v
What is the chemical symbol for Carbon
C
melting
What is the mass of an electron
Zero
What part of the earth is the hydrosphere?
Water
If an object has a density of 0.5 will it float or sink when placed in water?
Float
What is the atomic mass of Oxygen
16
What is the phase change called going from a gas to a liquid
condensation
What subatomic particle determines what element it is?
Protons
Where does cellular respiration occur?
The mitochondria
If a student wanted to find the volume of an irregularly shaped object, what technique could they use?
Water displacement
What group is Krypton found in?
18
if an substance freezes, is that a physical or chemical change?
physical
What did the gold foil experiment determine?
That atoms are mostly empty space and there is a small dense nucleus in the middle.
What is Pangea?
A giant supercontinent that combined almost all of Earth's landmasses into a single piece around 335 mya.
What is the difference between precision and accuracy?
Precision is getting results close together and accuracy is getting the correct answer.
What period is Potassium Found in?
4
What is it called when a substance goes from a solid to a gas
Who first proposed the idea of the atom in ancient Greece?
democritus
What is the formula for photosynthesis?
6CO2 + 6H20 + Light ---> C6H1206 + 602
If a student found the mass of an object to be 5 grams but the actual mass is 7 grams what is the % error of their results?
-28%
Name one of the two elements that is a liquid at STP
Mercury or Bromine
What is it called when a substance goes from a gas to a solid
deposition