matter (unit 1)

Question 1

what is matter

Answer 1

it has mass
weight is the force of gravity (newtons)
mass is the amount of stuff (kg)

Question 2

what is volume

Answer 2

amount of free space object occupies
displacement
l x w x h

Question 3

density

Answer 3

mass/volume (g/ml) (m/m^3)

Question 4

types of matter

Answer 4

substance + mixtures

Question 5

substance

Answer 5

compound (h20)- bonded chemically
element (02 -diatomic)- held together by intramolecular forces
separated nuclear/chemically

Question 6

mixture

Answer 6

multiple substances
homogenous- blends smoothly throughout
heterogenous- has phases (layers)
separated physically

Question 7

physical properties

Answer 7

can be measured or seen without changing substance
color, density, viscosity, boiling/freezing point

Question 8

chemical properties

Answer 8

ability of a substance to undergo a specific chemical change
chemical properties can only be observed as the substance is in the process of being changed into a different substance
flammability, toxicity, acidity, reactivity (many types), and heat of combustion

Question 9

physical change

Answer 9

a change to a sample of matter in which some properties of the material change, but the identity of the matter does not
reversible/irreversible
changes of states

Question 10

chemical change

Answer 10

breaking apart/combining compounds into diff substances
burning, digestion, cellular repiration

Question 11

chemical reaction

Answer 11

process that occurs when one or more substances are changed into one or more new substances.
color change, odor, production of gas