ALL LESSONS

Question 1

branch of science which deals with the study of matter- its composition, structure, properties, change it undergoes and the energy included in these changes

Answer 1

chemistry

Question 2

matter has atwo types

Answer 2

pure substance and mixture

Question 3

amount of substance

Answer 3

mass

Question 4

anything that occupies space and has mass

Answer 4

matter

Question 5

downward pull of object towards the center of the earth

Answer 5

weight

Question 6

property that is measurable w/o changing the substance

Answer 6

physical property

Question 7

property that can only be observed by changing the type of substance

Answer 7

chemical properties

Question 8

coffee, soft drinks, bronze are examples of

Answer 8

mixture

Question 9

only depends on the type of matter
- boiling pt, freezing pt, melting pt, solubility, malleability, viscosity, taste, hardness, density, luster, color

Answer 9

intensive property

Question 9

the one dissolved

Answer 9

solute

Question 10

oxygen and water are examples of

Answer 10

pure substance

Question 10

only depends on the amount of matter
- height, weight, temp., size, shape, volume, mass

Answer 10

extensive properties

Question 10

separation method used to filter out pure substances in mixtures made up of particles some of which are too large to pass through the filter

e.g: aircon

Answer 10

filtration

Question 11

another word for homogenous mixture, has 2 parts: solvent and solute

Answer 11

solution

Question 11

conversion of kelvin to celcius

Answer 11

c+273.15

Question 12

procedure where a solid and liquid or 2 liquids with diff. boiling points can be separated using the principles of evaporation and condensation

e.g: gasoline from crude oil

Answer 12

distillation

Question 12

process in which a conversion factor writtin in a form of ratio is used to change units givein the data to the units desired

Answer 12

dimensional analysis

Question 12

solution where water is the solvent (aq) next to substance =

Answer 12

aqueous

Question 12

the one that dissolves

Answer 12

solvent

Question 12

quantity of matter in the object

Answer 12

mass

Question 12

components in mixtures have diff. attractions w/chromatography paper: diff components travel up the paper at diff. rates

e.g: blood testing/arson verification/ drug tests/ etc.

Answer 12

chromatography

Question 13

getting the mass/volume/temp of an object

Answer 13

density measurement

Question 13

formula for mass

Answer 13

m = density/volume (TRIANGLE)
M
D V

Question 14

• antoine lavoisier
• in a chemical reaction, no change in mass takes place: total mass of product = total mass of the reactants

Answer 14

law of conservation of mass

Question 14

amount of space occupied by a substance

Answer 14

volume

Question 14

tells how hot/cold an object is

Answer 14

temperature

Question 15

ratio of the mass of an object to the volume it occupies

Answer 15

density

Question 15

conversion of celcius to fahrenheit

Answer 15

1.8c+32

Question 16

conversion of fahrenheit to celcius

Answer 16

f-32/1.8

Question 17

uncertainty arising from uncontrolled variable in measurement causing one measurement to differ slightly from the next like when you move

Answer 17

random error or indeterminate error accurate but not precise

Question 17

machine problems

Answer 17

systematic error precise but not accurate

Question 17

process of determining the extent of dimensions, quantity or extent of something

Answer 17

measurements

Question 17

a compound always contains the same constituent elements

Answer 17

law of definite proportion

Question 17

simple way to keep track of large numbers with lots of zeroes

Answer 17

scientific notation

Question 18

if 2 elements can combine to form more than 1 compound, the masses of 1 element that'll combine with a fixed mass of the other element are in a ratio of small numbers

Answer 18

law of multiple proportion

Question 19

dalton's 2nd atomic theory

Answer 19

atoms of the same element are identical and are different from those of other elements

Question 19

(1809) he published his book: a system of chemical philosophy, where he proposed atomic theory of matter

Answer 19

john dalton

Question 20

dalton's 4th atomic theory

Answer 20

DURING A CHEMICAL REACTION, ATOMS COMBINE, SEPARATE OR REARRANGE. NO ATOMS ARE CREATED AND NO ATOMS DISAPPEAR

Question 20

dalton's 1st atomic theory

Answer 20

matter is made up of extremely small indivisible particles called atoms

Question 21

dalton's 3rd atomic theory

Answer 21

compounds are composed of atoms of more than 1 element, combined in diff. ratios with whole number values

Question 21

when a neutral atom gains or loses 1 or more electrons, it becomes an

Answer 21

ion