Topic 1

Question 1

composed of only one type of atom

Answer 1

elements

Question 2

examples of elements

Answer 2

aluminum, gold, oxygen (pretty much anything on the periodic table I think)

Question 3

2 or more atoms held together by chemical bonds

Answer 3

molecules

Question 4

substances made of 2 or more elements that are chemically bondnd in a set ratio

Answer 4

compounds

Question 5

heterogenous mixture —–

Answer 5

mixed together, seee specific parts

Question 6

heterogenous examples —–

Answer 6

salsa, soup, cereal

Question 7

homogenous examples ——

Answer 7

water, flour, drinks

Question 7

homogenous ——-

Answer 7

very hard/impossible to tell the difference between parts

Question 7

quality of something to be shaped without breaking (hitting a metal sheet)

Answer 7

malleable

Question 8

mass of a material in a given volume

Answer 8

density

Question 9

fluids (gas/liq.) resistance to change into shape or movements

Answer 9

viscolotitity

Question 10

resistance to permanent indintation

Answer 10

hardness

Question 11

ability to sustain intense plastic deformation

Answer 11

ductile

Question 12

diff. between chemical and physical properties

Answer 12

physical can be seen without changing the composition / substance

Question 13

distillation —–

Answer 13

separating liquid by boiling them

Question 14

measure of how quickly something will be caught on fire

Answer 14

flammability

Question 15

ability to undergo a chemical change

Answer 15

reactiviness

Question 16

ways to identify a chemical change (4)

Answer 16

• color change
• release of gas
• release of light, sound, heat
• formation of a percipitant

Question 17

how does temp. change density

Answer 17

temp up dense down
temp down dense up

Question 18

what’s the dentist will water gets (at which temp)

Answer 18

4 degrees then starts going down again

Question 19

elements are identified by —–

Answer 19

letter symbole on periodic table

Question 20

positive center surrounded by neutrons

Answer 20

atom

Question 21

molecular are made of non-metals or metals

Answer 21

non-metals

Question 22

way a substance reacts with oxygen

Answer 22

flammability

Question 23

also study things in quiz 1-1,2,3

Answer 23

be smart

Question 24

endothermic

Answer 24

reactions where energy is absorbed

Question 25

exothermic

Answer 25

energy is released