science test

Question 1

what is an independant variable

Answer 1

the variable that you change

Question 2

what is the dependant variable

Answer 2

the one you measure

Question 3

how do you start a hypothesis

Answer 3

if……then…..

Question 4

how do you start the aim

Answer 4

to investigate

Question 5

what is the conclusion for

Answer 5

to say if your hypothesis was correct or not

Question 6

what are some thing you can talk about in the discussion

Answer 6

if your test was fair, valid, accurate, if you made any mistakes ,anomalies, averages improvements, if it was reliable, how many trials, trends

Question 7

what do materials do you use for science.

Answer 7

pencil, ruler, measurements, units

Question 8

what are the three stataes of matter

Answer 8

solid liquid gas

Question 9

what do the particles look like with solid liquid gas

Answer 9

solid-tightly pack liquid- a little bit spread out gas-very spread out

Question 10

do solid liquid gas have a fixed shape

Answer 10

solid-yes liquid-no gas-no

Question 11

do solid liquid gas have a fixed volume

Answer 11

solid-yes liquid-yes gas-no

Question 12

can solid liquid gas be compressed

Answer 12

solid-no liquid-no gas-yes

Question 13

what is boiling point

Answer 13

when you are boiling something and it reaches a point where is changes states

Question 14

what is melting point

Answer 14

when you are melting something and it gets to point where it changes state

Question 15

what is the process of turning a solid to a gas

Answer 15

sublimation

Question 16

what is the process of turning a gas to a solid

Answer 16

deposition

Question 17

how do you find density

Answer 17

mass divided by volume

Question 18

what is a molueule

Answer 18

the same atoms bonded together

Question 19

whats a compound

Answer 19

different atoms bonded together

Question 20

what does dilute mean

Answer 20

dilute is less particles of solute

Question 21

whats does concentrated mean

Answer 21

concentration is lots of solute particles

Question 22

whats does saturation mean

Answer 22

when no more solute will dissolve

Question 23

what is the solvent

Answer 23

the liquid

Question 24

what is the solute

Answer 24

the substance

Question 25

whats evaportion

Answer 25

when a substance reaches its boling point and changes form liquid to gas

Question 26

what is crystallisation

Answer 26

evaporating the solvent and leaving behind the solute is called crystallisation

Question 27

whats chromatography

Answer 27

chromatography is the technique used for separating a mixture of pigments based on there solubility

Question 28

whats filtration

Answer 28

filtration is separating solids from liquids through filter paper

Question 29

whats sedimentation

Answer 29

sedimentation is the process of allowing particles to settle out of suspensions through gravity

Question 30

whats decantation

Answer 30

its separating a liquid from a solid by removing the liquid from the top

Question 31

whats centrifuging

Answer 31

centrifuging is when you spin a mixture and it separates the solid and liquid that wont seperate on its owns