Science revision y9 baseline

Question 1

what is the independent variable?

Answer 1

the independent variable is the variable that you choose to change

Question 2

what is the dependant variable?

Answer 2

the dependant variable is the variable that you measure

Question 3

what are the control variables?

Answer 3

the control variables are the variables you need to keep the same to make it a fair test

Question 4

beaker

Answer 4

comes in different sizes to hold liquids and solids

Question 5

conical flask

Answer 5

can be used for experiments that might splash liquids as they react

Question 6

test tube

Answer 6

a narrow glass tube used for observing reactions

Question 7

boiling tube

Answer 7

wider than a test tube and is used for heating small quantities of liquid

Question 8

bunsen burner

Answer 8

used for heating and igniting substances

Question 9

tripod

Answer 9

made from metal with 3 legs, goes over a bunsen burner, used to support a gauze and enable heating of substances

Question 10

heatproof mat

Answer 10

used to protect the bench from damage when a bunsen burner is used

Question 11

gauze

Answer 11

used on top of a tripod to enable you to place beakers and evaporating basins on

Question 12

stop clock/ stop watch

Answer 12

used to measure time experiments, must not be called a timer in science

Question 13

thermometer

Answer 13

used to measure temperature in 。C

Question 14

measuring cylinder

Answer 14

used to measure the volume of liquids in ml or cm3

1ml = 1cm3

Question 15

balance

Answer 15

used to measure the mass of substances, must not be called weighing scales

Question 16

pipette

Answer 16

used to transfer liquids from one place to another and drop small quantities of liquids

Question 17

evaporating basin/ dish

Answer 17

used to evaporate liquids and leave behind solids

Question 18

clamp, boss and clamp stand

Answer 18

used to hold equipment in place whilst an experiment takes place