biology, chemistry, physics

Question 1

nucleus?

Answer 1

controls the cells activity

Question 2

mitochondria?

Answer 2

this is where aerobic respiration takes place

Question 3

choloroplast?

Answer 3

this is where photosynthesis occurs

Question 4

permanent vacuole?

Answer 4

where the cell sap is stored

Question 5

ribosomes?

Answer 5

where the protein is made

Question 6

cytoplasm?

Answer 6

where the chemical reactions take place

Question 7

cell wall?

Answer 7

supports the cell

Question 8

cell membrane?

Answer 8

controls what goes in and out of the cell

Question 9

plasmid?

Answer 9

circular loop of dna

Question 10

prokaryotic cell?

Answer 10

cell with no nucleus

Question 11

eukaryotic cell?

Answer 11

cell with a nucleus

Question 12

sperm cell?

Answer 12

passes on biological information by swimming towards to egg cell (this is called fertilization)

Question 13

red blood cell?

Answer 13

contains protein that helps carry oxygen from lungs to the rest of the body and has no nucleus

Question 14

egg cell?

Answer 14

reproduces offsprings

Question 15

nerve cell?

Answer 15

have long fibre called axon that can carry messages to your brain

Question 16

muscle cell?

Answer 16

muscle contraction

Question 17

root hair cell?

Answer 17

absorbs water and mineral from plants

Question 18

specialised cell?

Answer 18

a cell that has a specific job to carry out

Question 19

magnification?

Answer 19

enlarging a physical apperance

Question 20

compounds?

Answer 20

contains 1 type of element chemically bonded together

Question 21

elements?

Answer 21

contains 1 type of element

Question 22

chromotography?

Answer 22

separation of solutes in a solvent

Question 23

what does chromatography separate?

Answer 23

colour dyes

Question 24

how do you carry out chromatography?

Answer 24

• put spots of dye on chromatography paper
• dye would travel up the paper
• the separation can be told by the RF value

Question 25

how do you work out the RF value?

Answer 25

distance moved by substance//distance moved by solvent

Question 26

what colour does the litmus paper go if chlorine is present?

Answer 26

white, it would get bleached

Question 27

2 phases of chromatography?

Answer 27

measuring phase (measuring the RF VALUE) and separating phase (separating the dyes)

Question 28

how do you test for oxygen?

Answer 28

• use a glowing splint
• insert into test tube
• the splint with relight if oxygen is present

Question 29

how do you test for chlorine gas?

Answer 29

blue litmus paper bleaches white if chlorine is present

Question 30

how do you test for carbon dioxide?

Answer 30

limewater turns milky if hydrogen gas is produced

Question 31

how do you test for hydrogen gas?

Answer 31

place a lighted splint in test tube. if hydrogen is present it produces a squeaky pop sound

Question 32

what is active transport?

Answer 32

movement of particles

Question 33

what is osmosis?

Answer 33

movement of water from a low concentration to a high concentration

Question 34

what is mitosis?

Answer 34

-cell division

Question 35

what is a pure substance?

Answer 35

made of 1 atom and 1 particle

Question 36

how can you distinguish a pure substance from a impure substance?

Answer 36

the boiling point and the melting point

Question 37

what is a formulation?

Answer 37

a mixture that is useful

Question 38

what are everyday formulations?

Answer 38

• paint
• food
• medicine
• fuels
• fertilisers
• alloys

Question 39

describe how sodium thiosulfate can react with hydrochloric acid in a practical?

Answer 39

flash is put over a paper with a large x
once the reactants are mixed, the x will start to disappear
time it
the reaction should look black

Question 40

what is a catalyst?

Answer 40

a substance that changes the speed of a reaction but doesn’t affect the reaction

Question 41

a reversible reaction is endothermic in one direction and …

Answer 41

exothermic in the other

Question 42

on a graph if there’s curve it means…

Answer 42

the reaction slowed down

Question 43

what does it mean if a reaction is in equilibrium?

Answer 43

the position moves

Question 44

what happens to particles if they are heated?

Answer 44

they get more energetic