organism

Question 1

if iron and sulfur are mixed, iron can be separated by using a …

Answer 1

magnet

Question 2

if iron and sulfur are heated they are chemically bonded and is now a compound called …. …..

Answer 2

iron sulfide

Question 3

helium is …… than air

Answer 3

lighter

Question 4

a particle diagram can represent a solid element, liquid element or a ….. element

Answer 4

gaseous

Question 5

gas exchange happens in the

Answer 5

alveoli

Question 6

alveolis are small and covered in ……

Answer 6

capillaries

Question 7

when u breathe in ur ribs move up and

Answer 7

out

Question 8

breathing in ur diaphragm contracts and

Answer 8

flattens

Question 9

breathing out ur ribs go down and

Answer 9

in

Question 10

diaphragm relaxes into a …… shape

Answer 10

curved

Question 11

breathing out the ….. decreases and ….. increases

Answer 11

volume , pressure

Question 12

lungs do inspiration and

Answer 12

expiration

Question 13

pressure ….. when volume decrease

Answer 13

increases

Question 14

educed elasticity = difficult

Answer 14

exhaling

Question 15

intercostal muscle helps contract and

Answer 15

relax

Question 16

asthmatic= smaller lung….

Answer 16

capacity

Question 17

asthamtic = bronchioles

Answer 17

tighten and become narrower

Question 18

depressants slow ……. signal from body to brain

Answer 18

electrical

Question 19

lipids have a layer of ……. under skin

Answer 19

insulation

Question 20

protein repairs body…. and makes new …..

Answer 20

tissue, cells

Question 21

fibre helps gut move…..

Answer 21

food

Question 22

energy is measured in

Answer 22

KJ

Question 23

nutrients pass into blood through walls of small …… . smalll …… absorb them thru …..

Answer 23

intestines x2 , villi

Question 24

nutrients pass into blood through walls of small …… . smalll …… absorb them thru …..

Answer 24

intestines x2 , villi

Question 25

digetive enzymes

Answer 25

carbohydrases, lipase, protease