yr 8 key words test 1 respiration

Question 1

energy

Answer 1

something has energy if it has the ability to make something happen when that energy is transferred

Question 2

respiration

Answer 2

the process of living things in which oxygen is used to release the energy in food

Question 3

glucose

Answer 3

a simple sugar molecule

Question 4

aerobic respiration

Answer 4

respiration that involves oxygen

Question 5

reactant

Answer 5

the starting substance in a chemical reaction

Question 6

photosynthesis

Answer 6

the process by which energy from sunlight, carbon dioxide and water are used by green plants to produce glucose and oxygen

Question 7

product

Answer 7

a substance formed from a chemical reaction

Question 8

germinating

Answer 8

beginning to grow into a plant from a seed

Question 9

mitochondria

Answer 9

the structures in a cell that produce energy

Question 10

enzymes

Answer 10

a substance that enables a chemical process in a living organism

Question 11

digestive system

Answer 11

a group of organs that together enable the digestion of food

Question 12

breathing system

Answer 12

takes oxygen into the body and passes carbon dioxide out

Question 13

circulatory system

Answer 13

the heart and blood vessels that transport essential substances around the body in blood

Question 14

phloem

Answer 14

a tissue made up of long tubes that transport glucose made in leaves of a plant to other parts

Question 15

stomata

Answer 15

tiny pores on the underneath surface of a leaf through which gases can move in and out

Question 16

anaerobic respiration

Answer 16

respiration without using oxygen

Question 17

lactic acid

Answer 17

a substance produced in a anaerobic respiration which builds during vigorous exercise and causes an aching or burning feeling in the muscles

Question 18

oxygen debt

Answer 18

the oxygen needed to break down lactic acid produced as a result of vigorous exercise

Question 19

glycogen

Answer 19

a storage molecule formed from a chain of glucose units and often stored in the liver

Question 20

fermentation

Answer 20

type of anaerobic respiration that produces ethanol and carbon dioxide

Question 21

microbe

Answer 21

tiny organisms like bacteria, fungi and viruses that can only be seen by a microscope

Question 22

yeast

Answer 22

unicellular (sing celled) fungus

Question 23

brewing

Answer 23

cereal grains are soaked in water and fermented with yeast

Question 24

fossil fuel

Answer 24

coal, natural gas and oil that were formed from the compressed remains of plants and other organisms that died millions of years ago

Question 25

independent variable

Answer 25

a variable that affects the outcome and is changed

Question 26

dependant variable

Answer 26

the variable that is measured in an investigation

Question 27

catalyst

Answer 27

substance that speeds up a chemical reaction

Question 28

membrane

Answer 28

the layer around a cell that controls substances entering and leaving the cell