Unit 3 - Getting the energy the body needs 2

Question 1

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

Answer 1

Energy

Question 2

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

Answer 2

Respiration

Question 3

A simple sugar molecule

Answer 3

Glucose

Question 4

Respiration that involves oxygen

Answer 4

Aerobic respiration

Question 5

The starting substance in a chemical reaction

Answer 5

Reactant

Question 6

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

Answer 6

Photosynthesis

Question 7

A substance formed from a chemical reaction

Answer 7

Product

Question 8

Beginning to grow into a plant from a seed

Answer 8

Germinating

Question 9

The structures in a cell that produce energy

Answer 9

Mitochondria

Question 10

The layer around the cell that control substances entering and leaving the cell

Answer 10

Membrane

Question 11

A substance that enables a chemical process in a living organism

Answer 11

Enzymes

Question 12

A group of organs that together enable the digestion of food

Answer 12

Digestive system

Question 13

Takes oxygen into the body and passes carbon dioxide out

Answer 13

Breathing system

Question 14

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

Answer 14

Circulatory system

Question 15

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

Answer 15

Phloem

Question 16

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

Answer 16

Stomata

Question 17

Respiration without using oxygen

Answer 17

Anaerobic respiration

Question 18

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

Answer 18

Lactic acid

Question 19

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

Answer 19

Oxygen debt

Question 20

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

Answer 20

Glycogen

Question 21

Type of anaerobic respiration that produces ethanol and carbon dioxide

Answer 21

Fermentation

Question 22

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

Answer 22

Microbe

Question 23

A unicellular (single celled) fungus

Answer 23

Yeast

Question 24

Cereal grains are soaked in water and fermented with yeast

Answer 24

Brewing

Question 25

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

Answer 25

Fossil fuel

Question 26

A variable in an experiment that affects the outcome and is changed

Answer 26

Independent variable

Question 27

The variable that is measured in an investigation

Answer 27

Dependent variable

Question 28

Substance that speeds up a chemical reaction

Answer 28

Catalyst