Ecosystems

Question 1

Aerobic respiration​

Answer 1

Respiration using oxygen​

Question 2

Anaerobic respiration​

Answer 2

Respiration without oxygen ​

Question 3

Respiration​

Answer 3

Chemical reaction that occurs in cells to release energy from glucose​

Question 4

Limewater​

Answer 4

A chemical that forms a white precipitate when carbon dioxide is bubbled through it​

Question 5

Ethanol​

Answer 5

A type of alcohol produced in anaerobic respiration in plants and yeast​

Question 6

Mitochondria​

Answer 6

Organelles found in (eukaryotic) cells that carry out aerobic respiration​

Question 7

Chloroplast​

Answer 7

Organelles found in plant cells that carry out photosynthesis​

Question 8

Photosynthesis​

Answer 8

Chemical reaction that occurs in plant cells to produce glucose (carbon dioxide + water  glucose + oxygen)​

Question 9

Chlorophyll​

Answer 9

A green pigment in chloroplasts that absorbs light to transfer energy for photosynthesis​

Question 10

Starch​

Answer 10

A large molecule made from lots of stored glucose, produced in photosynthesising plant cells​

Question 11

Iodine​

Answer 11

A chemical that changes colour from brown to blue-black if starch is present​

Question 12

Organelle​

Answer 12

Structures within cells that carry out a specific function, e.g. mitochondria and chloroplasts​

Question 13

Recovery time​

Answer 13

The time taken for a person’s heart rate and breathing rate to return to resting levels after exercise​

Question 14

Oxygen debt​

Answer 14

The amount of oxygen needed after anaerobic exercise in order to break down lactic acid​

Question 15

Lactic acid​

Answer 15

A toxic waste product of anaerobic respiration in mammals. It causes muscle fatigue