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7th grade human body and health

7th grade (Year 8 in England) · 14 questions · Common Core: NGSS.MS-LS1-7, NGSS.HS-LS1-7, NGSS.MS-LS1-3, NGSS.HS-LS1-2 · England: KS3 Biology: Gas exchange systems, KS3 Biology: Cellular respiration, KS4 Combined Science: Cell biology

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1
Question 1
You straighten your arm at the elbow to push a door. What do the biceps and triceps do?
- A. biceps contract, triceps relax
- B. triceps contract, biceps relax
- C. both contract
- D. both relax
2
Question 2
Which part of the blood is described here: help blood to clot at a cut?
- A. red blood cells
- B. white blood cells
- C. platelets
- D. plasma
3
Question 3
A student adds iodine to plain water as well as to the food samples. Why?
- A. as a control to compare the colours against
- B. to test the water for protein
- C. to save iodine
- D. to make the iodine stronger
4
Question 4
Bones, joints and muscles: which statement is NOT true?
- A. Muscles can pull but cannot push.
- B. When your biceps contracts, your arm straightens.
- C. Ligaments hold bones together at joints.
- D. Cartilage reduces friction between bones at a joint.
5
Question 5
Blood: which statement is true?
- A. White blood cells are the most common blood cells.
- B. White blood cells help fight infection.
- C. Blood is a single kind of cell.
- D. Platelets carry oxygen.
6
Question 6
Which type of joint lets your shoulder move in almost every direction?
- A. ball and socket
- B. hinge
- C. fixed
- D. pivot only
7
Question 7
Which blood vessel carries oxygen-rich blood from the lungs to the heart?
- A. aorta
- B. vena cava
- C. pulmonary artery
- D. pulmonary vein
8
Question 8
Which word equation shows the respiration happening here: yeast making bread dough rise?
- A. glucose → lactic acid
- B. glucose → ethanol + carbon dioxide
- C. glucose + oxygen → carbon dioxide + water
9
Question 9
Respiration: which statement is NOT true?
- A. Respiration happens in every living cell.
- B. Respiration produces energy from nothing.
- C. Mitochondria are where aerobic respiration happens.
- D. Aerobic respiration releases more energy than anaerobic respiration.
10
Question 10
During hard exercise, muscles may respire without enough oxygen. What do they make?
- A. starch
- B. oxygen
- C. lactic acid
- D. alcohol and carbon dioxide
Question 11
Amylase was mixed with starch at different temperatures. Iodine was used to time how long the starch took to disappear: 20 °C: 10 min 30 °C: 6 min 40 °C: 3 min 50 °C: 9 min 60 °C: starch still present after 20 min At which temperature did amylase work fastest, in °C?
Answer°C
12
Question 12
The stomach contains muscle tissue, glandular tissue and lining tissue. So the stomach is…
- A. an organism
- B. a cell
- C. a tissue
- D. an organ
Question 13
Yeast was mixed with sugar solution and the gas collected in 10 minutes was measured: 10 °C: 8 cm³ 20 °C: 13 cm³ 30 °C: 20 cm³ 40 °C: 13 cm³ 50 °C: 1 cm³ At which temperature did the yeast respire fastest, in °C?
Answer°C
14
Question 14
Climbers living high in the mountains often have more red blood cells. Why is this useful?
- A. Mountains contain more iron
- B. It helps blood clot in the cold
- C. They need more antibodies
- D. There is less oxygen in each breath, so more cells help carry enough

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Answer key: 7th grade human body and health

1. B. triceps contract, biceps relax
2. C. platelets
3. A. as a control to compare the colours against
4. B. When your biceps contracts, your arm straightens.
5. B. White blood cells help fight infection.
6. A. ball and socket
7. D. pulmonary vein
8. B. glucose → ethanol + carbon dioxide
9. B. Respiration produces energy from nothing.
10. C. lactic acid
11. 40 °C
12. D. an organ
13. 30 °C
14. D. There is less oxygen in each breath, so more cells help carry enough