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7th grade human body and health

7th grade (Year 8 in England) · 13 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

    Which part of the blood is described here: contain haemoglobin (hemoglobin) and no nucleus?

    • A. red blood cells
    • B. white blood cells
    • C. platelets
    • D. plasma

  2. Question 2

    Which enzyme is described here: breaks starch down into sugars?

    • A. amylase (a carbohydrase)
    • B. protease
    • C. lipase

  3. Question 3

    Respiration: which statement is NOT true?

    • A. Aerobic respiration releases more energy than anaerobic respiration.
    • B. Plants respire as well as photosynthesise.
    • C. Respiration happens in every living cell.
    • D. Respiration means breathing.

  4. Question 4

    Which two systems work together to deliver oxygen to muscle cells?

    • A. respiratory and circulatory
    • B. digestive and skeletal
    • C. digestive and nervous
    • D. nervous and skeletal

  5. Question 5

    Complete the word equation for aerobic respiration: glucose + oxygen → carbon dioxide + ___

    • A. nitrogen
    • B. oxygen
    • C. water
    • D. lactic acid

  6. Question 6

    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

  7. Question 7

    Yeast was mixed with sugar solution and the gas collected in 10 minutes was measured: 10 °C: 2 cm³ 20 °C: 4 cm³ 30 °C: 13 cm³ 40 °C: 24 cm³ 50 °C: 1 cm³ At which temperature did the yeast respire fastest, in °C?

    Answer°C

  8. Question 8

    Blood vessels: which statement is true?

    • A. All arteries carry oxygen-rich blood.
    • B. Veins have thicker walls than arteries.
    • C. Veins contain valves.
    • D. Capillaries have thick walls to protect the blood.

  9. Question 9

    A piece of bread tastes sweeter after you chew it for a long time. Why?

    • A. Amylase in saliva breaks starch into sugar
    • B. The bread gets warmer
    • C. Chewing adds sugar
    • D. Saliva contains lipase that makes sugar

  10. Question 10

    Why should you wear eye protection when doing the Benedict's test?

    • A. Benedict's solution is radioactive
    • B. The food might explode
    • C. Iodine glows in the dark
    • D. It involves heating in a hot water bath and the reagent is an irritant

  11. Question 11

    Which type of blood vessel: wide space inside and thin walls?

    • A. artery
    • B. vein
    • C. capillary

  12. Question 12

    Food has just left the stomach. Where does it go next?

    • A. anus
    • B. mouth
    • C. small intestine
    • D. oesophagus (esophagus)

  13. Question 13

    A food sample gives this result: ethanol then water gives a cloudy white layer. Which nutrient is present?

    • A. starch
    • B. sugar (reducing sugar)
    • C. protein
    • D. fat (lipid)

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Answer key: 7th grade human body and health

  1. 1. A. red blood cells

  2. 2. A. amylase (a carbohydrase)

  3. 3. D. Respiration means breathing.

  4. 4. A. respiratory and circulatory

  5. 5. C. water

  6. 6. B. glucose → ethanol + carbon dioxide

  7. 7. 40 °C

  8. 8. C. Veins contain valves.

  9. 9. A. Amylase in saliva breaks starch into sugar

  10. 10. D. It involves heating in a hot water bath and the reagent is an irritant

  11. 11. B. vein

  12. 12. C. small intestine

  13. 13. D. fat (lipid)