KS3 Science Quiz - Reproduction 02 (Questions)

This KS3 Science quiz takes a further look at reproduction. Adolescence is the time when a human's reproductive organs become mature. Puberty is the process of physical changes by which a child's body becomes an adult body capable of reproduction. Boys' and girls' bodies and brains undergo many changes during this time. Everyone's experience of puberty is different - we are all individuals.

Although the changes are very similar for everyone, they will occur at different times for different people and they will be slightly different. As an example, some girls' hips and some boys' shoulders will grow wider than others. That is perfectly normal. These changes are caused by hormones being released by several different glands in our body.

Changes during puberty happen both internally and externally.

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For girls, their ovaries begin to release eggs and they start to menstruate. Their body shape changes - their breasts start to develop, their hips become wider and pubic and underarm hair grows. For boys, their penis and testes grow larger and the testes begin to produce sperm cells. As well as underarm and pubic hair, they grow facial hair too. Their voice deepens and they develop broader shoulders and larger muscles.

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1. Which of the following physical changes, in girls, during adolescence is NOT true?
[ ] Breasts start to develop
[ ] Hips get narrower
[ ] Ovaries start to release eggs
[ ] Pubic and underarm hair grow
2. Which of the following physical changes, in boys, during adolescence is NOT true?
[ ] Facial hair grows
[ ] Muscles and penis grow bigger
[ ] Testes start to produce sperm
[ ] Voice becomes higher
3. The physical changes during adolescence occur .......
[ ] because glands make hormones to start the changes
[ ] because you feel and think differently
[ ] because you have mood swings
[ ] because your emotions change
4. Which of the following does an implanted fertilised egg NOT need?
[ ] Carbon dioxide
[ ] Food
[ ] Oxygen
[ ] Warmth
5. The fertilised egg starts to divide. At first it is called .......
[ ] a baby
[ ] a foetus
[ ] a period
[ ] an embryo
6. Which of the following is NOT true?
[ ] Carbon dioxide passes from the foetal blood to the mother
[ ] Food passes from the mother's blood to the foetal blood
[ ] Oxygen passes from the mother's blood to the foetal blood
[ ] The foetal blood and the mother's blood mix
7. Which of the following is NOT true about a sperm cell?
[ ] It has a tail which moves so it can swim
[ ] The head contains enzymes to make a hole in the egg cell
[ ] The nucleus contains chromosomes
[ ] They live for a long time
8. Which of the following is NOT true about an egg cell?
[ ] It has a massive food store for the developing embryo
[ ] It is much larger than a sperm cell
[ ] One egg is only ever released at a time
[ ] The nucleus contains chromosomes
9. Which of the following does NOT control the menstral cycle?
[ ] A fertility drug
[ ] Oestrogen alone
[ ] Oestrogen and progesterone together
[ ] Progesterone alone
10. Which of the following does NOT reduce fertility?
[ ] Female sex hormone in a fertility drug
[ ] Female sex hormone in an oral contraceptive
[ ] Female sex hormone to prevent ovulation
[ ] Female sex hormone to mimic pregnancy
KS3 Science Quiz - Reproduction 02 (Answers)
1. Which of the following physical changes, in girls, during adolescence is NOT true?
[ ] Breasts start to develop
[x] Hips get narrower
[ ] Ovaries start to release eggs
[ ] Pubic and underarm hair grow
Hips get wider
2. Which of the following physical changes, in boys, during adolescence is NOT true?
[ ] Facial hair grows
[ ] Muscles and penis grow bigger
[ ] Testes start to produce sperm
[x] Voice becomes higher
Voice becomes deeper
3. The physical changes during adolescence occur .......
[x] because glands make hormones to start the changes
[ ] because you feel and think differently
[ ] because you have mood swings
[ ] because your emotions change
The others are all emotional changes which occur as the brain develops from that of a child to that of an adult
4. Which of the following does an implanted fertilised egg NOT need?
[x] Carbon dioxide
[ ] Food
[ ] Oxygen
[ ] Warmth
Carbon dioxide is removed as the fertilised egg develops
5. The fertilised egg starts to divide. At first it is called .......
[ ] a baby
[ ] a foetus
[ ] a period
[x] an embryo
The embryo is called a foetus at about nine weeks
6. Which of the following is NOT true?
[ ] Carbon dioxide passes from the foetal blood to the mother
[ ] Food passes from the mother's blood to the foetal blood
[ ] Oxygen passes from the mother's blood to the foetal blood
[x] The foetal blood and the mother's blood mix
The two blood supplies NEVER mix but materials are transferred from mother to foetus through the placenta
7. Which of the following is NOT true about a sperm cell?
[ ] It has a tail which moves so it can swim
[ ] The head contains enzymes to make a hole in the egg cell
[ ] The nucleus contains chromosomes
[x] They live for a long time
They live for a very short time
8. Which of the following is NOT true about an egg cell?
[ ] It has a massive food store for the developing embryo
[ ] It is much larger than a sperm cell
[x] One egg is only ever released at a time
[ ] The nucleus contains chromosomes
Sometimes two (or more) eggs are released at the same time. When this happens, if they are all fertilised, non-identical twins form
9. Which of the following does NOT control the menstral cycle?
[x] A fertility drug
[ ] Oestrogen alone
[ ] Oestrogen and progesterone together
[ ] Progesterone alone
Oestrogen causes the uterus lining to thicken, progesterone maintains the lining. Together they control ovulation
10. Which of the following does NOT reduce fertility?
[x] Female sex hormone in a fertility drug
[ ] Female sex hormone in an oral contraceptive
[ ] Female sex hormone to prevent ovulation
[ ] Female sex hormone to mimic pregnancy
The fertility drug stimulates eggs to mature and be released