Reproduction 02
If it wasn't for reproduction, you wouldn't be here!

Reproduction 02

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 boys, during adolescence is NOT true?
    Voice becomes deeper
  2. The fertilised egg starts to divide. At first it is called .......
    The embryo is called a foetus at about nine weeks
  3. Which of the following is NOT true about an egg cell?
    Sometimes two (or more) eggs are released at the same time. When this happens, if they are all fertilised, non-identical twins form
  4. Which of the following does NOT control the menstral cycle?
    Oestrogen causes the uterus lining to thicken, progesterone maintains the lining. Together they control ovulation
  5. Which of the following is NOT true about a sperm cell?
    They live for a very short time
  6. Which of the following is NOT true?
    The two blood supplies NEVER mix but materials are transferred from mother to foetus through the placenta
  7. Which of the following does an implanted fertilised egg NOT need?
    Carbon dioxide is removed as the fertilised egg develops
  8. The physical changes during adolescence occur .......
    The others are all emotional changes which occur as the brain develops from that of a child to that of an adult
  9. Which of the following physical changes, in girls, during adolescence is NOT true?
    Hips get wider
  10. Which of the following does NOT reduce fertility?
    The fertility drug stimulates eggs to mature and be released

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