Human Life Stages · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

The stages of a human life

Science · Organisms & Life Processes · ages 9-10
Name ______________________   Date ____________

  1. Which stage comes first in a person's life?

    • Toddler
    • Baby
    • Child

  2. Put the stages in order. Which stage comes right after 'child'?

    BabyToddlerChild___AdultElderly
    • Teenager
    • Toddler
    • Elderly

  3. Puberty happens during the teenage years.

    Circle one:   True   False

  4. Nina's grandpa is 75 years old. Which change is he most likely to notice in his body?

    • His hair turning grey
    • His first teeth coming in
    • A sudden growth spurt

  5. Which of these is a common sign of puberty?

    • Losing baby teeth
    • Learning to walk
    • A growth spurt (growing taller quickly)

  6. In old age, cuts and bruises usually heal faster than they did when a person was young.

    Circle one:   True   False

  7. Mia is 13 years old and just grew 3 inches in one year. Which stage is she most likely in?

    • Elderly
    • Toddler
    • Teenager (puberty)

  8. Leo says: 'Once someone becomes an adult, their body never changes again.' What is wrong with Leo's idea?

    • Adults never change, Leo is right
    • Adults' bodies do change, like in old age
    • Only babies' bodies change
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Answer key

For grown-ups. Fold this page away before handing over the rest.

The stages of a human life W1-mt_OSfCeIeBak-s1

  1. Baby · Baby is the very first stage, before toddler and child.
  2. Teenager · The order is baby, toddler, child, teenager, adult, elderly, so teenager comes right after child.
  3. True · Puberty is the stage when a child's body changes into a teenager's body.
  4. His hair turning grey · In old age, hair often turns grey. First teeth and growth spurts happen much earlier in life.
  5. A growth spurt (growing taller quickly) · A fast growth spurt is one of the clearest signs that puberty has started. Losing baby teeth and learning to walk happen much earlier.
  6. False · Healing usually gets slower in old age, not faster, because the body does not repair itself as quickly.
  7. Teenager (puberty) · A fast growth spurt like this happens during puberty, which starts in the teenage years.
  8. Adults' bodies do change, like in old age · The body keeps changing after adulthood too. In old age, strength, hair, and healing all change.
Worksheet · LightMySky