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From Baby to Elderly: How Your Body Changes

Science · The Human Body · ages 9-11

Name ______________________ Date ____________

What is a growth spurt?
- Losing your baby teeth
- Growing taller quickly
- Learning to walk
Which life stage comes right after 'toddler'?
- Child
- Baby
- Elderly
True or false: hormones are chemical messengers that help trigger puberty.
Circle one: True False
Which of these is a body shape change during puberty?
- Shoulders or hips getting wider
- Losing your first tooth
- Learning to crawl
Put these stages in the correct order: child, adult, baby.
- Child, baby, adult
- Adult, child, baby
- Baby, child, adult
Glands release hormones. What do hormones do?
- Digest food in the stomach
- Carry messages that tell the body to start changing
- Pump blood through the heart
Which list correctly orders six life stages from birth to old age?
- Baby, toddler, child, adolescent, adult, elderly
- Baby, child, toddler, adult, adolescent, elderly
- Toddler, baby, child, adult, adolescent, elderly
Mia is 10 and hasn't started puberty yet, but her friend Tom already has. What best explains this?
- Mia is unhealthy
- Tom is older than Mia
- Hormones switch on puberty at a different age for each person

Answer key

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

Growing taller quickly · A growth spurt is a fast burst of height growth, common during puberty.
Child · The order is baby, toddler, child, adolescent, adult, elderly.
True · Glands release hormones, which travel in the blood and signal the body to start changing.
Shoulders or hips getting wider · Puberty widens shoulders or hips as the body moves toward its adult shape.
Baby, child, adult · Baby comes first, then child, then adult, later in the sequence of life stages.
Carry messages that tell the body to start changing · Hormones are chemical messengers, they travel in the blood and signal changes like puberty.
Baby, toddler, child, adolescent, adult, elderly · "Baby, toddler, child, adolescent, adult, elderly" keeps every stage in its correct place, from baby through elderly.
Hormones switch on puberty at a different age for each person · Puberty timing varies naturally from person to person, it isn't a sign anything is wrong.