---
title: "Growing Up & Puberty"
description: "Describe the stages of human development from birth to old age: baby, toddler, child, adolescent (puberty), young adult, middle-aged adult, elderly — understanding the physical changes that happen at "
canonical: https://lightmysky.com/learn/science/growing-up-and-puberty-mt_pu2mmK27UA
source: https://lightmysky.com/learn/science/growing-up-and-puberty-mt_pu2mmK27UA.md
retrieved: 2026-10-19
---

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# Growing Up & Puberty

Describe the stages of human development from birth to old age: baby, toddler, child, adolescent (puberty), young adult, middle-aged adult, elderly — understanding the physical changes that happen at each stage, especially during puberty

Subject: Science · Area: The Human Body · Ages 9 to 11
Page: https://lightmysky.com/learn/science/growing-up-and-puberty-mt_pu2mmK27UA

## Ready when they can

- Name and order at least six life stages from birth to old age
- Describe key physical changes during puberty (growth spurts, body shape changes, development of adult features)
- Explain that puberty is triggered by hormones — chemical messengers released by glands

## Lesson: From Baby to Elderly: How Your Body Changes

Your body keeps changing your whole life. It moves through six main stages: baby, toddler, child, adolescent, adult, and elderly. Right now you're moving from child toward adolescent, the stage where puberty happens.

*(drawing: Six life stages, in order. The teen years are when puberty happens, changing a child's body into an adult's.)*

Puberty changes your body from a child's shape into an adult's shape. You may notice a growth spurt, growing taller faster than before. Shoulders or hips widen, and adult features like body hair start to appear.

**Tip.** These changes aren't random. Glands in your body release hormones, chemical messengers that travel in your blood and tell your body when to start changing. Hormones switch on at a different age for everyone, and that's normal.

**Recap.** You grow through six life stages, from baby to elderly. Puberty is when hormones from your glands trigger the growth spurts and body changes that turn a child into an adult.

## Practice

8 questions on this page, each with its working shown.

## Needs first

- [Basic Body Needs](https://lightmysky.com/learn/science/basic-body-needs-mt_cxJRc15osy)
- [Human Life Stages](https://lightmysky.com/learn/science/human-life-stages-mt_OSfCeIeBak)
- [Balanced Diet & Food Groups](https://lightmysky.com/learn/science/balanced-diet-and-food-groups-mt_QhLAeAlHI0)

## Opens up

- [How the Body Stays in Balance](https://lightmysky.com/learn/science/how-the-body-stays-in-balance-mt_J40cOn7VWn)