Curriculum › Grade 3 › Science

When the Environment Changes

  • Grade 3
  • Science
  • 3-LS4-4
  • Life Science
  • Free lesson

Aligned to 3-LS4-4 — Next Generation Science Standards.

What this lesson teaches

When a habitat changes, some plants and animals struggle to live there. People can think of solutions to help living things when this happens.

Worked examples

Example 1

When a pond dries up, ducks lose their home, so a town might build a new pond to bring the animals back.

Example 2

When a forest is cut down, the animals that lived there must move, adapt to the new place, or die out.

Example 3

Not every change is bad for everyone. A fallen tree kills the plants it lands on but opens a sunny gap where new seedlings can grow.

Practice questions

  1. Name one change to a habitat, like less rain or a cut-down forest, and who it hurts.
  2. Think of one solution people could try to help the affected plants or animals.
  3. Decide if your solution is a good idea and explain one reason why.

Watch the lesson

Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.

▶ Watch this lesson

En español

Cuando el ambiente cambia

Cuando un hábitat cambia, algunas plantas y animales tienen dificultades para vivir ahí. Las personas pueden pensar en soluciones para ayudar a los seres vivos cuando esto pasa.

Ejemplo 1: Cuando un estanque se seca, los patos pierden su hogar, así que un pueblo podría construir un nuevo estanque para que los animales regresen.

Ejemplo 2: Cuando se tala un bosque, los animales que vivían ahí deben mudarse, adaptarse al nuevo lugar o desaparecer.

Ejemplo 3: No todo cambio es malo para todos. Un árbol caído mata las plantas donde cae pero abre un claro soleado donde pueden crecer nuevas plantitas.

More Life Science lessons

Adaptation and Survival3-LS4Traits From Parents3-LS3-1The Environment Shapes Traits3-LS3-2Clues From Fossils3-LS4-1Traits That Help You Survive3-LS4-2

Teach this lesson today

An AI tutor that guides with questions instead of just giving answers — all K–12 core subjects, every child in the family.

Start free — no card required