Natural Science · 4.º de Primaria · Ficha de repaso
Unit 4: We protect ecosystems
Aquatic and land ecosystems, biodiversity, what harms ecosystems and how we can look after them.
4.º de Primaria · Natural Science · Unit 4: We protect ecosystems · Ficha de repaso
Types of ecosystems
| Aquatic | Land |
|---|---|
| marine: seas and oceans | forest, jungle, grassland |
| freshwater: rivers, lakes, ponds, wetlands | desert, mountain, polar areas |
Ecosystem words
- habitat
- where a living thing lives
- biodiversity
- the variety of living things: rainforests have the most
- endangered
- at risk of disappearing, like the Iberian lynx
- extinct
- no longer exists
Threats to ecosystems
- pollution
- cutting down forests
- fires
- hunting
- invasive species
An invasive species comes from another place and harms the local living things, like the American crayfish in Spanish rivers.
We look after ecosystems
- National parks protect nature: Doñana, Picos de Europa.
- Plant trees, recycle, save water and pick up litter.
- Take your rubbish home: plastic can take hundreds of years to disappear.