Unit 4: Water use and the Environment

Learn about how craters are formed and about some of Canada's impact craters.

Learn how you can write and reveal secret messages in this hands-on chemistry activity.

Learn how to make a pH indicator and test water samples.

Aquaculture is seen as a sustainable way to produce fish. But are farmed salmon better than wild fish?

4 images of some fish such as koi that live in freshwater river and lake environments and in freshwater aquariums and garden ponds

14 images of some fish such as lion fish, grouper and sharks that live in saltwater environments like oceans, saltwater lakes and aquariums

Scientists can observe birds to get useful information about the health of, and changes in, an ecosystem.

When fertilizers from agriculture get into lakes and rivers, big problems can result for aquatic ecosystems, food chains & webs!

12 images of some birds such as seagulls, puffins, ducks and Canada Geese that live on or around freshwater or saltwater habitats