Author Archive

Heather Johnson

4 videos

Learn about erosion and weathering in nature.
Erosion and Weathering (Subject: Science)
Learn about otters and their role as a keystone species.
Keystone Species (Subject: Science)
Learn about your water footprint and how much water we actually use.
Water Use (Subject: Science)
Learn about cohesion.
Cohesion (Subject: Science)