4. a) Tell the class three things you have learned about the world's oceans. b) THINK! Why are oceans important? In three minutes write a few sentences.

a) Three things I have learned about the world's oceans: - Oceans cover 71% of the Earth's surface. - Oceans make up 97% of its water supply. - Pollution from factories is poisoning fish in our oceans. b) Oceans are important because: - They provide a significant part of the Earth's water supply. - They are essential for our survival. - They are home to a variety of living creatures.