Transcript 幻灯片 1

Life in the seas
karen
Revision
1. Where can you find coral?
Can be found in the water with a depth of less
than 60 meters.
2. What plants keep sea water clean?
Seaweeds. Because they produce various of
chemicals that keep the water clean.
3.Where is the longest coral bed in the world?
lies off the northeast coast of Australia.
4. Why don’t you find coral near the mouths of the
rivers?
Because near the mouths of the rivers the river
has too much soil or it is polluted.
5. Why is it difficult to swim in the Dead Sea?
Because the water of the Dead Sea is so salty
that the body floats on the surface.
6. Why is the Dead Sea called the Dead Sea?
Because very few things can live in so salty water.
baby sperm whale
grown-up sperm
whale
squid
Reading and questions.
1. Why can living things live in such cold oceans
around the Antarctica?
Because their blood contains a particular chemical.
2. Where does the squid live?
It lives in the dark at a great depth at the bottom.
3. What is the length of the sperm whale in general?
Over 18 meters
4. How much does a whale eat at a time?
May eat a ton of the small fish at a time.
5. Do all the whale feed on small fish?
No. A type of called the sperm whale feeds
on the squid.
6. How deep can a sperm whale dive?
It can dive to a depth of 1000 meters.
7. How does a sperm whale find food at the bottom
of the ocean where it is completely dark?
It uses sound waves to find food at the bottom
of the ocean where it is completely dark.
8. What body changes occur when the sperm
whale dives?
When it dives, its heart slows to half its
normal speed.
Sea star
jelly-fish
shrimp
lobster
seal
turtle
crab
Sea horse
Angel fish
Angel fish
How can we protect our sea?(one student,one sentence)
Thank you