Font size
WorksheetsYP3 3A Deep Blue Sea
Total questions: 8
Worksheet time: 4mins
The oceans cover just __________ of the planet. They the Earth's largest life-support system.
30%
70%
About_______of the oxygen we breathe is produced by the oceans.
50%
70%
80%
An estimated_______________ of all life on Earth is found in the oceans.
30%-50%
50%-80%
40%-70%
The world's fisheries employ about ___________people and feed billions.
180 million
81million
18 million
Sea levels have risen ____________over the past 100 years.
10-25 cm
25-50 cm
15-30 cm
The largest living structure in the world is the Great Barrier Reef. It measures around _____________in length.
500 kilometers
1000 kilometers
2600 kilometers
There are many endangered species, including whales, dolphins, sharks, and turtles. As many as _________are killed each year for their meat.
1 million
10 million
100 million
Just over_________of the ocean is protected by marine reserves and no-fishing zones.
2%
5%
10%
