Earth's oceans Blank______.Multiple select question.have a short water residence timecontain about 90 percent of its biomasscontain about 97 percent of all liquid watercover nearly half of the planet's surfaceNeed help? Review these concept resources.

The correct answers are:

• contain about 97 percent of all liquid water
• cover nearly half of the planet's surface

Explanation:

• Earth's oceans do contain about 97 percent of all liquid water. This is a well-known fact and is often taught in geography and environmental science classes.
• Earth's oceans cover about 71 percent of the planet's surface, which is more than half. Therefore, the statement that they cover nearly half of the planet's surface is also correct.
• The statement that Earth's oceans have a short water residence time is incorrect. The residence time of water in the oceans is actually quite long, estimated to be about 3,000 years.
• The statement that Earth's oceans contain about 90 percent of its biomass is also incorrect. While the oceans do contain a large amount of biomass, it is not as high as 90 percent. The exact percentage can vary depending on the source, but it is generally agreed to be less than 90 percent.