Which statements about fresh water and salt water are true? Check all that apply.

1. A pond is a source of salt water.

2. Fresh water is essential to all life on Earth.

3. Half of Earth's water is fresh water.

4. Most of Earth's water is stored in the oceans.

5. Oceans are the largest source of fresh water.

Statement 2 - 'Fresh water is essential to all life on Earth' and statement 4 - 'Most of Earth's water is stored in the oceans', are true.

Explanation:

Statement 1 - Ponds are generally classified as a source of fresh water. Statement 3 - Only 2.5% out of all the water present on Earth is fresh water. Statement 5 - Oceans indeed are the largest source of water, but unfortunately not freshwater. Ocean water cannot be used for most basic day-to-day operations.

The correct answers are:

2. Fresh water is essential to all life on earth.

and

4. Most of earth's water is stored in the oceans