Question

1. A water sample from a lake, ocean, rain or pond must have _____ proportions of hydrogen to oxygen. a)identical b)different c)similar d)reciprocal

Answer 1

Answer:

c) similar

.

.

.

.

.

.

.

......

.

Answer 2

Answer:

Oxygen dissolves into water from two sources: the atmosphere and from plants in the water. The primary source of oxygen for a pond is from microscopic algae (phytoplankton) or submerged plants. In the presence of sunlight, these produce oxygen through photosynthesis and release this oxygen into the pond water.