The Atmosphere: Oxygen and Carbon Dioxide

The video explains how oxygen and carbon dioxide are cycled between plants and animals. It highlights the role of plants, especially large ones like trees, in producing oxygen through photosynthesis. Additionally, it discusses the significant contribution of microscopic oceanic organisms to the global oxygen supply.

What do people and animals exhale as a byproduct of breathing?

• Oxygen

• Carbon Dioxide

• Hydrogen

• Nitrogen

Which process allows plants to supply oxygen to the Earth?

• Respiration

• Photosynthesis

• Transpiration

• Fermentation

What do large plants, such as trees, absorb from the atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Methane

Which organisms in the oceans are believed to contribute significantly to the global oxygen supply?

• Fish

• Microscopic plant-like organisms

• Coral reefs

• Sea turtles

What is continuously cycled between plants and animals?

• Water and sunlight

• Carbon Dioxide and Oxygen

• Nitrogen and Hydrogen

• Glucose and Starch