Science Video: Matter Cycles

What characteristic of carbon makes it a fundamental building block for life and the subject of organic chemistry?

• Its ability to form only two types of compounds.

• Its rarity on Earth.

• Its unique ability to form a vast number of diverse compounds.

• Its inertness and lack of reactivity.

Which of the following is NOT mentioned as a major carbon reservoir?

• Oceans

• Rocks

• Living organisms

• The Earth's core

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What is the primary role of bacteria in the nitrogen cycle, as described in the video?

• To release nitrogen gas back into the atmosphere.

• To convert atmospheric nitrogen into usable forms like ammonia and ammonium.

• To consume fixed nitrogen from plants.

• To create fossil fuels from dead organisms.

What is a potential negative consequence of excessive nitrogen fertilizer draining into bodies of water?

• It causes a decrease in algae and water plant growth.

• It leads to an increase in dissolved oxygen, benefiting aquatic life.

• It can cause excessive growth of aquatic producers (algae blooms), which then deplete dissolved oxygen when they decompose.

• It has no significant impact on aquatic ecosystems.