High School

**SHOWTIME QUESTIONS**
*(Answer while viewing the video)*

1. **What are organic molecules?**
a. Molecules that contain nitrogen
b. Molecules that contain oxygen
c. Molecules that contain carbon

2. **Which of the following is not true of carbon?**
a. It is found in everything on Earth
b. It has the ability to form many compounds
c. It is often known as the building block of life

3. **Where does carbon cycle?**
a. Between the atmosphere and space
b. Between carbon reservoirs
c. Between carbon pools

4. **How do plants typically obtain carbon?**
a. From the atmosphere
b. From the soil
c. From rainwater

5. **How do animals obtain carbon?**
a. Breathing it in from the atmosphere
b. Drinking it in from lakes and rivers
c. Eating plants or other animals

6. **What is created when dead organisms are stored in sediment over a very long period of time?**
a. Fossils
b. Fossil fuels
c. Mountains

7. **Carbon dioxide is a greenhouse gas. How do greenhouse gases impact the atmosphere?**
a. They trap heat in the atmosphere
b. They keep heat out of the atmosphere
c. They replace the oxygen in the atmosphere

8. **In which biomolecules is nitrogen found?**
a. Proteins and lipids
b. Nucleic acids and carbohydrates
c. Proteins and nucleic acids

9. **When nitrogen is converted into usable forms, it is...**
a. Broken
b. Fixed
c. Able to perform photosynthesis

10. **What do nitrogen-fixing bacteria in the soil convert nitrogen into?**
a. Ammonia and ammonium
b. Nitrite and nitrate
c. Nitrous oxide and nitrogen gas

11. **Which type of bacteria convert ammonia and ammonium into nitrates and nitrites?**
a. Nitrogen-fixing bacteria
b. Nitrifying bacteria
c. Denitrifying bacteria

12. **How do animals obtain nitrogen?**
a. Eating plants or other animals
b. Breathing it in from the atmosphere
c. Drinking it from nitrogen-rich water sources

13. **What type of organisms perform ammonification to return nitrogen from dead organisms to the soil?**
a. Consumers
b. Producers
c. Decomposers

14. **Which type of bacteria convert nitrates and nitrites into atmospheric nitrogen gas?**
a. Nitrogen-fixing bacteria
b. Nitrifying bacteria
c. Denitrifying bacteria

15. **What can lead to algal blooms that block light and deplete aquatic ecosystems of oxygen?**
a. Excessive fertilizer use
b. Burning of fossil fuels
c. Decomposition of terrestrial organisms

Answer :

Final answer:

This set of questions explores the concepts of organic molecules, the carbon cycle, and the role of nitrogen in ecosystems. Understanding the processes involving carbon and nitrogen is crucial for comprehending how life sustains itself. Additionally, it highlights the impact of human activity on these cycles, leading to issues like algal blooms.


Explanation:

Understanding Organic Molecules and Carbon Cycle

1. Organic molecules are defined as molecules that contain carbon. This is a fundamental principle in biology, as carbon is a key element in the structure of living organisms.

2. Among the options given, the statement that is not true of carbon is a. "It is found in everything on Earth." While it’s a prevalent element, it isn’t literally in everything.

3. The carbon cycle occurs between carbon reservoirs, which include the atmosphere, oceans, and living organisms.

4. Plants obtain carbon primarily from the atmosphere through a process called photosynthesis, where they absorb carbon dioxide.

5. Animals acquire carbon by eating plants or other animals, integrating carbon into their bodies through consumption.

6. When dead organisms are stored in sediment over a long period, they may eventually form fossil fuels.

7. Greenhouse gases like carbon dioxide trap heat in the atmosphere, leading to an increase in global temperatures.

8. Nitrogen is found in proteins and nucleic acids, critical for the structure and function of various biological molecules.

9. When nitrogen is converted into usable forms, it is said to be fixed.

10. Nitrogen-fixing bacteria convert nitrogen into ammonia and ammonium, which are usable by plants.

11. The bacteria responsible for converting ammonia and ammonium into nitrates and nitrites are called nitrifying bacteria.

12. Animals obtain nitrogen by eating plants or other animals, similar to their carbon intake.

13. Decomposers perform ammonification to return nitrogen from dead organisms to the soil, enhancing soil fertility.

14. The conversion of nitrates and nitrites back into atmospheric nitrogen gas is done by denitrifying bacteria.

15. Algal blooms, which can block light and deplete oxygen in aquatic ecosystems, are often triggered by excessive fertilizer use, which introduces too many nutrients into the water.


Learn more about Carbon and Nitrogen Cycle here:

https://brainly.com/question/37211642


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