Carbon Cycle and Law of Conservation of Energy and Mass

In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.

• burning . . . photosynthesis

• fixation . . . decomposition

• decomposition . . . photosynthesis

• respiration . . . decomposition

• respiration . . . photosynthesis

What is the name of the carbon reservoir represented by the rabbit in the diagram?

• producers

• consumers

• decomposers

• detritus

Where is Carbon found in ecosystems? Choose the best answer.

• in all living things

• in the soil

• in rocks and dirt

• in the biosphere

If the plant population decreased, the amount of carbon dioxide in the atmosphere would _________.

• Stay the same

• Increase

• Decrease

How do animals obtain carbon to be used in cellular processes?

• By breathing CO2

• By Photosynthesis

• By eating plants or other animals

• By carbon fixation

What are the two main reservoirs for carbon dioxide?

• Ocean, fossil fuels

• Ocean, atmosphere

• Atmosphere, fossil fuels

• Calcium Carbonate, ocean

Carbon exists in many forms on Earth. The diagram shows part of the carbon cycle. What is happening in Step 1?

• Animals are releasing energy into the environment and storing

  carbon.

• Animals are decomposing and releasing carbon into the soil.

• Animals are converting carbon dioxide from the atmosphere to

  oxygen.

• Animals are breaking down organic molecules and releasing

  carbon dioxide into the atmosphere through cellular respiration

What are the characteristics of an open system?

• Allow exchange of energy and matter with surroundings

• Traps energy and matter within itself

• Does not interact with the surroundings

• Only allows exchange of energy with surroundings

Combustion is another word for __________.

• Transportation
• Respiration
• Fossil Fuels
• Burning

How does carbon get into the soil?

• when a human dies
• When a plant dies
• when an animal dies
• all of the above