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Carbon Dioxide and Carbon Cycle MCQ (Multiple Choice Questions) PDF Download

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The MCQ: What are two main processes which occur in natural carbon cycle "Carbon Dioxide and Carbon Cycle" App Download [Free] with answers: photosynthesis and decomposition, photosynthesis and respiration, photosynthesis and combustion, and photosynthesis and metabolism to learn online classes courses. Practice Carbon Dioxide and Carbon Cycle Quiz Questions, download Apple eBook (Free Sample) for online certificate courses.

SAT Test for SAT Prep

Carbon Dioxide and Carbon Cycle Questions and Answers PDF Download

MCQ: 1

What are two main processes which occur in natural carbon cycle?

  1. Photosynthesis and decomposition
  2. Photosynthesis and respiration
  3. Photosynthesis and combustion
  4. Photosynthesis and metabolism
MCQ: 2

The concentration of Carbon dioxide has increased; from

  1. 300 ppm to 370 ppm
  2. 280 ppm to 370 ppm
  3. 200 ppm to 370 ppm
  4. 380 ppm to 370 ppm
MCQ: 3

Which isotope of carbon is very rare and radioactive?

  1. Carbon-12
  2. Carbon-13
  3. Carbon-14
  4. Carbon-11
MCQ: 4

Planktons live on the surface of:

  1. Pond
  2. River
  3. Ocean
  4. Lake
MCQ: 5

The size of 'plankton' is:

  1. four-thousandth of a millimetre
  2. three-thousandth of a millimetre
  3. one-thousandth of a millimetre
  4. Two-thousandth of a millimetre

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