The carbon cycle across rock, ocean, air and life

Grade 9 Science Worksheet - Building Confidence

Circle the best answer.

1. 1.

   Where is most of Earth's carbon stored, by Ari's reading (NASA)?

   • In rocks
   • In the ocean's surface water
   • In plants and animals
   • In the air

2. Read this first

   Where carbon is and how fast it moves (NASA)

   Part of the cycle	NASA figure
   Carbon stored in rocks	about 65,500 billion metric tons
   Carbon through the slow cycle each year	10 to 100 million metric tons
   Carbon through the fast cycle each year	1,000 to 100,000 million metric tons
   Volcano CO₂ each year	130 to 380 million metric tons
   Human CO₂ each year	about 30 billion tons

3. 2.

   About how much carbon is stored in rocks, by Bo's reading (NASA)?

   • About 65,500 billion metric tons
   • About 130 to 380 million metric tons
   • About 30 billion tons
   • About 65 metric tons
4. 3.

   Besides rocks, which list names places carbon is stored, by Kira's reading (NASA)?

   • Living things, and nowhere else on Earth
   • The Sun, the Moon and outer space
   • Ocean, air, plants, soil and fossil fuels
   • Glacier ice, and nowhere else on Earth
5. 4.

   Rain, rock, river, sea floor, limestone, volcano. How long does carbon take to move through the slow carbon cycle, by Jun's reading (NASA)?

   • About one plant's or animal's lifespan
   • 1 to 2 days
   • 100 to 200 years
   • 100 to 200 million years

6. A yearly CO₂ wiggle

   Up in northern winter, down in spring and summer.

7. 5.

   How long does carbon take to move through the fast carbon cycle, by Noah's reading (NASA)?

   • About a lifespan
   • About the age of Earth
   • 100 to 200 million years
   • About a billion years
8. 6.

   In photosynthesis, what do plants take in to make sugars, by Pia's reading (NASA)?

   • Methane and soil heat
   • Limestone and rainwater
   • Oxygen and moonlight
   • Carbon dioxide and sunlight
9. 7.

   When does CO₂ in the air climb during the yearly wiggle, by Ren's reading (NASA)?

   • Spring, when new leaves come out on trees
   • Northern summer, when the most plants are growing fastest
   • Northern winter, when few plants grow and many decay
   • Midday, when the Sun is highest

10. Where carbon is and how fast it moves (NASA)

    Part of the cycle	NASA figure
    Carbon stored in rocks	about 65,500 billion metric tons
    Carbon through the slow cycle each year	10 to 100 million metric tons
    Carbon through the fast cycle each year	1,000 to 100,000 million metric tons
    Volcano CO₂ each year	130 to 380 million metric tons
    Human CO₂ each year	about 30 billion tons

11. 8.

    Using the table, how much carbon moves through the fast cycle each year, by Tala's reading (NASA)?

    • About 65,500 billion metric tons
    • 10 to 100 million metric tons
    • 130 to 380 million metric tons
    • 1,000 to 100,000 million metric tons
12. 9.

    Using the table, how much CO₂ do volcanoes emit each year, by Zee's reading (NASA)?

    • 1,000 to 100,000 million metric tons
    • 10 to 100 million metric tons
    • About 30 billion tons
    • 130 to 380 million metric tons
13. 10.

    Using the table, about how much CO₂ do humans emit each year, by Esme's reading (NASA)?

    • About 65,500 billion metric tons
    • About 30 million tons
    • 130 to 380 million metric tons
    • About 30 billion tons