Scientific notation: write, convert and say how many times larger

Grade 8 Math Worksheet - Building Confidence

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Circle the best answer, or write your answer on the line.

  1. A city library has about 10^5 books. Ari's class shelf has about 10^2. How many times as many is the first, as a single power of 10?

  2. A lake holds about 10^9 liters of water. Esme's bathtub holds about 10^2 liters. How many times as many is the first, as a single power of 10?

  3. About 3,900,000 people live in Jun's state. What is that, rounded to one digit times a power of 10?

  4. Kira reads that the Moon is about 384,000 km from Earth. What is that, rounded to one digit times a power of 10?

  5. Luz reads that a blue whale weighs about 150,000 kg. What is that, rounded to one digit times a power of 10?

  6. Milo reads that about 7,800,000 people live in a big city. What is that, rounded to one digit times a power of 10?

  7. Noah reads that a big oak tree has about 260,000 leaves. What is that, rounded to one digit times a power of 10?

  8. Pia's town library has 18,600 books. What is that, rounded to one digit times a power of 10?

  9. In Ren's science notes, a human hair is about 0.00008 m wide. What is that as one digit times a power of 10?

  10. Tala reads that a pollen grain is about 0.000025 m across. What is that, rounded to one digit times a power of 10?

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Scientific notation: write, convert and say how many times larger

Answer Key - Grade 8 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

  1. A city library has about 10^5 books. Ari's class shelf has about 10^2. How many times as many is the first, as a single power of 10?

    10^3
  2. A lake holds about 10^9 liters of water. Esme's bathtub holds about 10^2 liters. How many times as many is the first, as a single power of 10?

    10^7
  3. About 3,900,000 people live in Jun's state. What is that, rounded to one digit times a power of 10?

    4 × 10^6
  4. Kira reads that the Moon is about 384,000 km from Earth. What is that, rounded to one digit times a power of 10?

    4 × 10^5
  5. Luz reads that a blue whale weighs about 150,000 kg. What is that, rounded to one digit times a power of 10?

    2 × 10^5
  6. Milo reads that about 7,800,000 people live in a big city. What is that, rounded to one digit times a power of 10?

    8 × 10^6
  7. Noah reads that a big oak tree has about 260,000 leaves. What is that, rounded to one digit times a power of 10?

    3 × 10^5
  8. Pia's town library has 18,600 books. What is that, rounded to one digit times a power of 10?

    2 × 10^4
  9. In Ren's science notes, a human hair is about 0.00008 m wide. What is that as one digit times a power of 10?

    8 × 10^-5
  10. Tala reads that a pollen grain is about 0.000025 m across. What is that, rounded to one digit times a power of 10?

    3 × 10^-5