Scientific notation: write, convert and say how many times larger
Grade 8 Math Worksheet
Circle the best answer, or write your answer on the line.
Ari reads that a heart beats about 2,800,000,000 times in a long life. What is that, rounded to one digit times a power of 10?
Bo reads that our galaxy has about 210,000,000,000 stars. What is that, rounded to one digit times a power of 10?
In Jun's science notes, a red cell in the body is about 0.0000075 m across. What is that, rounded to one digit times a power of 10?
In Kira's science notes, one kind of bacterium is about 0.0000021 m long. What is that, rounded to one digit times a power of 10?
In Luz's science notes, a grain of fine flour is about 0.000048 m across. What is that, rounded to one digit times a power of 10?
The Moon is about 4 × 10^8 m away. Milo's walk to the park is about 2 × 10^3 m. How many times as far is the Moon?
About 8 × 10^9 people live on Earth, and about 2 × 10^4 in Noah's town. How many times as many people live on Earth?
In Pia's notes, a hair is 8 × 10^-5 m wide and a bacterium is 2 × 10^-6 m long. How many times as long is the hair's width?
A fin whale weighs about 6 × 10^4 kg, and Ren's big dog about 3 × 10^1 kg. How many times as heavy is the whale?
Zee reads that the tallest mountain on Earth is about 8,849 m high. What is that, rounded to one digit times a power of 10?