Focus On Life Science: California Grade 7

Chapter 8: The History of Life on Earth

Math Practice

1.
The Chicxulub impact basin, Yucatan Peninsula, Mexico is approximately 64.98 million years old. Write this number in standard notation.
A)6.498 x 10exp7
B)6,498,000 years
C)64.98 x 10exp7
D)64,980,000 years
2.
The Chicxulub impact basin, Yucatan Peninsula, Mexico is approximately 64.98 million years old. Write this number in scientific notation.
A)6.498 x 10exp7 years
B)64,980,000 years
C)6,498,000 years
D)64.98 x 10exp7
3.
The ring-like impact crater in Chad, Africa, is approximately 200 million years old. Write this number in standard notation.
A)200,000,000 years
B)2,000,000 years
C)20 x 10exp8 years
D)2.0 x 10exp8 years
4.
The ring-like impact crater in Chad, Africa, is approximately 200 million years old. Write this number in scientific notation.
A)20 x 10exp8 years
B)2.0 x 10exp8 years
C)200,000,000 years
D)2,000,000 years
5.
An impact crater in Wolfe Creek, Australia, is approximately 300,000 years old. Write this in scientific notation.
A)3 x 10exp6 years
B)30 x 10exp4 years
C)3 x 10exp5 years
D)3 x 10exp4 years
6.
" Deep Bay, Saskatchewan, Canada, is a crater that is approximately 150 million years old. Write this number in standard notation. "
A)15,000,000 years
B)150,000,000 years
C)15 x 10exp8 years
D)1.5 x 10exp8 years
7.
" Deep Bay, Saskatchewan, Canada, is a crater that is approximately 150 million years old. Write this number in scientific notation. "
A)1.5 x 10exp8 years
B)150,000,000 years
C)15,000,000 years
D)15 x 10exp8 years
8.
Lake Bosumtwi, Ghana, is an impact crater that is approximately 1.5 million years old. Write this number in standard notation.
A)1,500,000 years
B)150,000 years
C)15 x 10exp6 years
D)1.5 x 10exp6 years
9.
Lake Bosumtwi, Ghana, is an impact crater that is approximately 1.5 million years old. Write this number in scientific notation.
A)1,500,000 years
B)1.5 x 10exp6 years
C)150,000 years
D)15 x 10exp6 years
10.
The circular ring of hills that defines Gosses Bluff was made by the impact of an asteroid or comet approximately 142.5 million years ago. Write this number in scientific notation.
A)142,500,000 years
B)14.25 x 10exp8 years
C)1.425 x 10exp8 years
D)1,425,000 years
Grade 7
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