Exploring Powers of 10 in Grade 8 Mathematics

Why are powers of 10 useful for expressing very large or very small quantities?

• They make calculations more difficult.

• They make the numbers look more complex.

• They help in understanding the magnitude of the number quickly.

• They are easier to write in words.

How can 500 billion be expressed using powers of 10?

• 5 times 10 to the 10th power

• 5 times 10 to the 11th power

• 50 times 10 to the 10th power

• 50 times 10 to the 11th power

What is the advantage of using powers of 10 to write large numbers?

• It makes the number smaller.

• It helps in quickly understanding the size of the number.

• It makes the number more accurate.

• It makes the number more complex.

How can the world population of 7.4 billion be written using powers of 10?

• 7.4 times 10 to the 10th power

• 7.4 times 10 to the 9th power

• 7.4 times 10 to the 11th power

• 7.4 times 10 to the 8th power

What is the purpose of plotting numbers on a number line when comparing large quantities?

• To make the numbers look smaller.

• To visually compare the magnitudes of the numbers.

• To make the numbers more complex.

• To avoid using powers of 10.

What is the width of a bacterium cell in meters using powers of 10?

• 2 times 10 to the negative 8th power

• 2 times 10 to the negative 5th power

• 2 times 10 to the negative 6th power

• 2 times 10 to the negative 7th power

How can we label a number line to plot the width of a bacterium cell?

• With multiples of 10 to the negative 7th power

• With multiples of 10 to the negative 8th power

• With multiples of 10 to the negative 6th power

• With multiples of 10 to the negative 5th power

How much energy per person was used in the U.S. in 2014, using powers of 10?

• 2 times 10 to the 5th power kilograms of oil

• 2 times 10 to the 6th power kilograms of oil

• 2 times 10 to the 3rd power kilograms of oil

• 2 times 10 to the 4th power kilograms of oil

What is the benefit of using powers of 10 for calculations with very large or very small numbers?

• It makes the numbers smaller.

• It makes the numbers larger.

• It simplifies the calculations.

• It makes the calculations more complex.

What is the estimated total energy used in the U.S. in 2014 using powers of 10?

• 2 times 10 to the 14th power

• 2 times 10 to the 11th power

• 2 times 10 to the 12th power

• 2 times 10 to the 13th power