8.EE.3 & 8.EE4 Check

How many times larger is 3 x 10⁶ than 3 x 10¹?

• 243

• 729

• 100,000

• 300,000

Tags

CCSS.5.NBT.A.2

The number googol is the digit 1 followed by 100 zeros. If a particular quantity is equal to approximately googol, which of these is an appropriate estimate of the quantity?

• 1 x 10¹⁰

• 1 x 10¹⁰⁰

• 1 x 100¹⁰

• 1 x 100¹⁰⁰

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CCSS.8.EE.A.3

There are about 3 x 10²⁰ gallons of salt water on Earth, while there are about 6 x 10¹⁸ gallons of fresh water. About how many times the amount of fresh water is the amount of salt water?

• 2 times the amount

• 50 times the amount

• 200 times the amount

• 500 times the amount

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CCSS.8.EE.A.4

The diameter of a speck of dust is about 0.00002 inches. Which of these is an appropriate estimate for the diameter of the speck of dust?

• 2 x 10^-5 in.

• 2 x 10^-4 in.

• 2 x 10⁴ in.

• 2 x 10⁵ in.

Tags

CCSS.8.EE.A.3

The estimated mass of Earth is 5.97 × 10^24 kilograms. The sun’s mass is about 333,000 times greater than Earth’s mass. What is the approximate mass of the sun?

• 1.79 × 10^19 kilograms

• 1.79 × 10^24 kilograms

• 1.99 × 10^24 kilograms

• 1.99 × 10^30 kilograms

Tags

CCSS.8.EE.A.4

A research company estimates there are 1.5 × 10^9 automobiles in the world. The world population is approximately 8 × 10^9 people. About how many automobiles are there per person in the world?

• 0.19

• 0.65

• 1.20

• 5.33

Tags

CCSS.8.EE.A.4

One atomic mass unit is equal to about 1.67 × 10^-27 kilograms. The mass of an electron is about 5.45 × 10^-4 atomic mass unit. What is the approximate mass of an electron in kilograms?

• 3.3 × 10^-23 kilograms

• 3.3 × 10^-31 kilograms

• 9.1 × 10^-23 kilograms

• 9.1 × 10^-31 kilograms

Tags

CCSS.8.EE.A.4

A recent estimate of the world’s population is 8.04 × 10^9 people, which is about 24 times the population of the United States. What is the approximate population of the United States?

• 1.9 × 10^8 people

• 3.4 × 10^8 people

• 1.9 × 10^11 people

• 3.4 × 10^11 people

Tags

CCSS.8.EE.A.4