How Fast Can Humans Run?

Which sentence from the section "Long-Distance Runners" gives one reason why people run fast?

• Scientists discovered that people run faster when they compete.

• Sports scientists also look at people who run for long distances.

• The fastest marathon runners are men between 25 and 29 years old.

• They can run up to 577 feet per minute.

Read the paragraph from the section "The Upper Limits.":

Humans are much slower than some animals. The fastest animal is the cheetah. It can run up to 70 mph. Usain Bolt cannot even run at half that speed. Some experts think the fastest a person can run might be 35–40 mph. No one is sure just yet, though.

Which information from this paragraph explains that humans are slow compared to some animals?

• The fastest animal is the cheetah.

• Some experts think the fastest a person can run might be 35-40 mph.

• Usain Bolt cannot even run at half the speed of a cheetah.

• No one is sure how fast humans could possibly run.

Read the heading "What Makes An Elite Runner?"

Which of the following is a synonym for the word Elite?

• Bad

• Perfect

• Fine

• Top

Read the sentence from "The Upper Limits.":

It can run up to 70 mph.

In this sentence, "mph" is most likely a measurement of:

• Speed

• Distance

• Time

• Height