How Sonar Found Enemy Submarines — Questions and answers
Read the full story
What happened when Tao opened the Invention Encyclopedia?
Choices
- A) He found his favorite storybook.
- B) A swirl of light filled the room and everything dissolved. ✓
- C) His mom called him for dessert.
- D) He heard a loud noise from outside.
Answer: B) A swirl of light filled the room and everything dissolved.
From page 2
Where did Tao and Jia find themselves after using the encyclopedia?
Choices
- A) In a sunny park.
- B) On a windswept ship deck in 1917. ✓
- C) In a quiet library.
- D) At a bustling market.
Answer: B) On a windswept ship deck in 1917.
From page 3
Who was Jia working with in the laboratory to find submarines?
Choices
- A) Winston Churchill.
- B) A man in a naval uniform.
- C) Paul Langevin. ✓
- D) Tao's mom.
Answer: C) Paul Langevin.
From page 5
What animal did Jia say their method of finding submarines was like?
Choices
- A) Dolphins.
- B) Whales.
- C) Bats. ✓
- D) Birds.
Answer: C) Bats.
From page 6
How did Jia and Paul deal with the problem of noisy water?
Choices
- A) They waited for the water to be quiet.
- B) They used a specific sound frequency and focused it into a beam. ✓
- C) They used very bright lights.
- D) They asked the submarines to be quieter.
Answer: B) They used a specific sound frequency and focused it into a beam.
From page 7
What urgent event happened that made Jia tell Tao to remember how to focus the sound?
Choices
- A) They ran out of food.
- B) The ship was hit by a submarine attack. ✓
- C) It started to rain heavily.
- D) A new ship arrived.
Answer: B) The ship was hit by a submarine attack.
From page 8
What did Tao tell his mom he learned about finding submarines?
Choices
- A) They used special flashlights.
- B) They used binoculars from the ship.
- C) They used sonar to "see" underwater with sound. ✓
- D) They just waited until the submarines came to the surface.
Answer: C) They used sonar to "see" underwater with sound.
From page 10