The Speed of Sound — Questions and answers

Read the full story

What did Diya notice about how the thunder sounded on Eldoria?

Choices

  1. It was very quiet.
  2. It sounded almost instant. ✓
  3. It happened before the lightning.
  4. It was barely noticeable.

Answer: It sounded almost instant.

From page 2

How does Diya imagine sound traveling in hotter air?

Choices

  1. Like balloons floating high.
  2. Like tiny dominoes pushing each other faster. ✓
  3. Like water flowing slowly.
  4. Like birds flying in a circle.

Answer: Like tiny dominoes pushing each other faster.

From page 4

What happens to the sound of a fire truck's siren as it races by, according to the Doppler effect?

Choices

  1. It becomes completely silent.
  2. It seems to change pitch. ✓
  3. It glows brighter.
  4. It smells like smoke.

Answer: It seems to change pitch.

From page 6

What is created when a jet plane flies faster than the speed of sound?

Choices

  1. A quiet whisper.
  2. A sonic boom. ✓
  3. A fluffy cloud.
  4. A colorful rainbow.

Answer: A sonic boom.

From page 8

What does understanding the speed of sound help us do?

Choices

  1. Draw better pictures.
  2. Explore the world. ✓
  3. Learn how to fly.
  4. Bake delicious cookies.

Answer: Explore the world.

From page 10