Educational worksheet on bat echolocation with reading passage and comprehension questions.

Let’s go through each question one by one, using the passage to find the answers.

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Question 1: What kind of sound does a bat use for echolocation?

Look at the second paragraph. It says:
> “These sounds are ultrasonic, which is a special noise... These calls are known as echolocation.”

So, bats use ultrasonic sounds — that means sounds too high-pitched for humans to hear.

✔ Answer: Ultrasonic sounds (or ultrasound).

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Question 2: What kind of echo does a bat hear from an object moving away from it?

Check the third paragraph:
> “Depending on where the sound hits in the sides of its head, the bat can tell exactly where the object is. The bat also knows if the object is moving toward or away from it based on how fast the echo returns. If the object is moving away, the echo will be lower pitched and take longer to return.”

So, when something moves away, the echo is lower pitched and takes longer to come back.

✔ Answer: A lower-pitched echo that takes longer to return.

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Question 3: What would you miss if you suddenly switched from seeing with your eyes to echolocation? Why?

This one asks you to think about what vision gives us that echolocation doesn’t.

The first paragraph says:
> “Bats are among a very select group of animals... They don’t use their eyes to find their way around in the dark. These creatures use their ears to do this instead!”

And later:
> “It’s important because it helps the bat find food and avoid obstacles.”

But vision lets us see colors, shapes, faces, distant objects clearly, read words, etc. Echolocation tells you location and movement, but not color or fine detail.

Also, the passage says:
> “You may have noticed that some people get lost easily in large empty rooms or at the edge of a canyon. Bats make sure this never happens to them.”

That implies echolocation works best for detecting objects nearby and avoiding collisions — not for seeing beauty, reading signs, or recognizing friends’ faces.

✔ Answer: You’d miss seeing colors, detailed shapes, faraway things, and things like faces or written words — because echolocation only tells you where things are and if they’re moving, not what they look like.

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Question 4: What is the main idea of this reading passage?

Main idea = the big point the author wants you to understand.

The title is “They See With Their Ears” — so it’s about how bats use hearing instead of sight.

The whole passage explains:
- Bats use echolocation (sound) to navigate and hunt.
- How echolocation works (send out sound → listen for echo).
- Why it’s useful (find food, avoid obstacles, even in total darkness).
- How it compares to human vision.

✔ Answer: The main idea is that bats use echolocation — sending out sounds and listening for echoes — to “see” their surroundings instead of using their eyes.

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Question 5: What might cause echolocation to work differently for whales than it does for bats?

Think about where bats and whales live.

Bats fly in air. Whales swim in water.

Sound travels differently in air vs. water. In water, sound travels faster and farther. Also, whales are much bigger, and their environment (ocean) has different obstacles and prey.

The passage doesn’t talk about whales directly — but we can guess based on science常识 (common knowledge):

✔ Answer: Echolocation might work differently because whales live in water, where sound travels faster and farther than in air. Also, whales are bigger and hunt different kinds of prey, so their echolocation signals might be louder or lower in pitch.

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Final Answer:

1. Bats use ultrasonic sounds for echolocation.
2. When an object moves away, the bat hears a lower-pitched echo that takes longer to return.
3. You’d miss seeing colors, details, and distant objects because echolocation only tells you location and motion, not appearance.
4. The main idea is that bats use echolocation (sound echoes) to navigate and hunt instead of using their eyes.
5. Echolocation might work differently for whales because they live in water, where sound behaves differently than in air, and they have different sizes and hunting needs.