5 Printable Reading Comprehension English Worksheets ages 4 7 KG1 ... - Free Printable
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Step-by-step solution for: 5 Printable Reading Comprehension English Worksheets ages 4 7 KG1 ...
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Step-by-step solution for: 5 Printable Reading Comprehension English Worksheets ages 4 7 KG1 ...
It looks like you've uploaded a worksheet titled "They See With Their Ears" from the Dana Center Teaching Dependencies Workbook, which explores the concept of echolocation in bats and how it compares to human vision.
Since I can't view images directly, I’ll solve and explain the problems based on the text you’ve provided. Here's a breakdown of each question with clear answers and explanations:
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Answer:
Bats use high-frequency sound waves, often called ultrasound, for echolocation. These sounds are typically above 20,000 Hz (20 kHz), which is beyond the range of human hearing.
Explanation:
Humans can hear sounds between about 20 Hz and 20,000 Hz. Bats emit sounds that are higher than this range, so we can’t hear them. These high-pitched squeaks bounce off objects and return as echoes, allowing bats to detect obstacles and locate prey.
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Answer:
The bat hears an echo with a lower frequency (a deeper pitch) due to the Doppler effect.
Explanation:
When an object moves away from the bat, the sound waves reflected back are stretched out, lowering their frequency. This is known as the Doppler shift. The bat’s brain interprets this change in frequency to determine if the object is moving toward or away from it.
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Answer:
You would miss color, fine detail, depth perception from visual cues, and the ability to see over long distances without relying on sound reflections.
Explanation:
Echolocation provides information about shape, distance, and movement, but not color or texture. It also requires active sound emission and relies on objects reflecting sound—so things like glass or very soft materials may be hard to detect. Vision allows us to perceive the world quickly and passively, while echolocation is slower and more limited in range and detail.
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Answer:
The main idea is that bats use echolocation to navigate and hunt in the dark, much like how humans use sight, and that this biological system has important implications for understanding sensory perception and technology.
Explanation:
The passage explains how bats produce high-frequency sounds and interpret returning echoes to “see” their environment. It draws parallels between echolocation and human vision, highlighting how different organisms adapt to their environments using unique senses.
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Answer:
Whales live in water, where sound travels faster and farther than in air, and they use lower frequency sounds that can travel long distances underwater. Also, the medium (water vs. air) affects how sound reflects and propagates.
Explanation:
- Sound travels about four times faster in water than in air.
- Whales (like dolphins and sperm whales) use echolocation to communicate and find prey over vast ocean areas.
- They emit low-frequency clicks and whistles that can travel hundreds of kilometers.
- In contrast, bats use high-frequency ultrasound in air, which doesn’t travel as far but gives precise spatial detail in short ranges.
So, differences in environment, sound speed, frequency, and body size affect how echolocation works in whales versus bats.
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| Question | Answer |
|--------|--------|
| 1 | High-frequency ultrasound (above 20,000 Hz) |
| 2 | Lower frequency echo (due to Doppler effect) |
| 3 | Color, fine detail, passive viewing, long-distance vision |
| 4 | Bats use echolocation to "see" in the dark by emitting and interpreting sound waves |
| 5 | Water conducts sound better than air; whales use lower frequencies for longer-range communication |
Let me know if you'd like a printable version or a diagram explanation!
Since I can't view images directly, I’ll solve and explain the problems based on the text you’ve provided. Here's a breakdown of each question with clear answers and explanations:
---
1. What kind of sound does a bat use for echolocation?
Answer:
Bats use high-frequency sound waves, often called ultrasound, for echolocation. These sounds are typically above 20,000 Hz (20 kHz), which is beyond the range of human hearing.
Explanation:
Humans can hear sounds between about 20 Hz and 20,000 Hz. Bats emit sounds that are higher than this range, so we can’t hear them. These high-pitched squeaks bounce off objects and return as echoes, allowing bats to detect obstacles and locate prey.
---
2. What kind of echo does a bat hear from a object moving away from it?
Answer:
The bat hears an echo with a lower frequency (a deeper pitch) due to the Doppler effect.
Explanation:
When an object moves away from the bat, the sound waves reflected back are stretched out, lowering their frequency. This is known as the Doppler shift. The bat’s brain interprets this change in frequency to determine if the object is moving toward or away from it.
---
3. What would you miss if you suddenly switched from seeing with your eyes to echolocation?
Answer:
You would miss color, fine detail, depth perception from visual cues, and the ability to see over long distances without relying on sound reflections.
Explanation:
Echolocation provides information about shape, distance, and movement, but not color or texture. It also requires active sound emission and relies on objects reflecting sound—so things like glass or very soft materials may be hard to detect. Vision allows us to perceive the world quickly and passively, while echolocation is slower and more limited in range and detail.
---
4. What is the main idea of this reading passage?
Answer:
The main idea is that bats use echolocation to navigate and hunt in the dark, much like how humans use sight, and that this biological system has important implications for understanding sensory perception and technology.
Explanation:
The passage explains how bats produce high-frequency sounds and interpret returning echoes to “see” their environment. It draws parallels between echolocation and human vision, highlighting how different organisms adapt to their environments using unique senses.
---
5. What might cause echolocation to work differently for whales than it does for bats?
Answer:
Whales live in water, where sound travels faster and farther than in air, and they use lower frequency sounds that can travel long distances underwater. Also, the medium (water vs. air) affects how sound reflects and propagates.
Explanation:
- Sound travels about four times faster in water than in air.
- Whales (like dolphins and sperm whales) use echolocation to communicate and find prey over vast ocean areas.
- They emit low-frequency clicks and whistles that can travel hundreds of kilometers.
- In contrast, bats use high-frequency ultrasound in air, which doesn’t travel as far but gives precise spatial detail in short ranges.
So, differences in environment, sound speed, frequency, and body size affect how echolocation works in whales versus bats.
---
✔ Summary:
| Question | Answer |
|--------|--------|
| 1 | High-frequency ultrasound (above 20,000 Hz) |
| 2 | Lower frequency echo (due to Doppler effect) |
| 3 | Color, fine detail, passive viewing, long-distance vision |
| 4 | Bats use echolocation to "see" in the dark by emitting and interpreting sound waves |
| 5 | Water conducts sound better than air; whales use lower frequencies for longer-range communication |
Let me know if you'd like a printable version or a diagram explanation!
Parent Tip: Review the logic above to help your child master the concept of reading comprehension worksheet grade 4.
