Echoes quiz for 3rd grade science with answers

📚 Quick Study Guide

• 🔊 An echo is a sound that is repeated because it bounces off a surface.
• ⛰️ Echoes are commonly heard in places like canyons, caves, and large rooms.
• 📏 The further you are from a surface, the longer it takes for the echo to return.
• ⏱️ To hear a distinct echo, you need to be at least about 17 meters (56 feet) away from the reflecting surface.
• 👂 Echoes happen because sound travels in waves, and these waves can bounce (reflect) off objects.

🧪 Practice Quiz

1. What is an echo?
   1. A silent space
   2. A repeated sound
   3. A bright light
   4. A type of bird
2. Where are echoes commonly heard?
   1. In outer space
   2. In quiet libraries
   3. In canyons and caves
   4. Under water
3. What causes an echo?
   1. Sound waves being absorbed
   2. Sound waves bouncing off a surface
   3. The absence of sound
   4. Wind blowing through trees
4. About how far away do you need to be from a surface to hear a distinct echo?
   1. 1 meter
   2. 17 meters
   3. 100 meters
   4. 0.5 meters
5. What travels in waves to create echoes?
   1. Light
   2. Water
   3. Sound
   4. Electricity
6. If you shout in a large empty room, what are you most likely to hear?
   1. Silence
   2. An echo
   3. A whisper
   4. A song
7. Why don't you usually hear echoes in a small, furnished room?
   1. Because the room is too small for sound to travel.
   2. Because furniture absorbs the sound.
   3. Because people are talking.
   4. Because the walls are too soft.