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4th Science
4th grade science review Ch.4-6
| Question | Answer |
|---|---|
| How much of the earth is covered by water | three-fourths |
| inventor of the phonograph | Thomas Edison |
| Why do birds migrate? | they cannot survive the winter in cold climates |
| used to locate icebergs and submarines | sonar |
| sound is produced when..... | an object vibrates |
| the two gases that make up water | hydrogen and oxygen |
| water in the gaseous state | water vapor |
| inventor of the telephone | Alexander Graham Bell |
| animal that hears the highest frequencies | bats |
| sound waves travel the fastest through which state of matter | solid |
| Does sound travel faster or slower than light? | slower |
| part of the ear that contains the hammer, anvil, and stirrup | middle ear |
| snail-shaped part of the ear that contains the organ of hearing | cochlea |
| reflected sound that is heard again | echo |
| What are clouds made of? | water and air |
| anything that takes up space and has weight | matter |
| process where water vapor turns back to a liquid | condensation |
| boiling point of water | 212 degrees F |
| three states of matter | solid, liquid, gas |
| air has weight so it exerts..... | pressure |
| freezing point of water | 32 degrees F |
| tiny particles that make up molecules | atoms |
| process where water turns from a liquid to a gas (water vapor) | evaporation |
| carries the message of sound to the brain | auditory nerve |
| the lowest frequency that a human can hear | 20 times per second |
| vibrations of the vocal cords produce.... | speech |
| Is sound a form of energy? | yes |
| Can sound waves travel through empty space? | no |
| when an object vibrates very rapidly the sounds produced have a .... | high pitch |
| Do bats see with their ears? | yes |
| bossy bird that plants oak trees | blue jay |
| singing bird that mimics | mockingbird |
| bird with an extra-long tongue to eat insects | woodpecker |
| chubby bird that nests in unusual places | wren |
| bird that walks headfirst down trees | nuthatch |
| tiny bird that can fly backward | hummingbird |
| bird that hangs upside down | chickadee |
| spangled bird found in every part of the U.S. and Canada | starling |
| Why does a low-frequency sound have a low pitch? | the object vibrates slowly |
| Why are feathers important for birds? | to keep warm; to fly |
Created by:
vwalker5
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