The correct answer is Metal.
Sound waves are vibrations which need medium to propagate. Higher the density of medium, the sound travels fastest. Sound travels fastest in solid than liquid and gas. Therefore, in this question sound will travel faster in metal because metal has higher density than air and water and it will not travel in vacuum as sound needs medium to travel.
Answer:
For early earth, it was filled with loads of oxygen and could kill humans if they breathed the oxygen that was in the air about 100 million years ago. This massive amount of oxygen cause massive creatures like the dinosaurs to exist. Current earth has an atmosphere with not too much oxygen.
Explanation:
brainliest
Answer:
You must understand that your body belongs to you. Most of the stuff you see on adverts are all fake. (It's mostly photoshop) Your beautiful no matter what you look like!
Explanation:
Hope this helps!
Explanation:
combustion happens when we dig up fossil fuel and burn it, so when we do that whatever is left goes into the air starting the carbon cycle again
Homeostasis, aka your body maintaining life and the right amounts of stuff.
