Imagine you do DNA fingerprinting in a forensics lab. You obtain nine
samples from a crime scene and use them to make the DNA fingerprints
shown below.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.