Answer:
Electromagnetic waves can travel through a vacuum, that is an empty space, whereas mechanical waves cannot. They need a medium to travel such as water or air. Ripples in a pond are an example of mechanical waves whereas electromagnetic waves include light and radio signals, which can travel through the vacuum of space.
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Answer:
Genetics are important because it'll pass down to your kids - For example, if you have a disease, your child can possibly obtain the disease from you.
Answer:
(of a substance) become concentrated inside the bodies of living things.
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Answer:
long term heart promblems
long term lungs and liver
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