Answer:
78 percent
Explanation:
The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.
Answer:
D. Chemical - mechanical - thermal
Explanation:
D because the food is chemical and the mechanical is the human excersice, and it results in thermal
I say false cause a hypothesis is a guess and not all the time it's dealing an experiment. If It is dealing with an experiment then true
Our sun<span> is the only </span>source of energy<span> that does propels of the </span>water cycle<span>. It's heat, or hot substance causes the surface evaporation that begins cycles.</span><span> The </span>water cycle<span> begins with the </span>sun, <span> and wind causing </span>water<span> to evaporate. The </span>water<span> is only carried high, not low above the earth's surface on rising currents of air.
Hope that this helps you! =)</span>
