Answer:
Energy level
Explanation:
Periods in the periodic table are arranged in rows. Each row indicates a new period. For example, period 1 starts at the top and consist of only two elements, Hydrogen (H) and Helium (He).
The periods indicate the highest energy level of the elements that fall in the same row. So as the period increases, the energy level increases.
Answer
true
Explanation:
twins have the same genetic material
Answer:
C. How much greenhouse gas does your fuel produce compared with current fuel sources?
Explanation:
Answer A asks whether vehicles need to be changed to use the fuel.
Answer B asks whether the vehicles will get better mileage.
Answer C asks whether emissions will be better or worse than current emissions.
Answer D asks whether it will be more expensive than current fuel.
Hope this helps!
Answer:
Layer A is the crust and Layer B is the mantle.