The energy content of food is described in terms of calories because the energy in food ultimately becomes heat.
God bless!
Answer:
D) largest mass extinction event in Earth's history
Explanation:
The cambrian era started following the pre-cambrian extinction
speed = distance/ time
Sally's speed = 200m / 39 s = 5.13 ms^-1
I would think A - Volcanic eruptions can cause both global warming and global cooling.
