<span>Haha... I guess it depends on how well you cook. If you're a terrible cook and your food catches fire, thats chemical change. Because the compounds in whatever food you're cooking becomes oxidized by O2, meaning it changes to a new compound.
If you're a decent cook and nothing catches fire, then it is only physical change, there are no reactions, just change of state.</span>
Two trophic levels
Typically there are three or four trophic levels in a community because after this point, it becomes very hard to sustain organisms. The amount of energy lost at each trophic level makes it harder and harder to sustain life.
Answer:
IndicatorLow pH colorHigh pH colorBromocresol greenyellowblueMethyl redredyellowMethyl purplepurplegreenAzolitmin (litmus)redblue
The troposphere is hotter near the Earth's surface because heat from the Earth warms this air. As the altitude increases the number of air molecules decreases, the average of their kinetic energy decreases.
Does this help?
if it does please mark me brainliest! thanks:)
