Write a sentence that explains how  you might use a dichotomous key while birdwatching in the woods.​

Select all the true statements about the cosmic microwave background radiation

The energy required to vaporize a certain amount of a substance is greater than the amount of energy necessary to raise the temperature of the same amout of that substance by 1 degreee celcius

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs