In which of Earth's spheres does the stratosphere exist? A hydrosphere
B geosphere
C atmosphere
D biosphere

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

Angiosperms are the most successful terrestrial plants. which of the following features is unique to them and account for their success? a. fruits enclosing seeds b. wind pollination c. sperm cells without flagella d. embryos enclosed within seed coats e. dominant gametophytes

The amount of radioactive isotopes contributing heat to earth is greater now than it was when earth was newly formed. question 20 options: true false