Many scientists believe that the current period of global warming is related to increased levels of
a. hydrogen in the outermost layer of the earth's atmosphere.
b. carbon dioxide in the earth's atmosphere.
c. radon being released from the earth's soil.
d. nitrogen in the earth's atmosphere.

Numbers with a end value of 4 or lower are rounded up, while with an end value of 5 or higher are rounded down. true or false?

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.

The point along a planet's orbit where it is closest to the sun is called the