Penny views a picture of a giant loop extending from the Sun. She labels this loop as a solar flare, but her lab partner disagrees. Which statement BEST illustrates why Penny labeled the picture incorrectly? Select one or more:

a.

It is a sunspot, erupting dark plasma out from the surface.

b.

It is a prominence, which are large loops of gas in the Sun’s atmosphere.

c.

It is a convection current, circulating heat from the core to the surface.

d.
It is a Coriolis current, a rotation of plasma at the surface.

Which process can increase the rate of greenhouse gas emissions into the atmosphere in response to a decrease in albedo

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Acommon kind of mechanical weathering is called