Sunspots are cooler than the surrounding gas in the photosphere because
A) they are regions where convection carries cooler material downward.
B) there is less fusion occurring there.
C) magnetic fields trap ionized gases that absorb light.
D) strong magnetic fields slow convection and prevent hot plasma from entering the region.
E) magnetic fields lift material from the sunspot and quickly cool the material.
Question 2
Why does increasing the amount a greenhouse gas increase the temperature of a planet?
A) Greenhouse gases absorb visible light. B) Greenhouse gases emit visible light.
C) Greenhouse gases absorb infrared light. D) Greenhouse gases emit infrared light.
Exploring the functional activity of brain regions by using fMRI scans.
Brain Interpretation and Regions
Cranial nerves and their target regions. (Sensory nerves are shown in blue; motor nerves, in red.)
Human Geography: Places and Regions in Global Context
Regions Where Hurricanes Form
Regions involved in the control of genetic expression of the lac operon