Suppose a future telescope is able to take a spectrum of a terrestrial planet around another star and reveals the presence of significant amounts of ozone. What would this mean, and why?
What will be an ideal response?
The presence of abundant ozone would probably be an indication of photosynthetic life because ozone is a form of oxygen, which is produced by life.
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A gas is placed in a container, which is immersed in an ice-water mixture as shown below
As the piston is slowly lowered, the temperature...
Which type of heating causes sunburn?
a. conduction c. radiation b. convection d. all of the above
Black holes suck up all matter in sight
Indicate whether the statement is true or false
Why is the absorption spectrum of atomic hydrogen different from that of helium?
A. There is usually more hydrogen than helium in stars. B. Hydrogen atoms have a lower mass, and are therefore faster. C. The energy differences between orbitals in hydrogen are different from those in helium. D. Helium has more neutrons than hydrogen.