Which layer of the sun's atmosphere are you looking at when you look at an image of a sun?
a) photosphere
b) chromosphere
c) corona
d) prominence

The graph shows the solubility of several different salts in water, across a range of temperatures. according to the graph, which salt can dissolve at a concentration of about 60 g/100 cm3 of water at 40 degrees celsius?

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Do you think the gene eef1 alpha1 supports cell theory? explain your response.