Considering what you know about oxygen, carbon dioxide, photosynthesis and cellular respiration to explain what is happening with regard to these two gases in
the image?

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium

What are the student's observations and inferences before he starts his investigation?

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.