Iam a substance called carbon dioxide.
you breathe me out! my chemical formula is co2 - what am i?
a. an element
b. a compound
c. a mixture

How is the motion of the particles of water at 80 ⁰c different from the motion of the particles of water when it is 30 ⁰c?

Look at the photo of the leaf. which term best describes this leaf?

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor