In what three physical states can matter exist?
A. solid, liquid, and gas
B. solid, vapor, and gas
C. light, liquid, and level
D. solid, liquid, and dark
Answer: A
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For each of the following unbalanced equations, which is depicted: oxidation or reduction? a) Cr ? Cr3+ b) Sn ? Sn(OH)42-
A) a) oxidation; b) reduction B) a) reduction; b) oxidation C) a) reduction; b) reduction D) a) oxidation; b) oxidation
What is the evidence that the Sun is a relatively new star in the universe?
What will be an ideal response?
Marine communities evolve more rapidly than terrestrial communities
Indicate whether the statement is true or false
The levels of mercury are low in the fish eaten almost daily by people living near an ocean. For these people, bioaccumulation means that
A) people eliminate most of the mercury they consume after a single day. B) mercury builds up in the fish and not the people. C) mercury has been accumulating in their bodies for many years. D) mercury and other heavy metals accumulate in the bottom of the ocean and not in the fish they eat.