Gasoline is a mixture of hydrocarbons (mostly 'octane'). When combined with oxygen and a spark is added, most (but not all) of these reactants are converted --> CO2 + H20. What is the favored direction of this reaction, and why do the reactants not entirely convert to CO2 + H2O?

Which are evidence of seafloor spreading? check all that apply. molten material magnetic stripes continent material drilled core samples ocean water samples

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed

Which describes the habitat of a frog?