Scientists find evidence of a large meteor impact on the coast of the Yucatán Peninsula in Mexico. What can the scientists most likely expect to find in the layers of rock that are about the same age as the impact?

The crust of earth may a- continets and ocean floors. b-continents only. c-layers of sedimentary rocks and continents. d-all of the above

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .