Sound and light are both found as (4), with a variety of (5). The sun, a source of light waves specifically, releases a type of (6). The sun emits invisible (7). It can be found as UVA or UVB types. These lights give off different levels of (8), some of which can be harmful.

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