To develop a product that warms people's hands, would you use an exothermic or endothermic reaction? Why? Endothermic; that way the reaction will absorb heat.
B Exothermic; that way the reaction will absorb heat.
Endothermic; that way the reaction will release heat.
D Exothermic; that way the reaction will release heat.

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions

Producing disposable grocery bags consumes resources. recycling disposable bags is a solution that can recover some of the resources used to make new bags. which of the following behaviors could further refine the solution? a. disposing of bags by burning them b. reusing bags whenever possible c. using bags at once so that they do not break d. using only nonrenewable materials to make new bags subject is environmental science for apex users

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different