A prospector pans for gold in a stream. Which term best describes what is in her pan when she scoops up part of the stream bed?
1.compound
2.pure substance
3.mixture
4.element

What are the genotypic and phenotypic ratios

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.