Which process causes Earth's surface to warm? the conduction of heat by air above Earth's surface
the radiation of the Sun's electromagnetic waves
the convection of warm air from the atmosphere
the reflection of electromagnetic waves off bodies of water

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction