Which of the following is evidence that a chemical reaction has taken place? Check all that apply. *

- unexpected color change
- release/absorb heat energy
- melt from solid to liquid
- solid precipitate forms
- gas bubbles form

What two temperature scales do scientists use

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

Which organism can most likely be classifild as domain bateria