1. Copy homework 2. Look at the 2 handouts with your shoulder partner. Read some of the different scientific theories and laws. 3. In your science notebook, compare and contrast scientific theories and laws. (Skip a few lines between each definition so you can add to them.)

1. Copy homework and take out a sheet of bellwork paper. 2. Look at the vocabulary words on the cabinets in the back of the room. 3. Pick 2 words from each cabinet (you will have 6 total) and create a fill-in-the blank quiz question for each of them. Do NOT show your teammates! (You can use your notes and Ch 1 for help) Example) The ________ variable is what you measure in an experiment.

Benefits (advantages/rewards for doing it) Benefits (advantages/rewards for NOT doing it) Costs (disadvantages/risks for doing it) Costs (disadvantages/risks for NOT doing it)

Ch 2 Lessons 2-3

 Used by scientists to test their ideas about things they cannot observe directly

 Well-tested explanation for a wide range of observations and experimental results  They become better accepted as more and more scientists collect observations that add to the explanation  Exs) Atomic Theory – all substances made of atoms Big Bang Theory

A statement that describes what scientists expect to happen every time under a particular set of conditions For examples) 1. Law of Gravity 2. For every action, there is an equal and opposite reaction

 Why?