Conclusion! you were right ( or wrong)

1. Science method organized way of solving problems the steps are...( not always in this order) problem- /observation experiment - you may have to try this over and over) collect information- reading, data collection, research Conclusion! you were right ( or wrong) Hypothesis- ( if...then) share!!!!

2. some definitions just so you know!!! laws and theories! Laws- relate two or more items often in a math formula (teacher) laws of motion, law of conservation of mass, Law of gravity theory- long explainations of how, why, when etc. ( teacher) like big bang theory, theory of relativity, theory of evolution I

3. 1-2 name two of the first steps you might take in starting to work through the science method 3. state one of the hypothesis from last weeks lab in an if... then statement. 4. what did a vacuum have to do with friday's lab? 5 what is one of the last 2 steps of the science method? what does that mean?

4. In an experiment independant, dependant and control variabls - in a hypothesis, "If " is independent, the "then" is dependant. 0r in other words... I am changing independent, data is dependant

5. dependant goes up the side Independant variable goes across the bottem independent goes across the bottom when graphing control- all the other stuff that stays the same so you don't mess up your experiment!!!!

6. direct relationship, - two variables change the same way ( both increase or decrease)

7. inverse relationship- variables change in the opposite direction

8. measuring!!!! SI units!!! S I stands for system international!! means the whole uses this ( except USA) kilo hecto deca unit deci centi mili meter, liter gram 50 g __________________ miligrams 3.4 m ______________ kilometers cm3 = ml

9. area , volume and density m 3 cm2 g/ ml have a box that weighs 50 g, it measures 40 x30x20, what is it's density ? what is the smallest area ( smallest side) of the box?

10. precision and accuracy- both having to do with measuring in labs and experiments, and how well you do that!!! precision has to do with how repeatable you measure and record ( so always to the 10th place, or always read between the lines on the ruler and graduated cylender) the more precise you are, the more carefully you measure. Accuracy- means you are corrct!!!

11. significant figures!!! show precision, important for making sure others understand you numbers all numbers are significant, only write it if it is right!!! zeros aren't always significant! so if you measure 4.55655 grams of gold, ( and you want payed for it) it must have been measured. How to count and round with sig figs. all numbers and all zeros between or after numbers with decimals are signifcant. only place holder zeros and estimated zeros ( at end of number, no decimal) aren't significant 400 Has 1 ( just the 4) 4.50 has 3 4.5 has 2 .009 has 1 ( just the 9) .0098780 has 5, the 98780 4 5 sig figs 1 sig fig 4 sig figs 2 sig figs 3 sig figs

12. scientific notation! a way to make numbers more managable!!! 3091200000 = .0000008976 = if you are going to use it, one number to the left of the decimal, count how far you used the decimal for the exponant

13. percent error! tells how far off an experiment is from where it is supposed to be experiemental answer- expected answer answer times 100 expected answer lkj