try these: how many sig figs in the following?.00234 20,002 29,000 2.3000 solve 12.1012cm + 20.234cm...

Try These:

How many Sig Figs in the following?.0023420,00229,0002.3000Solve

12.1012cm + 20.234cm + 11.12cm=

2.345cm X 11.023cmX.0023

Oh Wow…We need a review• Homogeneous Mixture-something consistent throughout

Ex: Salt water• Heterogeneous-Mixed composition throughout Ex:

Alphabet soup, Sample of Dirt• Element- Basic Building Block (See Periodic Table) Ex: N,I,O• Compound-composed of elements

– Ex: CO2

• Pure substance can’t be separated with out a change of composition (O2, NaCl (salt), H2O) can be elements or compounds

How does significant digits relate to tools in science?

• Significant Digits show how precise a tool is• Precision is How close measurements are to

each other• This is different than accuracy which is how

close you are to the correct answer

Explain what a precise dart player would look like. How would this compare to an accurate player?

What is in a Good Procedure?

What does it mean Control a procedure?

• In a controlled experiment everything is the same except for the manipulated variable

How does this relate to an experimental control?

• An experimental control determines if the environment has any affect on the data

You will design an experiment to determine the affect of

temperature on Reaction Rate• Available Materials• Beakers, Ice, Water, 3 polident tablets,

graduated cylinders