Can you list the steps to the scientific method? It will be on your first test State the problem 2. Gather Information 3. Form a hypothesis 4. Test the hypothesis 5. Analyze data 6. Draw conclusion
What is missing ? What do you think of when you hear 32 degrees 32◦ ___ (SCALE) Fahrenheit, Celsius, Kelvin United States Scientist & majority other countries Measures VERY high Or VERY low temps. 32◦ Fahrenheit 32◦ Celsius = 89◦ Fahrenheit 273◦Kelvin
A. Standard- exact quantity that people agree to use for comparison B. Measurements must have a number and a unit .
1. SI – (International system of standards) an improved version of the metric system used and understood by scientists worldwide. 2. SI system is based on multiples of 10 and uses prefixes to indicate a specific multiple.
Lengthis measured using a unit appropriate for the distance between two points. SI unit – meter (m) • Volumethe amount of space an object occupies. SI unit – liter (L)
Mass - measured of matter in an object. SI unit = kilogram (kg) What’s the difference between mass and weight? Mass = measure of matter (amount of “stuff” you are made up of)… your mass stays the same whether you are on Earth or the moon or Neptune Weight = mass + gravity pulling on that object …so you would weigh less on the moon since there is less gravity http://www.exploratorium.edu/ronh/weight/ Mass =Triple beam balance Weight Scale
What do you have to do with Italian salad dressing before using it? 1. Density - mass per unit volume of a material. 2. A unit obtained by combining different SI units is called a derived unit. Example: g/cm3 less dense
Time is the interval between two events; The SI unit for time is seconds (s) G. Temperature is measured using a thermometer. The SI unit of temperature is Kelvin (k)
1 2 3 MetersLitersGrams How do you use the “ladder” method? 1st – Determine your starting point. 2nd – Count the “jumps” to your ending point. 3rd – Move the decimal the same number of jumps in the same direction. Starting Point Ending Point __. __. __. 2 3 1 Ladder Method KILO1000 HECTO100 DEKA10 DECI0.1 CENTI0.01 MILLI0.001 __. 4 km = _________ m How many jumps does it take? 4. = 4000 m
MetersLitersGrams Conversion Practice Try these conversions using the ladder method. 1. 1000. 1600. 1000 mg = _______ g 1 L = _______ mL 160 cm = _______ mm 14 km = _______ m 109 g = ______ kg 250 m = _______ km .109 .250 14000.