Warm Up-September 7 th. Flower Power
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SpongeBob loves to garden and wants to grow lots of pink flowers for his pal Sandy. He bought a special Flower Power fertilizer to see if it will help plants produce more flowers. He plants two plants of the same size in separate containers with the same amount of potting soil. He places one plant in a sunny window and waters it every day with fertilized water. He places the other plant on a shelf in a closet and waters it with plain water every other day.
What did SpongeBob do wrong in this experiment? Explain.
What should SpongeBob do to test the effectiveness of Flower Power fertilizer?
Stacy decided to do an experiment to test which brand of artificial sugar tasted the most like real sugar. In the experiment she tested three different brands Splenda, Equal and Stevia.
Name the independent variable, dependent variable and at least 3 controls in Stacy’s experiment.
Which SI unit would you probably use to express the height of your desk?
What would be the appropriate tool to use when measuring the mass of a spoon?
Ms. Gould is measuring small amounts of liquid chemicals out to be used in an experiment. Name the tool and SI unit that she is most likely using.
Kilo - k
To convert to a smaller unit, move decimal point to the right or multiply.
Hecto - h
Deka - da
(g, m, L)
Deci - d
To convert to a larger unit, move decimal point to the left or divide.
Centi - c
Milli - m
1.) 1000 mg = 1 g 3.) 109 g = ____ kg
2.) 160 cm = 1600 mm 4.)14 km = ____ m
Once you master the stairs, decimal hopping should become easier. Since the metric system is set up by powers of ten all we have to do is move the decimal point to change units.
If you are moving to a LARGER unit move the decimal to the LEFT.
If you are moving to a SMALLER unit move the decimal to the RIGHT.
Moving to a larger unit…
33 m = ____ km 1st place your decimal point
33. m = ____ km 2nd, how many places away is km from m? Larger moves LEFT.
33. m = ____ km
33. m = .033 km
Moving to a smaller unit…
67.2 dm = ____ mm 1st the decimal is placed, we will start hopping from that point
67.2 dm = ____ mm 2nd , how many places is dm from mm?
67.2 dm = ____ mm
67.2 dm = 6720 mm
Example: how many seconds are in 50 hours?
Put the known quantity in the upper-left space: