Metric Conversions
At the top of your whiteboard, correctly write the full Metric Ladder starting with (K)Kilo and ending with (m)Milli.
Abbreviation and prefix.
K(Kilo) -> H(Hecto) -> D(Deka) -> BASE(meter,liter,gram) -> d(deci) -> c(centi) -> m(milli)
> , < , or =
(hint: convert 1 side to match the other)
1 meter ___ 100 centimeters
=
1 meter is equal to 100 cm
A student changes the amount of sunlight a plant receives and measures its growth. What is the independent variable?
Amount of Sunlight
At the top of your whiteboard, correctly write the full Metric Ladder starting with (K)Kilo and ending with (m)Milli.
Abbreviation and prefix.
K(Kilo) -> H(Hecto) -> D(Deka) -> BASE(meter,liter,gram) -> d(deci) -> c(centi) -> m(milli)
The variables that are intentionally kept the same during an experiment.
Constants / controlled variables
Convert 4500 milliliters to liters.
4.5L
> , < , or =
(hint: convert 1 side to match the other)
500 milliliters ___ 1 liter
<
500mL is less than 1 liter
A student tests whether the amount of sleep affects reaction time.
What is the dependent variable?
Reaction time
0.00725 HL → cL
72.5 cL
The variable that is measured or observed.
Dependent variable (it's usually a number!)
Convert 3.7 kilograms to milligrams.
3,700,000mg
> , < , or =
2.5 kilograms ___ 2400 grams
>
2.5kg is greater than 2400g
A student changes the water depth and measures how long a candle continues burning under an upside-down jar.
What is the independent variable?
Water depth
Convert 0.063 Hm → mm
6,300 mm
A student tests whether sunlight affects plant growth.
Name two things that should be kept constant.
type of plant, amount of water, amount of soil, pot size, brand/type of soil, source of water, temperature, etc.
Convert 625 centimeters to decimeters.
62.5 dm
> , < , or =
7.5 hectometer _______ 700 meter
7.5 hectometers is greater than 700 meters.
A student wants to know whether the amount of exercise affects heart rate.
Identify both the independent variable and the dependent variable.
IV - amount of exercise
DV - heart rate (this would be in beats per minute)
Convert 47.5 dm → mm
4,750 mm
A student tests how ramp height affects the distance a toy car travels.
Why should the student use the same toy car for every trial?
To keep the car constant and ensure a fair test
Convert 1m to cm
100cm
> , < , or =
0.035kg ______ 35 decigrams
>
0.035kg is greater than 35 decigrams
A student investigates whether screen brightness affects how quickly a phone's battery drains.
Identify the IV and the DV.
IV - screen brightness (the unit is usually in nits)
DV - Time for battery to drain (from 100 to zero, or from a certain number to a certain number)
Convert 8.4 dekameters to millimeters.
84,000 mm
A student wants to determine whether the amount of weight in a backpack affects walking speed. The same student walks the same hallway carrying backpacks of different weights while another student records the time.
Identify the IV, DV, and TWO constants.
IV - weight of backpack.
DV - walking speed/time
Constants = same student, same distance, same hallway, same measuring method, same temperature, same shoes, same time of the day, etc.