3.1 - Measurement
3.2 - Math & Science
3.3 - Graphs in Science
3.4 - Models as Tools in Science
Random
100
What are the basic units for the following measurements: - Length - Mass - Volume - Temperature
- Length = meter - Mass = kilogram - volume = liter - Temperature = Celsius
100
What do scientists rely on when they cannot get an exact number?
estimate
100
Draw a sample line graph and label the following parts: - x-axis - y-axis - origin
x-axis = horizontal (left to right) y-axis = vertical (up and down) origin = the point (0,0)
100
Name the three things ALL systems have and the one thing SOME systems have.
- input, process, and output - feedback
100
What number is the metric system based on?
10
200
Calculate the following densities (they must be labeled correctly to get the points!) a) an object has a volume of 12.5 cm3 and a mass of 40 grams b) a liquid has a mass of 38.25 grams and a volume of 9 mL
a) 3.2 g/cm3 b) 4.25 g/mL
200
Calculate the MEAN and MEDIAN for the following numbers: 7 8 5 7 8 11 10
Mean = 8 Median = 8
200
Draw the following graphs: - linear graph - nonlinear graph
linear graph = straight line nonlinear graph = curved line or no trend
200
Why do scientists use models?
to understand things they cannot observe directly.
200
Tell which tool is used to measure the following: a) length b) liquid volume c) mass d) temperature e) time f) volume of an irregular object
a) metric ruler b) graduated cylinder c) triple beam balance d) thermometer e) stop watch or clock f) graduated cylinder (water displacement)
300
a) What is volume? b) How do you find the volume of a regular shaped object (tissue box)
a) Volume is the amount of space something takes up. b) V = L x W x H
300
Find the MODE and RANGE for the following numbers: 21 26 24 26 20 30 33 20
Mode = 26 AND 20 Range = 10
300
a) Which axis is the responding variable on? b) Which axis is the manipulated variable on?
a) y-axis b) x-axis
300
Give two examples of models.
-
300
Why do we draw trend lines on graphs?
To see the pattern or relationship between the variables.
400
Explain the steps involved in finding the volume of an irregular object (rock).
1) Fill a graduated cylinder with water (30 mL). 2) Drop the object into the water - the water level will rise. 3) Read the new water level. 4) Calculate the different between the ending water level and the beginning water level. **WATER DISPLACEMENT**
400
What is the difference between accuracy and precision?
Accuracy is how close a measurement is to the true value. Precision is how close a group of measurements are to one another.
400
What are three things scientists use line graphs for?
1) identify trends 2) make predictions 3) recognize anomalous data
400
How is the input of a system different from an output?
An input is the material or energy that goes IN to a system. The output is the material or energy that comes OUT of a system.
400
What is the name of the curve on the surface of water in a graduated cylinder?
meniscus
500
Using "King Henry", convert the following measurements: a) 12.3 mL = ____________ L b) 0.09 kg = ____________ cg c) 1.08 cm = ____________ mm
a) 0.0123 L b) 9000 cg c) 10.8 mm
500
While doing an experiment, Sally calculated the density of honey to be 1.5 g/mL. The true value of the density of honey is 1.36 g/mL. Calculate the percent error for the density Sally measured. Round to the nearest tenth.
Percent Error = 10.3 g/mL
500
Give another name for the following variables: a) responding b) manipulated
a) dependent b) independent
500
An iPod is an example of a system. Determine which of the following is the input, process, and output. a) The digital file is converted to sound waves. b) The iPod plays the song (you can hear the music). c) Push the Play button.
input = Push the Play button. process = The digital file is converted to sound waves. output = The iPod plays the song
500
Using SIG FIGS, follow the steps to correctly multiply the following measurements: 1.25 meters x 5.5 meters a) How many sig figs are in 1.25? b) How many sig figs are in 5.5? c) How many sig figs can your answer have? d) Multiply the measurements and write your answer with the correct number of sig figs. Make sure to round correctly!
a) 3 sig figs b) 2 sig figs c) 2 d) 6.9
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