chapter 2 study
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What number is the metric system of measure based on? | 10
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| What is the basic unit of length in the metric system? | Meter
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| What should scientists rely on if they cannot obtain exact numbers? | Estimation
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| Percent error (calculations) | A way to determine how acurrate an experimental value is.
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| What way does a horizontal axis of a graph run? | Left to right.
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| What graph has data points that do not fall along a straight line? | Nonlinear graph.
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| A system is a what that works together to perform a function | Group
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| How many sig figs are in the number 8.0025 | 5
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| What is a group of parts that work together? | A system.
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| Median | The middle number in a set of data.
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| Density is the measure of how much mass in a given what? | Volume
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| What is the curve on the surface of water in a graduated cylinder? | Meniscus
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| What is a common tool used to measure length. | A meter stick.
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| What would your result be if you had a high percentage error? | The result would be not acurrate.
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| Calculate to the correct number of sig figs in the problem 1.2 + 2.55? | 2
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| True or false - To measure the mass a of a small insect, scientists would use a gram or kilogram | False, milligram.
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| True or false - SI is a version of the metric system. | True
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| True or false - A scientists would most likely use the Kelvin scale to measure daily temperature. | False, Celcius.
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| True or false - When multiplyiing or dividing measurements, the answer has the same number of sig figs as the measurment with the most sig figs. | False, fewest.
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| How many sig figs are in the number 0.00235 | 6
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| What is the point where the X axis and the Y axis cross called? | origin
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| Why can’t you use a ruler to measure the volume of an irregular object such as a rock? How could you measure the volume of the rock | you cannot measure the volume of the rock with a ruler because of its irregular shape. But you can put the rock in water and measure how much the water level rises (water displacement).
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| what is accuracy and precision? | Acuracy refers to how close a measurement is to the true or accepted value. Precision refers to how cose a group of measurements are to each other.
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| What are the properties of a system, and what is an example of one? | All systems have an input, process, output, and feedback. An example of a system would be a bicycle.
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| How do you measure the volume of a rectangular solid? | Length*width*height.
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| Estimate | An approximation of a number based on reasonable assumptions.
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| Mean | The numerical average of a set of data.
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| Mode | The first number that appears most often in a list of numbers
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| Range | A set of data is the difference between the greatest value and the least value in a set.
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| Linear | A line graph on which the data points yeild a straight line.
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| Anomalous data | Data that do not fit in the rest of a data set.
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| How do you calculate density? | Mass divided by volume.
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| What is the SI unit for temperature? | Kelvin. But it can be degrees celcius.
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| How do you make a line graph? | Identify the variables, determine the scale of the graph, number and label each axis, plot the data points, draw the graph, title the graph.
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