Lesson 1.2 -Metric System , Conversion, Line Graphs Flashcards
What is qualitative data ?
describes a characteristic of what the object is
What is quantitative data ?
describes a characteristic numerically ; measured and includes a count
What is an example of a qualitative observation?
He is tall.
What is one requirement of a controlled experiment ?
Observations should be as quantitative as possible so they are objective and repeatable.
What are the metric units ?
The metric units are the meter for length, liter for volume, gram for mass, and the degree Celsius for temperature.
What are some common base units?
Grams, Meters, Liters
What is true regardless the type of measurement ?
The same prefixes are used to designate the relationship of a unit to a reference unit.
What is the metric system ?
A decimal system of measurement so it is easy to convert one measurement to another either by multiplying or dividing by a multiple of 10.
What is the difference between mass and volume ?
Mass is the amount of matter in an object while volume is how much space an object takes up.
How many base units is the prefix “pico-“ ?
10 to the power of -12 base units or 0.000000000001
What is the symbol for the prefix “kilo-“?
The symbol is (k).
If your mass were 78 kg on the earth, how much would your mass be on the moon?
The same as on earth , 78kg.
What is standard deviation ?
The amount of variation in a set of data.
What is standard deviation commonly used to measure ?
The confidence in statistical conclusions.
How do you find standard deviation?
Determine the mean, then find the variance and square it; your result is the standard deviation
What is the difference between a standard deviation close to 0 and a high standard deviation ?
A SD close to 0 means that the data points are very close to the mean. A high SD means that the data points are spread over a wide range of values.
How do you find the mean / average of a data set ?
Add all the data points together and divide that sum by how many data points there are
What is the median of a data set?
The median is the middle number of a data set from lowest to largest.
What is the range of a data set?
The difference between the largest and the lowest data points.
What are line graphs used for ?
To compare two variables and show specific values of data, trends, and relationships
What is interpolation ?
Predictions with recorded data
What is extrapolation ?
Predictions about data not yet recorded
What is an independent variable and what is its other name?
An independent variable is the factor that is changed or manipulated. It is always on the x-axis of a graph. Another name for it is a manipulated variable.
What is a dependent variable and what is its other name ?
A dependent variable is the factor that is measured and changes as a result of the independent variable. It is always on the y-axis of a graph. Another name for it is a respondent variable.
When making a graph, how much of the graph should your data take up?
After plotting your data points, you should take up at least 3/4 of your graph.
