Lesson 1.2 -Metric System , Conversion, Line Graphs

Question 1

What is qualitative data ?

Answer 1

describes a characteristic of what the object is

Question 2

What is quantitative data ?

Answer 2

describes a characteristic numerically ; measured and includes a count

Question 3

What is an example of a qualitative observation?

Answer 3

He is tall.

Question 4

What is one requirement of a controlled experiment ?

Answer 4

Observations should be as quantitative as possible so they are objective and repeatable.

Question 5

What are the metric units ?

Answer 5

The metric units are the meter for length, liter for volume, gram for mass, and the degree Celsius for temperature.

Question 6

What are some common base units?

Answer 6

Grams, Meters, Liters

Question 7

What is true regardless the type of measurement ?

Answer 7

The same prefixes are used to designate the relationship of a unit to a reference unit.

Question 8

What is the metric system ?

Answer 8

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.

Question 9

What is the difference between mass and volume ?

Answer 9

Mass is the amount of matter in an object while volume is how much space an object takes up.

Question 10

How many base units is the prefix “pico-“ ?

Answer 10

10 to the power of -12 base units or 0.000000000001

Question 11

What is the symbol for the prefix “kilo-“?

Answer 11

The symbol is (k).

Question 12

If your mass were 78 kg on the earth, how much would your mass be on the moon?

Answer 12

The same as on earth , 78kg.

Question 13

What is standard deviation ?

Answer 13

The amount of variation in a set of data.

Question 14

What is standard deviation commonly used to measure ?

Answer 14

The confidence in statistical conclusions.

Question 15

How do you find standard deviation?

Answer 15

Determine the mean, then find the variance and square it; your result is the standard deviation

Question 16

What is the difference between a standard deviation close to 0 and a high standard deviation ?

Answer 16

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.

Question 17

How do you find the mean / average of a data set ?

Answer 17

Add all the data points together and divide that sum by how many data points there are

Question 18

What is the median of a data set?

Answer 18

The median is the middle number of a data set from lowest to largest.

Question 19

What is the range of a data set?

Answer 19

The difference between the largest and the lowest data points.

Question 20

What are line graphs used for ?

Answer 20

To compare two variables and show specific values of data, trends, and relationships

Question 21

What is interpolation ?

Answer 21

Predictions with recorded data

Question 22

What is extrapolation ?

Answer 22

Predictions about data not yet recorded

Question 23

What is an independent variable and what is its other name?

Answer 23

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.

Question 24

What is a dependent variable and what is its other name ?

Answer 24

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.

Question 25

When making a graph, how much of the graph should your data take up?

Answer 25

After plotting your data points, you should take up at least 3/4 of your graph.