1.2 Study Guide

Question 1

How many base units does the prefix ‘micro’ represent?

Answer 1

One millionth or 1/1,000,000

Question 2

How many kilograms are in 24 milligrams?

Answer 2

0.000024

Question 3

Is a picoliter larger or smaller than a nanoliter? By how many powers of 10?

Answer 3

A picoliter is smaller than a nanoliter. It is smaller by 3 powers of 10 (1000 times smaller).

Question 4

Out of these units of measurement, which would you be most likely to use to measure the length of a pencil?: Meters, Kilometers, Centimeters, Micrometers

Answer 4

Centimeters

Question 5

Would an average human be likely to survive in 75 degrees C. weather?

Answer 5

No, 75 degrees C. is exactly 167 degrees F., which is much too hot for a human to survive.

Question 6

What is the definition of Mass? How does it differ from the definition of Volume?

Answer 6

Mass is a measure of the amount of matter in an object. Volume is a measure of the amount of space an object takes up. Space doesn’t equal mass most of the time, as denser objects can take up less space but have higher masses due to their particles being closer together.

Question 7

What is the definition of Length? What is an example of a situation in which one may need to measure Length?

Answer 7

Length is the distance between two points. An official in a Long-Jump competition would need to measure Length many times to determine the longest jump.

Question 8

If a ruler has markings every 1 unit, how many decimal places low can you go in your measurement?

Answer 8

1 (tenths place)

Question 9

What is the rule for the number of decimal places you can go in a measurement?

Answer 9

You can go 1 decimal place lower than the digit intervals on the measuring device. For example, if a ruler measures in tenths, you could measure down to the hundredths place.

Question 10

How would one find the mean of a numerical data set?

Answer 10

Find the sum of all the data points and divide it by the total number of data points.

Question 11

In a paragraph, explain the process for finding the standard deviation of a numerical data set.

Answer 11

(Structure:) Find the mean of the data points–>Find differences between data points and mean–>Square differences and find the average of the results (the variance)–>Take the square root of the variance. The result is the standard deviation.

Question 12

What is the exact middle of a numerical data set called?

Answer 12

The median

Question 13

Which axes do the Independent Variable and Dependent Variable each belong to on a graph?

Answer 13

The Independent Variable belongs on the x-axis and the Dependent Variable belongs on the y-axis.

Question 14

What type of variable relationship is characterized by one variable consistently increasing while the other is consistently decreasing?

Answer 14

An indirect relationship

Question 15

(using the clam practice graph as an actual question) What kind of variable relationship is portrayed here? Using CER, make a claim based on evidence from this graph.

Answer 15

This graph portrays a peak relationship. (Structure:) Claim: Clams naturally live in water that is 30 degrees C. Evidence: data points, likely including 30 degrees C. and one or two of each hotter and colder temperatures. Reasoning: 30 degrees had the most clams developing and surviving; organisms naturally adapt to survive the best in their natural environments, thus clams’ natural environment is 30 degrees C. water.

Question 16

Showing blank graph template Plot data points on this graph template that represent a direct variable relationship. Draw the best fit line.

Answer 16

The plot points would show the variables increasing and decreasing with each other and, in a standard graph, the line would go from the bottom right to the top left.