Ch. 1 Grudgeball

Variables and Scientific Method

100

Fill in the blank:

The scientific method is a _____ process that scientists use to answer questions and solve problems

Fluid

200

This variable is the variable that is measured in the experiment.

Dependent variable

300

List the steps of the scientific method in order

Observe, Hypothesize, Experiment, Collect/Analyze Data, Conclude

400

A botanist (someone who studies plants) wants to study the effects of different liquids on plant growth. 

For the experiment, the botanist decides to feed the plants water, pineapple juice, and Dr. Pepper. The botanist gives the same amount of each liquid to 3 different plants and measures their height after 2 weeks.

Identify the independent variable, dependent variable, and controlled variable in this experiment.

Independent= Type of Liquid

Dependent= Height of Plant

Control= Amount of Liquid

500

Explain why it is important for scientists to have controlled variables AND provide an example of an experiment where not having a controlled variable would affect the experiment.

Controlled variables are necessary because changing more than one variable at a time makes it difficult to figure out which variable affected the results.

Example experiments will vary.

Unit Conversions

100

Using the mnemonic device provided in class, give me the prefixes in order

BE EXACT IN YOUR DELIVERY OF YOUR ANSWER!!!!

Mega...

Kilo

Hecto

Deka

Unit Base

Deci

Centi

Milli...

Unexpectedly/Mysteriously

200

32 m into cm 

3200 cm

300

15,000 ms into das

1.5 das

400

0.881 ML to L

881,000 L

500

915 µg into kg

Then turn this number into scientific notation

0.000000915

9.15x10^-7

Dimensional Analysis

100

The following example gives you the start to a dimensional analysis problem. The goal is to turn yards into feet. Where will the yards go in the next ratio to make sure we correctly set up our problem?

35 yd                                         ft

Next ratio: 1 yd/3ft

Bottom of the fraction bar (in the demoninator)

200

40,400 mm into ft

Round to the nearest whole number

133 ft

300

72 mi/hr into km/hr

Round to the nearest whole number

116 km/hr

400

11.25 L into fluid ounces

NEEDED RATIO NOT ON THE BOARD:

1 cup= 8 fluid ounces

Round to the nearest whole number

381 fl oz

500

45 mi/hr into m/s

Round to the hundredths place

20.16 m/s

Graphing

100

What are three absolutely necessary and crucial parts of any graph

Titles

Labels

Scales

Keys 

200

In the graph below, answer both of these questions:

- What is one way the setup of this graph could be improved?

- According to the infograph, what age group drinks the most energy drinks?

1.) No labels OR provide more info on type of energy drink

2.) 10-18 Year Olds

300

From the graph below, state the independent variable and the dependent variable

Independent= Country

Dependent= Percent of people owning phone

400

For the following four scenarios, which type of graph would be the best to use to present the data?

- How much of a worker's paycheck was spent on groceries, how much was spent on gas, how much was spent on entertainment, how much was spent on utilities, etc.

- The amount of rainfall each month for a year

- The number of A's, B's, C's, D's, and F's on Mr. Cline's recent weekly quiz

- The ethnicity breakdown in PSHS

1.) Pie

2.) Line

3.) Bar

4.) Pie

500

The graph below shows the change in gun ownership from the years of 2000-2020.

Choose two of the spikes in gun ownership and attempt to give a THOROUGH explanation of why these spikes can be seen.

1st Spike= Obama election...a president's policies on gun ownership can determine the amount of guns bought

2nd Spike= Sandy Hook Shooting...parents and guardians fear for the safety of their children mixed with patriotism

3rd Spike= Coronavirus...general population spends a lot more time at home and wants to ensure safety.

Scientific Notation

100

What sign would the exponent have for the following number, and how many decimal jumps would be necessary?

0.00073

Negative Exponent

4 jumps

200

What's the purpose of using scientific notation?

To condense really long numbers into a more readable format. This practice saves space on papers and time when relaying results from a study.

300

Convert 8.24x10⁶ into extended notation

8,240,000

400

Convert 0.000000000000000000000000000000000000000001 into scientific notation

1x10^-42

1.00x10^-42

500

Count the number of spheres hanging from Mr. Cline's ceiling. Convert this number into scientific notation.

78

7.8x10¹