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8/19 Daily Catalyst Pg. 3 Graphs

1. A scientist is studying if mice will gain weight when given an experimental drug. He gives 60 male mice the drug and then weighs them. What would be a good control group?

2. Eric and Alex are debating whether different amounts of glucose will affect the growth rate of bacteria in petri dishes. Identify the IV and DV in this experiment.

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8/19 Daily Catalyst Pg. 3 Graphs

1. A scientist is studying if mice will gain weight when given an experimental drug. He gives 60 male mice the drug and then weighs them. What would be a good control group?

A group of 60 male mice that have not been given the drug.

2. Eric and Alex are debating whether different amounts of glucose will affect the growth rate of bacteria in petri dishes. Identify the IV and DV in this experiment.

IV: Different amounts of glucose DV: Growth rate

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8/19 Class Business

Notebook page number homework check

Quiz #2 this Friday Unit #1 Test next Thursday

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8/19 Agenda

Daily Catalyst Class Business Daily Agenda Lab Graph notes Exit Ticket #1 Homework: graphing worksheet

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8/19 Daily Objective

Today, we will be able to utilize mathematics, organizational tools, and graphing skills to

solve problems and interpret data.

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Observation QuestionHypothesis

ExperimentAnalyze

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Lab Time

Directions: With your lab group, carefully read the lab directions. Complete the lab and carefully record data for today’s lesson. Labs are worth a test grade and are a privilege.

Time: 10 minutes Noise: 1 (with group)

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8/19 Pg.3 Graphs

Before we graph our data, we need to ORGANIZE our data.

We use TABLES to organize data.

VS

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Organize Data: Tables

 Tables: Title Units Data labels

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Organize Data:

Independent Variable Dependent Variable

3.4 6.7

Right sideLeft side

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Example:

Richard wants to test if the size of the shotput he throws affects how far he can throw it. He finds that he can throw a 1

pound shotput 50 meters, a 2 pound shotput 40 meters, a 3 pound shotput

30 meters, and a 4 pound shot 20 meters. Make a data table showing the

results.

What is the IV? What is the DV?

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Size of Shotput (lbs) How far he can throw it (m)

1 50

2 40

3 30

4 20

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Class Example: What is the IV & DV?

Minutes on Hot Plate

Temperature(°C)

0 255 3010 3515 40

IV DV

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Minutes on Hot Plate

Temperature(°C)

0 255 3010 3515 40

What is the relationship between minutes on a hot plate and

temperature?

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Next Step

Now we know how to ORGANIZE data into tables.

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Creating the perfect graph:

Graphs: 1. Title your graph 2. Label the axes 3. Scale your axes 4. Plot the points

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Step 1:Title your graph

Create a title for your graph so your audience knows what the graph is about.

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Step 2: Label the Axes

Indicates the variables X and Y axis

Y Axis

X Axis

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Step 2: Label the Axes

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A look back

Independent Variable Dependent Variable

3.4 6.7

Right sideLeft side

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Step 3: Scale your axes

Independent Variable (X axis)

Dependent Variable ( Y axis)

5 1

10 3

15 5

1 5 10 15

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Step 4: Plot your points

Use your table to plot the points in the graph.

Time (hours) Grades(percentages)

5 hours 41%

10 hours 70%

15 hours 87%

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Interpreting Graphs:

Always read the graph title Read the axes labels Look for units

On what day was the temperature the lowest in NYC?

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Class example:

Which quarterback had more passing yards after 10 games?

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Analyze Data

To analyze data, you look for a relationship Data will have one of 4 relationships:

Increasing Decreasing No change Random

When analyzing data, you will bring together the IV and DV-- NOTHING ELSE! Only use information that is in the table, don’t

bring in any other information.

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Relationships

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Class Example

Is the relationship increasing, decreasing,

no change or random?

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Class Example:

Is the relationship increasing, decreasing, no change or random?

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When would we used a…

Pie chart? Parts of a whole (100%)

Line graph? Change over time

Bar graph? Comparing data

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Turn and Talk

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The END!

Any questions?!

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Practice Time

Directions: As a group, complete the graphing worksheet. Be sure your teammates names are on the paper. When this paper is perfect, turn it into the basket.

Noise: 2 (group)

Time: 18 minutes

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Observation QuestionHypothesis

ExperimentAnalyzeConclusion

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Experimental Design Scenarios

As a group, design an experiment that will answer the provided question. Do not forget

the 6 steps of the scientific method. Be sure to include possible data, graphs and a

conclusion. You will be presenting a poster about your experiment on Wednesday.

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Exit Ticket #1

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Axe Murder Hollow Susan and Ned were driving through a wooded empty section of highway. Lightning flashed, thunder roared, the sky went dark in the torrential downpour. “We’d better stop,” said Susan. Ned nodded his head in agreement. He stepped on the brake, and suddenly the car started to slide on the slick pavement. They plunged off the road and slid to a halt at the bottom of an incline.

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Pale and shaking, Ned quickly turned to check if Susan was all right. When she nodded, Ned relaxed and looked through the rain soaked windows. “I’m going to see how bad it is,” he told Susan, and when out into the storm. She saw his blurry figure in the headlight, walking around the front of the car. A moment later, he jumped in beside her, soaking wet. “The car’s not badly damaged, but we’re wheel-deep in mud,” he said. “I’m going to have to go for help.”

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Susan swallowed nervously. There would be no quick rescue here. He told her to turn off the headlights and lock the doors until he returned.

Axe Murder Hollow. Although Ned hadn’t said the name aloud, they both knew what he had been thinking when he told her to lock the car. This was the place where a man had once taken an axe and hacked his wife to death in a jealous rage over an alleged affair. Supposedly, the axe-wielding spirit of the husband continued to haunt this section of the road.

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Outside the car, Susan heard a shriek, a loud thump, and a strange gurgling noise. But she couldn’t see anything in the darkness.

Frightened, she shrank down into her seat. She sat in silence for a while, and then she noticed another sound. Bump. Bump. Bump. It was a soft sound, like something being blown by the wind.

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Suddenly, the car was illuminated by a bright light. An official sounding voice told her to get out of the car. Ned must have found a police officer. Susan unlocked the door and stepped out of the car. As her eyes adjusted to the bright light, she saw it.

The END

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Hanging by his feet from the tree next to the car was the dead body of Ned. His bloody throat had been cut so deeply that he was nearly decapitated. The wind swung his corpse back and forth so that it thumped against the tree. Bump. Bump. Bump.

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Susan screamed and ran toward the voice and the light. As she drew close, she realized the light was not coming from a flashlight. Standing there was the glowing figure of a man with a smile on his face and a large, solid, and definitely real axe in his hands. She backed away from the glowing figure until she bumped into the car.

“Playing around when my back was turned,” the ghost whispered, stroking the sharp blade of the axe with his fingers. “You’ve been very naughty.”

The last thing she saw was the glint of the axe blade in the eerie, incandescent light.

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Why are conclusions important?

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What makes a good conclusion? Was your hypothesis right or wrong? What mistakes were possibly made? What does your data mean? If you were to repeat this experiment, what

would you change? Why is the data you found important? Can you draw any relationships?

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Look at this…

Amount of water (liters)

Tree Growth (meters)

2 5 4 106 158 20

Changes by 2 each time

Changes by 5 each time

If you give a tree 10 L of water, how many meters do you think it would grow?