SPI 0807.Inq.1 (Variables and Controls)Bellwork 8/25/2015

1. Find the perimeter of an object that has sides 8cm, 13cm, 8cm, and 13cm.

2. Find the density of a cube if the mass is 10g and the volume is 60 mL.

3. Find the area of a book that is 12 cm long and 7 cm wide.

4. Find the volume if the length is 8cm, the width is 10cm, and the height is 7.

5. Find the volume of the person in the picture.

SPI 0807.Inq.1 (Variables and Controls)Bellwork 8/25/2015

1. Find the perimeter of an object that has sides 8cm, 13cm, 8cm, and 13cm.

2. Find the density of a cube if the mass is 10 g and the volume is 60 mL.

3. Find the area of a book that is 12 cm long and 7 cm wide.

4. Find the volume if the length is 8cm, the width is 10cm, and the height is 7.

5. Find the volume of the person in the picture.

42cm

1/6 g/mL

84 cm2

560cm3

1.6mL

SPI 0807.Inq.1 (Variables and Controls)Agenda 8/25/2015

• Review Bellwork• Emphasize Today’s Objective• Check definitions• Notes on Independent Variable• Work on measurement worksheet and study

guide

WRITE THIS IN YOUR AGENDA!Homework: Study for quizDo measurement worksheet

SPI 0807.Inq.1 (Variables and Controls)Notes 8/25/2015

1. Independent Variable is the variable you choose to test or change.

2. Dependent Variable is the variable being measured or observed in an experiment.

3. Hypothesis is a possible answer to a question or a solution to a problem.

4. Procedure is the steps that are taken to solve a problem or answer a question

Analysis is looking at results, data collected for example, to decide if the question was answered or the problem solved.Controlled variable is the variable that is held constant in an experiment.

Notes ScienceSPI 0807.Inq.1 (Variables and Controls)

Step 1: Make ObservationsStep 2: Ask A QuestionStep 3: Form A HypothesisStep 4: Test The Hypothesis By doing experimentsStep 5: Analyze The ResultsStep 6: Draw ConclusionsStep 7: Communicate results

Scientific Method

(In List Format)

Variables and Controls in Experiments Used with the scientific method

Use independent variables when you test your hypothesis by doing experiments (see step 4 above)

SPI 0807.Inq.1 (Variables and Controls)Notes Science

Experiments In an experiment you should conduct multiple trials

SPI 0807.Inq.1 (Variables and Controls)Notes Science

How many? More is better! Experiments should include independent variables,

dependent variables, constants, and controls.

Experiments (F.Y.I): You test or measure a quantity and/or quality of

something.

SPI 0807.Inq.1 (Variables and Controls)Notes Science

Example: Measuring Quantity:Scientists could be testing a new cell phone battery to determine how long it will last when you are text messaging.

Example: Measuring Quality:Scientists could be testing new IPod ear buds to determine if they are more comfortable or not.

In an experiment… …you should only test for ONE key thing at a time When you repeat the experiment… …only change this ONE key thing

This one thing is called…

Independent Variables

SPI 0807.Inq.1 (Variables and Controls)Notes Science

Also know as….the manipulated variable

Memory Trick

Independent variable begins with the letter “I” So remember the letter “I.” Imagine yourself doing the experiment., and ask yourself…

“What ONE thing will I change when repeating the experiment?”

That one thing will be…

SPI 0807.Inq.1 (Variables and Controls)Notes Science

Also know as….the manipulated variable

Let's take a moment to watch anddiscuss a video-song about this topic

Link: Variables Song by Mr. Edmonds

Video Review

SPI 0807.Inq.1 (Variables and Controls) Science

The independent variable is the type of soft drink

Example: You decide to do an experiment to determine the reason certain soft drinks are more popular that others. You suspect that the popularity of the drinks is connected with the amount of sugar found in them. You decide to use Dr. Pepper, Coke, Pepsi, and Barq's root beer. You first determine how much sugar each drink contains. Then you get 6 students to do a blind taste test with all 4 drinks.

What is the independent (manipulated) variable in this example?In other words, what is the one thing being tested for or changed?

Example: A scientist is conducting an experiment to test how sunlight affects plant growth.

The independent variable is the distance from the sunlamp which is connected with the amount of sunlight.

She places one corn plant 1 meter away from a sunlamp. She places one corn plant 2 meters away from a sunlamp. She places one corn plant 3 meters away from a sunlamp.

Corn plant 01 Corn plant 02 Corn plant 03

What is the independent (manipulated) variable in this example?In other words, what is the one thing being tested for or changed?

Example: A student conducts an experiment with ten 8th gradestudents. He uses 3 similar types of sour candy in a series of 4trials. (Sour Patch Kids, Sour Skittles, and Warheads) He gives1 piece of candy to each student and records their facial

expressionsto estimate how sour each candy is.

The independent variable is the type of sour candy

What is the independent (manipulated) variable in this example?In other words, what is the one thing being tested for or changed?

Example: A student conducts an experiment to determinewhich type of glue works best for attaching two pieces of regularwriting paper together.

The independent variable is the type of glue

She places 2g of glue on each sheet of paper and then uses a spring scaleto measure how much force it takes to pull the sheets apart.

What is the independent (manipulated) variable in this example?In other words, what is the one thing being tested for or changed?

Liquid-washable Glue Stick-washable Glue Stick-nonwashable

She uses 3 types of Elmer’s glue in a series of experiments.

Example: A student conducts an experiment to determine whichink color in ballpoint pens will last the longest before running out.

The independent variable is the color of ink

She uses 3 ink colors in 3 ballpoint pens in a series of experiments. (1) Black ink pen, (2) Blue ink pen, (3) Red ink pen)

She copies text from her science book. She copies the same text over and over.She writes at the same speed. The room temperature remains the same. Shewrites on the same kind of paper each time.

What is the independent (manipulated) variable in this example?In other words, what is the one thing being tested for or changed?

Here is an example of a question you might see on a quiz or test.

Questions ScienceSPI 0807.Inq.1A (Independent Variables)

Here is an example of a question you might see on a quiz or test.

Questions ScienceSPI 0807.Inq.1A (Independent Variables)

Here is an example of a question you might see on a quiz or test.

Questions ScienceSPI 0807.Inq.1A (Independent Variables)

Here is an example of a question you might see on a quiz or test.

Questions ScienceSPI 0807.Inq.1A (Independent Variables)

Here is an example of a question you might see on a quiz or test.

Questions ScienceSPI 0807.Inq.1A (Independent Variables)