Unit 1 Scientific Method: Day 9 - Variables

BIG Idea: What?

·      The independent variable is what the scientist changes on purpose. They are in control of some aspect of that variable.

·      The dependent variable depends  the independent variable – the scientist does not control it, s/he just measures/observes it.

How do I identify them?

1)   Underline nouns - those are usually your variables.

2)   Look for what the scientist changes - that’s the independent variable.

3)   Look for what the scientist  measures - that’s PROBABLY your dependent variable.

CHECK YO’ SELF!

“Is the dependent variable  affected by what the scientist changes?”

THERE’S A PART 2?

How do I come up with a dependent variable?

1)   Decide what the scientist is changing (independent variable)

2)   Brainstorm things that might be affected by the different variables

3)   Make sure that it’s something the scientist can measure.

1. Complete "Now You Try On Your Own"

2. Complete the quiz below and tweet results by signing into Twitter using the following:

Sign-in:

email: kippcourage6science@gmail.com

password: courage2020

MAKE sure you add your FIRST and LAST NAME and # YOUR COLLEGE NAME (Example: #WM, #UH, #UT, #Houston) to the tweet.

It should look like this:

maria scored 80 / 100 on Independent vs. Dependent Variables http://t.co/JzFUTMmmn7 @ProProfs #wm
— Courageous Scientist (@elothescientist) September 9, 2014

Click here to take quiz.

Unit 1 Scientific Method Day 9

Variables, Lab Safety LW

Part 1: Picking dependent variables

Find the independent variable, then pick a dependent variable for the scientist.

1) Hayley is doing an experiment to find the healthiest soda brand.

Independent Variable: _____________________________________

What could be her dependent variable? _______________________________

2) Brenden wants to figure out if dogs or cats run faster.

Independent Variable: _____________________________________

What could be her dependent variable? _______________________________

3) Kala wants to convince her parents that her grades improve if she studies using an iPad.

Independent Variable: _____________________________________

What could be her dependent variable? _______________________________

Part 2: Lab safety rules review

Restate the following in your own words. Remember: STEP BACK, TELL IT BACK, CHECK IT

1) Wait for permission

2) Move carefully

3) Protect your eyes and nose

Unit 1 Scientific Method: Day 8 - Lab Safety The Official Rules

1) Handle with care

·      Hold objects with both hands or all five fingers.

·      If you drop something, do not attempt to clean it up without permission from the teacher.

2) Protect your eyes and nose

·      Wear safety goggles

·      Do not put scents to your nose.

3) Keep your skin safe

·      Wash your hands if necessary and wear gloves.

·      Tie back loose clothing/hair.

4) Move carefully

·      Walk, don’t run.

·      Watch your arms/books/stuff.

5) Wait for permission

·      NEVER taste, touch, etc. anything without permission from Mr. Miller.

·      Do not use the equipment in any way not instructed.

·      Do not remove anything from the lab.

Restate the Rules

We will restate, paraphrase, and rewrite a lot in science class! We will always follow these steps:

STEP BACK: Look away or take yourself away from the textafter you read it.

TELL IT BACK: Tell it back to yourself in your head as if you were telling it to a friend..

CHECK IT: Check to make sure you did not copy entire phrases from the text.

1. Complete your lab safety poster with your group.

2. Complete the "Now You Try on Your Own".

3. Review lab safety with the Jeopardy game below:

                                                                                  Lab Safety Lifework

Read the following information about lab safety symbols. Then use it to answer the questions. 

1) Draw the safety symbol that you might see on a bottle of a very dangerous liquid.

 

2) Draw the safety symbol that you might see when you are supposed to tie back your hair and loose clothing.

3) What do you wear to protect your eyes during a lab?

4) What do you wear to protect your skin and clothing?

5) What should you NOT do if you accidentally break glass during a lab?

6) After you finish with a lab, you should ___________________________ of chemicals and other

Laboratory materials and wash your ________________________.

Unit 1 Scientific Method: Day 7 - Lab Equipment Scenarios

Let’s review… Fill out the chart below using the pictures below:

Beaker		Used for measuring  and holding liquids.
Erlenmeyer flask		Used for holding liquids; ideal for measuring and mixing.
Test tube		To hold small amounts of different liquids
Graduated cylinder		Measures volume of liquids
Hot plate		To heat substances
Funnel		To pour substances into small openings
Pipette		Drop   small amounts of liquid
Stirring rod		Safely stir substances
Wash bottle		Rinse   and clean containers
Burner		Used to heat liquids (usually in test tubes) over a flame

As scientists, we need to understand our knowledge of lab equipment – what’s the use of just knowing about it?

HOW?

1) Underline the actions the person needs to take and ask yourself, “What's needed to do this?”

2) Pick the protective piece of equipment for safety and to avoid spills.

3) Think why?

Let’s Try Together as a Class

As part of a chemistry experiment, Ariana is pouring calcium chloride (small pellets) into a test tube. She is then going to pour water into the test tube.

She will need a beaker, funnel, and test tube because she will need them to complete the chemistry experiment correctly.

She will need goggles, a lab coat, and gloves because she wants to protect her hands, clothes, and eyes.