1. Practice of Science D5
8th Grade Science

2. Experimental Design Bellringer
Part 1:
Which method would allow you to study the behavior of a tiger in its native habitat in India?
Part 2:
Explain what type of scientific inquiry this is.
A) going to a zoo B) conducting a field study C) designing a controlled experiment D) collecting data from similar species

3. Flip Work NEW work for next class!
Check Designing an Experiment work completion
NEW work for next class!
Study your notes from Practice of Science unit.
Enter Vocabulary for Properties of matter into journal. (this will be assigned in your class homework page on MAC website)

4. Unit test next class!!!
Be sure to memorize the information learned in the class over the last few weeks.
This Photo by Unknown Author is licensed under CC BY-SA

5. Dry Ice Safety
NOTE: Whenever you use dry ice, always be aware of the rules for handling it safely.
This is not a toy. It’s for demonstration purposes only.
Use dry ice only with adult supervision.
Dry ice must be handled using heavy gloves or tongs. It will cause severe burns if it comes in contact with bare or unprotected skin. It can be as cold as -170° F (-112° C).
Always wear safety goggles when handling dry ice. The debris and shards are extremely dangerous to your eyes. When tapping dry ice with a hammer, first cover it with a towel to keep the pieces in one place.
Never put dry ice in your mouth.
Never store dry ice in an airtight container. As the dry ice sublimates, gas pressure will build and the container will explode. Make sure your container is ventilated or has a loose-fitting lid.
Do not store dry ice in your freezer. It will cause your freezer to become too cold and the freezer may shut off. On the other hand, if you lose power for an extended period, dry ice is a good way to keep things cold if you can get it.
In the unlikely event of a dry ice burn, treat it the same as you would a heat burn. See a doctor if the skin blisters or comes off. Apply antibiotic ointment to prevent infection and bandage mild burns.

6. Effects of CO2 on H2O: Soda Lab
In this lab you will be making a soda drink in order to discover the best ratio of CO2 to H2O. First, you must make a hypothesis and then test your hypothesis. This is the first part of the scientific method.
If your hypothesis is supported, you are done.
If your experiment fails to support your hypothesis, revise your hypothesis and test again. You get a maximum of three attempts or trials.
When you have completed this lab, you must write up a lab report, following the notes in your class book: The Big Fat Notebook.
Your lab write up will be turned in for grading.
It will be worth 3 grades.
See the rubric provided with the lab paperwork for grading guidelines.
Scientific concepts used in this lab: compounds & elements, states of matter, mass, volume, density, changes of state, mixtures and solutions, solubility, freezing point, sublimation

7. Soda Lab Available Materials: CO2 sample (size varies)
Instructions:
Wear Protective Gear
Lab glasses, coat, gloves
Be sure to record data throughout experiment
Acquire materials
Label tasting cup with your initials and per. #
Find volume of CO2 sample
V=M/D density of dry ice = 1.56 g/mL
Measure volume of soda flavoring
Measure volume of water
Combine water and flavoring; measure volume
Record observations
Combine CO2 and flavored water.
Allow CO2 to completely dissolve; measure volume
Taste mixture
Available Materials:
CO2 sample (size varies)
Sample container (ramekin)
Chunk on dry ice
Distilled Water (amount varies)
Tasting cup (8oz. Plastic cup labeled w/ initials & per.#)
Water flavoring
Sharpie pen
Graduated cylinder (25 mL)
Plastic beaker (100 mL)
Digital scale
Calculator
Graph paper

8. Quick review of Types of Data
Recording Data
Use tables or charts
Displaying Data
Line: compares relationships between variables
Bar: compares different ideas side by side
Pie: compares parts of a whole
This Photo by Unknown Author is licensed under CC BY-NC-ND

9. Use CER method in conclusion
Make a CLAIM, back it up with EVIDENCE, and explain your REASONING
Claim:
the idea that you are trying to prove.
Evidence:
You should describe graphs and outline evidence. Strictly factual information. It should include:
Studies that support your claim
Data
Analysis outcomes
Facts
Reasoning:
This explains why evidence came out the in the way that it did. Reasoning should include:
Your ideas on why graphs have a particular shape.
Your ideas on why your claim is true.
You should reach logical conclusions based on evidence.
Build your argument to prove your point.

10. Practice CER (you do)
Working with a partner, complete the worksheet. Be sure to collaborate, critique, and discuss answers before writing them down.

11. Extend Go to IXL and work on Engineering practices
T.1Identify parts of the engineering-design process
T.2Explore the engineering-design process: going to the Moon!