Family and Consumer Sciences
Home Chemist
Gwinnett County Public Schools
Family and Consumer Sciences
Middle School
2007
Family and Consumer Sciences
Home Chemist
Student Manual
Gwinnett County Public Schools
Family and Consumer Sciences
Middle School
2007
Be sure to check each module for additional handouts that are not on the CD.
Secret Code Hand Washing Game
A New Substance
Germs Wars
Answer Sheets
Home Chemist
INTRODUCTION this module will cover chemistry in the home related to cleaning.
The home is an environment which can be neat and clean
Or messy and dirty depending on how it is maintained. The
Kitchen and bathroom, especially, can be breeding grounds for bacteria which can cause illness. This module will deal with cleaning supplies; how and why they work.
OBJECTIVE 1. Define terms related to bacteria and cleaning supplies
2. List types of chemical cleaning agents and their purposes
3. Demonstrate the proper way to disinfect a counter
surface and a cutting board
4. Explain why cleanliness is important
5. Describe surface bacterial contamination and how to disinfect
6. Conclude why cleaning is important in our daily lives
7. Conclude how “gas” is formed from two compounds
AKS #10, 17, 20, 40, 41
ESSENTIAL 1. Explain why dovetailing is important in household chores.
QUESTIONS 2. Explain why it is important to sanitize your kitchen surface.
3. Why is it important that your don’t mix cleaning agents?
4. Describe the best method of getting all the household chores done.
MATERIALS Glogerm spray (Mix: 4 parts hand lotion and 1 part
clear fluorescent paint; put in spray bottle)
Antibacterial dishwashing/hand liquid
Chlorine bleach
Cleaning supplies: cloths, bucket, vinyl gloves
Activity Sheets
Text Books: Applying Life Skills
EQUIPMENT Blacklight
Home Chemist
Activity One
1. Locate the pretest and complete it according to the instructions before you go to the next step.
2. Review the following vocabulary words before you begin the module. When you find the words in the reading material or videos as you come to them during the next four days, define them on your own paper.
Sanitize
Bacterial Contamination
Detergent
Maintenance
Chlorine
Antibacterial
Transmitted
3. Locate the Textbook Applying Life Skills.
4. Read pages 636-641.
5. On notebook paper, copy each question below and answer them with complete sentences.
A. Name 3 ways you can clean home maintenance.
B. Give 3 examples of a daily task and weekly task.
C. What should you wear when you use pest control products?
6. Get the worksheet “Keeping Up With Cleanup”. On a piece of notebook paper, answer the questions.
7. Get the worksheet “Home Maintenance Plan”. On a piece of notebook paper, make a chart and fill it out using the information from the worksheet.
8. Clean up your module area and make sure everything is returned to its proper location.
Home Chemist
Pretest
Directions: Answer the following questions on your pretest/posttest answer sheet. Bubble in the best answer.
1. What can result if two cleaning agents (chemicals) are mixed together?
A. nothing
B. it will clean better
C. it could make a deadly gas
D. it will kill germs better
2. Why is it important to have a sanitary environment?
A. there is no good reason
B. so germs don’t make us sick
C. bacteria can cause cancer
D. so we can be organized
3. What is most effective in removing stains from carpet or clothing?
A. soap and water
B. detergent and hot water
C. commercial stain remover
D. soft scrub nonabrasive cleanser
4. Why is cleaning important?
A. it makes you feel good
B. it removes dirt
C. it removes bacteria
D. both b & c
5. What does chemistry have to do with detergents?
A. detergents are made up of chemicals
B. has nothing to do with it
C. detergents are always antibacterial
D. stains are always removed with detergents
Home Chemist - Pretest
6. How can harmful bacteria be transmitted to humans?
A. cutting boards which are insanities
B. by touching objects which are contaminated
C. by not washing hands
D. all of the above
7. Which is NOT a sanitary practice?
A. emptying the trash
B. emptying the trash, then making dinner
C. emptying the trash, then washing hands with hot soapy water
D. using trash bags
8. How can bacteria make people sick?
A. it contains a virus
B. it mutates the cells
C. it multiplies and gets into the body
D. it is all around us
9. Because it kills germs, what is the best cleaning agent to remove bacteria from bathroom surfaces and fixtures?
A. chlorine bleach
B. detergent mixed with a small amount of water to make a paste
C. commercial stain removers
D. mouthwash
10. Due to the irritating nature of some cleaning agents to the skin, what would be best to use to protect your hands?
A. soap & water, then lotion after washing
B. special hand soap
C. plastic gloves
D. a surgical mask
Home Chemist
Activity Two
1. Locate and read the information sheet titled “Counter Contamination!”
2. Turn to locate the Glow germ spray instruction sheet and backlight in Kitchen #3.
3. In Kitchen #3, follow the instructions for applying the powder and washing it off.
4. Locate “Activity Two Question Sheet” and answer the questions on your own paper.
Title this sheet “Antibacterial Experiment.”
5. Write a paragraph on the same sheet of paper (not less than five complete sentences) titled, “It is important to sanitize our kitchen surfaces because...”
6. Locate the worksheet, “Secret Code Hand Washing Game” and complete as directed.
7. Clean up your module area and make sure that everything is returned to its proper location.
Home Chemist
“Glogerm Spray Instruction Sheet”
1. Go to Kitchen #3 and locate the Glogerm powder. (Get from Mrs. Baggett)
2. Get sponge, cleaning agent (antibacterial dishwashing detergent), cleaning cloths & bucket.
3. Sprinkle the “germs” on the countertop and cutting board.
4. Wash the countertop and cutting board using the cleaning agent.
5. Rinse with clear water. (Do not immerse a wooden cutting board into water! It will warp the wood).
6. Wipe dry with a cloth.
7. Light the backlight and check your cleaning results.
8. Read the label of the antibacterial dishwashing bottle. What is the name of the active ingredient?
Home Chemist
“Counter Contamination”
Bacteria are invisible to the naked eye but are everywhere! When left to grow unchecked, they can be transmitted (transferred) to humans through contact with contaminated surfaces or not washing hands after using the restroom.
Countertop and cutting board contamination, (as well as bathroom surfaces), is when bacteria have multiplied to a high enough level to cause illness. This is caused from not properly eliminating bacteria from surfaces, and from uncooked meat & poultry contacting the surfaces.
There are several cleaning agents on the market which do various specific or general cleaning. READ THE LABEL on the back, and follow the instructions for that specific product.
Cleaning surfaces with water, hot or cold is useless. You must use soap or detergent, preferably antibacterial, with hot water, and scrub vigorously “to suspend the microorganisms”.
An inexpensive cleaning agent is chlorine bleach. Cleaning with 1 tablespoon chlorine bleach per sink or bucket of hot water will sanitize most surfaces. To sanitize means to kill most of the harmful bacteria. (Always use vinyl gloves to protect hands from the irritation of corrosive chemicals)
Rinse several times with clear cold water.
Dry the surfaces thoroughly.
Home Chemist
Activity Two Question Sheet
(Answer on Your Own Paper)
“Antibacterial Experiment”
1. What was sprinkled on the counter and cutting board?
2. What cleaning agent did you use to clean? (Not the brand name, but the name of the active ingredient found on the back label).
3. Why do you think people might not clean thoroughly enough? List three reasons.
4. What were your observable cleaning experiment results before using the backlight?
5. What were your observable cleaning experiment results after using the backlight?
6. List your conclusions from this experiment.
Home Chemist
Activity Three
1. Locate and read the instruction sheet “A New Substance”.
2. Assemble your equipment & supplies.
3. Predict (using the back of the same sheet), what you think will happen.
4. Follow the procedure.
5. Record the results by drawing pictures and descriptive writing.
6. On the same sheet, under Think & Write, how does this relate to cleaning agents?
7. Locate the worksheet, “Clean and Safe at Home” and complete as directed.
8. Clean up your module area and make sure that everything is returned to its proper location.
Enrichment: (Chemistry) Research and record the chemical symbol for the gas carbon dioxide.
Home Chemist
Activity Four
1. Locate and play the boardgame Germ Wars. On a sheet of notebook paper, write 10 facts from the boardgame.
Enrichment: Read the article Pestproof Your Home. Make a list of ways that you can pestproof you home.
2. Locate the posttest and complete it according to the directions.
3. Get out a piece of notebook paper and place your name, class and folder # in the upper right hand corner. Place your module name on the top line. Copy the following list, and then gather the assignments in order. Place the list on top and staple the stack together. Paperclip your pre/post test answer sheet on top
Vocabulary Words
Activity One Questions
Keeping Up with Cleanup
Home Maintenance Plan
Activity Two Questions
Paragraph
Secret Code Hand washing Game
Activity Three Worksheet “A New Substance”
Clean and Safe at Home word search
Germ Wars facts
Pestproof Your Home
Extra credit
4. Cleanup your module area and make sure that everything is returned to its proper location.
5. If time, do this for Extra Credit: Read the article called, “You May Not Be as Clean As You Think You Are”. Write a summary and title it Extra Credit.
Home Chemist
Posttest
Instructions: Answer the following questions on your pretest/post test answer sheet. Bubble in the best answer.
1. Select the word(s) which means to kills germs.
A. detergent
B. antibacterial
C. bacteria’s merit
D. phosphoric acid
2. What can happen if two cleaning agents are mixed together?
A. A deadly gas can be formed
B. carbon dioxide will be formed
C. it will clean better
D. nothing
3. Why is it important to sanitize surfaces?
A. it is not that important
B. if you can’t see it, it can’t hurt you
C. humans can get sick by transmission
D. sanitizing is only needed in hospitals
4. How is chemistry related to home cleaning and safety?
A. the home has chemicals in it
B. cleaning agents are made up of chemicals
C. chemical compounds can explode if mixed together
D. both b & c
5. What should you do to protect your hands from corrosive chemicals?
A. put a lot of hand lotion on after cleaning
B. use only warm water and no detergent
C. don’t use chemicals
D. wears vinyl gloves
Home Chemist - Posttest
6. If a surface is “contaminated” with bacteria; that means...
A. it needs cleaning
B. it can make people sick
C. use an antibacterial cleaner to kill most bacteria
D. all of the above
7. Chlorine is a cleaning agent which is useful in:
A. killing bacteria on surfaces
B. washing dishes
B. getting stains out of carpets
C. hand washing liquids
8. A detergent is:
A. an antibacterial agent
B. a cleaning agent
C. only used to wash clothes
D. a gas
9. Transmitted means:
A. to go across
B. to go into
C. to pass by
D. to transfer
10. How is bacteria transmitted to humans?
A. through the skin
B. by putting unwashed hands in the mouth or eyes
C. by touching anything contaminated and then handling food
D. both b & c
Home Chemist
Answers to Pre and Post tests
Pre-Test
1. C
2. B
3. C
4. D
5. A
6. D
7. B
8. C
9. A
10. C
Post-Test
1. B
2. A
3. C
4. D
5. D
6. D
7. A
8. B
9. D
10. D
Modules/Home Chemist Revised July, 2007 11