What is Hazardous at Home?What is Hazardous at Home?

►This is due on Monday.This is due on Monday.►Get permission from you parents and Get permission from you parents and

have them sign the safety contract have them sign the safety contract before you begin looking for hazardous before you begin looking for hazardous materials.materials.

►You can use the internet if you think You can use the internet if you think you need additional information.you need additional information.

►Don’t forget to do the 3 analysis Don’t forget to do the 3 analysis questions on separate paper. Staple questions on separate paper. Staple them to the back of the worksheet.them to the back of the worksheet.

Activity 2Activity 2

Follow-up Follow-up

Analysis QuestionsAnalysis Questions2.2. Explain in Explain in detaildetail the safety guidelines the safety guidelines

you would follow when working with you would follow when working with potassium hydroxide.potassium hydroxide.

When working with potassium hydroxide, When working with potassium hydroxide, which is corrosive, I would wear gloves which is corrosive, I would wear gloves and goggles to avoid contact with my skin and goggles to avoid contact with my skin and eyes. Since it is also toxic, I would not and eyes. Since it is also toxic, I would not eat or drink in the lab to avoid ingesting eat or drink in the lab to avoid ingesting or inhaling it. I would also not want to or inhaling it. I would also not want to expose anyone else to the substance, so I expose anyone else to the substance, so I would be sure to keep it in a tightly would be sure to keep it in a tightly closed, labeled bottle and store it in a closed, labeled bottle and store it in a locked cabinet.locked cabinet.

Evidence

3.3. Of the substances listed on Student Of the substances listed on Student Sheet 2.1, which do you think poses Sheet 2.1, which do you think poses the greatest hazard to the health of the greatest hazard to the health of humans and animals? humans and animals? Explain.Explain.

► answer should be one of the answer should be one of the substances included in more than substances included in more than one hazard class (hydrogen peroxide, one hazard class (hydrogen peroxide, ammonium hydroxide, potassium ammonium hydroxide, potassium hydroxide, hydrochloric acid, copper hydroxide, hydrochloric acid, copper chloride, or ethyl alcohol).chloride, or ethyl alcohol).

► a complete and correct answer will a complete and correct answer will include justification to support your include justification to support your answer.answer.

4.4. If a shipment of sodium borate were If a shipment of sodium borate were sent to your classroom, which hazard sent to your classroom, which hazard label(s) do you think would be on the label(s) do you think would be on the box?box?

If a shipment of sodium borate were If a shipment of sodium borate were sent to my classroom, it would have a sent to my classroom, it would have a _________ label on it because………_________ label on it because………

Notecard QuizNotecard Quiz

Name ___________ Date _______ Period __Name ___________ Date _______ Period __

Activity 2, #2Activity 2, #2

Copy exactly what you have written in Copy exactly what you have written in your notebook. Writing anything other your notebook. Writing anything other than what is already written in your than what is already written in your notebook will result in a score of zero.notebook will result in a score of zero.

Activity 3Activity 3

TitleTitle: :

A Plan to Separate the MixtureA Plan to Separate the Mixture

VocabularyVocabulary

►MixtureMixture►ObservationObservation►InferenceInference

Background InformationBackground Information►Matter is either a pure substance (elements Matter is either a pure substance (elements

or compounds) or a mixtureor compounds) or a mixture►What is an example of a mixture?What is an example of a mixture?► A mixture consists of 2 or more substances A mixture consists of 2 or more substances

that are not combined chemicallythat are not combined chemically►Mixture are usually easy to separateMixture are usually easy to separate► Common mixtures includeCommon mixtures include

AirAir ConcreteConcrete SoilSoil SodaSoda juicejuice

►Mixtures can be separated by physical Mixtures can be separated by physical means, such asmeans, such as FiltrationFiltration DistillationDistillation Allowing components to settleAllowing components to settle Manually separating usingManually separating using

►ForcepsForceps►MagnetsMagnets►SievesSieves►FiltersFilters►Phase changes (evaporating or freezing)Phase changes (evaporating or freezing)

How could you separate the How could you separate the components of:components of:

►Vegetable SoupVegetable Soup Strain the solutionStrain the solution

►Oil and VinegarOil and Vinegar Use a pipette (dropper) to remove the top oilUse a pipette (dropper) to remove the top oil Pour the oil offPour the oil off

►Wet SandWet Sand Evaporate water offEvaporate water off Filter paperFilter paper

►SaltwaterSaltwater Evaporate or boil water offEvaporate or boil water off

Heterogeneous vs. Heterogeneous vs. HomogeneousHomogeneous

►HeterogeneousHeterogeneous Components can be distinguished visuallyComponents can be distinguished visually

►Vegetable soupVegetable soup►A jar of nuts, bolts, and screwsA jar of nuts, bolts, and screws

►Homogeneous (also known as a Homogeneous (also known as a solution)solution) Components cannot be distinguished Components cannot be distinguished

visuallyvisually►MilkMilk►SaltwaterSaltwater►Brass (alloy of copper and zinc)Brass (alloy of copper and zinc)►Orange juiceOrange juice

Making ObservationsMaking Observations

►Make observations detailedMake observations detailed

►Example observation:Example observation: ““It is a liquid”It is a liquid” How could this observation be improved?How could this observation be improved?

►Include texture, color and other specificsInclude texture, color and other specifics

Observation or InferenceObservation or Inference►““There is a clear, colorless liquid at the There is a clear, colorless liquid at the

top of the cup.” (observation)top of the cup.” (observation) Observation- notes taken that provide Observation- notes taken that provide

evidence using 5 senses evidence using 5 senses

►““There is a layer of water at the top of There is a layer of water at the top of the cup.” (inference)the cup.” (inference) Inference- a conclusion based on Inference- a conclusion based on

observations or what is already known observations or what is already known

Read pg. A-10Read pg. A-10

Problem:Problem: How can you separate How can you separate the substances in a mixture?the substances in a mixture?

Hypothesis/Initial Thoughts:Hypothesis/Initial Thoughts:

Observation:Observation:In this space, explain in detail what In this space, explain in detail what

you observe in the sample mixture.you observe in the sample mixture.

Materials:Materials:List the materials (using bullets) you List the materials (using bullets) you

would use to separate the mixture would use to separate the mixture into its individual components.into its individual components.

Procedure:Procedure:Come up with a plan to separate the Come up with a plan to separate the

mixture. A good plan will detail how mixture. A good plan will detail how you will attempt to separate solids from you will attempt to separate solids from liquids, separate the liquids, and liquids, separate the liquids, and separate and clean the solids.separate and clean the solids.

Separating Solids and LiquidsSeparating Solids and Liquids Separating Different LiquidsSeparating Different Liquids Separating and Cleaning Different Separating and Cleaning Different

SolidsSolids Clean upClean up

Analysis:Analysis:Do analysis questions 1, 3, and 5. Do analysis questions 1, 3, and 5.

Make sure answers are complete Make sure answers are complete and detailed using information you and detailed using information you may have learned from this may have learned from this activity and from previous activity and from previous activities.activities.