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Types of Hazards

Key Words: Corrosive, Flammable

A substance is corrosive if it reacts with a solid material. Watch the LABsent video (found here: https://vimeo.com/152313629) to see a demonstration of corrosive.

Getting Started: 1. What do you observe in each jar of the showing the corrosive demonstration?

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2. What safety precautions should you follow if working with a corrosive liquid?

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3. Read the introduction and Challenge in your Student Book for Activity 2, “Types of Hazards” on page A-6.

Procedure:

1. Look at the table on page A-7 of your Student Book that shows the labels that the D.O.T. requires on hazardous materials. You may have seen some of these labels on large trucks or on storage containers. Think about what each label reveals about the material.

2. Look at the 12 Chemical Data cards on the next page. Read the cards. Consider places where you might have encountered the substance on each card.

3. Familiarize yourself with each of the substances the cards describe. Fill out Student Sheet 2.1, “Classroom Substances,” attached to this packet. For each substance, list: The hazard class(es) it belongs to. (use data table in physical science text book pg A8) The safety precautions people should take when using this substance.

4. When you have finished all of the cards, sort the 12 substances according to the hazard class(es) you assigned to each in Step 3.

IAPS Studying Materials Scientifically: Activity 2 LAB-AIDS Inc. Absent Work

Name _____________________________________________ Date_______________

5. Record the results of your sorting on Student Sheet 2.2, “Venn Diagram of Classroom Results,” attached to this packet.

Follow-Up:1. Use and complete Student Sheets 2.3 and 2.4, which are attached to this packet, to discover any materials you may have in your home that might be hazardous.

Analysis Questions:1. Which substances from Student Sheet 2.1, “Classroom Substances,” fall into more than one hazard

class?

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2. Explain in detail the safety guidelines you would follow when working with potassium hydroxide.

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

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

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IAPS Studying Materials Scientifically: Activity 2 LAB-AIDS Inc. Absent Work

Name _____________________________________________ Date_______________

IAPS Studying Materials Scientifically: Activity 2 LAB-AIDS Inc. Absent Work

Name _____________________________________________ Date_______________

IAPS Studying Materials Scientifically: Activity 2 LAB-AIDS Inc. Absent Work

Name _____________________________________________ Date_______________

IAPS Studying Materials Scientifically: Activity 2 LAB-AIDS Inc. Absent Work

Name _____________________________________________ Date_______________

Classroom Substances

Substance Hazard Class(es) Safety Precautions

Ammonium Hydroxide

Carbon Dioxide

Copper Chloride Solution

Ethyl Alcohol (Ethanol)

Hydrochloric Acid Solution

Hydrogen Peroxide

Magnesium

Neroline Yara Yara

Phenolphthalein Solution

Polyvinyl Alcohol

Potassium Hydroxide

Sodium Borate

Issues and Physical Science – Student Sheet 2.1

IAPS Studying Materials Scientifically: Activity 2 LAB-AIDS Inc. Absent Work

Name _____________________________________________ Date_______________

Venn Diagram of Classroom Substances

Issues and Physical Science – Student Sheet 2.2

IAPS Studying Materials Scientifically: Activity 2 LAB-AIDS Inc. Absent Work

Name _____________________________________________ Date_______________

IAPS Studying Materials Scientifically: Activity 2 LAB-AIDS Inc. Absent Work