Question

safety in your science classroom
safety symbols
the following safety symbols are used in the mc science communications 3 to 5. be sure that you understand each symbol and its meaning and the precautions before you begin.

safety symbols
list with textbook page no.
for each description of a procedure in an investigation, identify at least two safety symbols you would expect to see as a reminder of some safety precautions that should be taken.

1. description of procedure: use a razor blade to cut open a can

safety symbols: blank
reason why these safety symbols are used: blank

1. description of procedure: mix hydrochloric acid with some sodium hydroxide in a test tube

safety symbols: blank
reason why these safety symbols are used: blank

1. description of procedure: heat a test tube containing solutions of chemicals over a bunsen burner for 5 minutes

safety symbols: blank
reason why these safety symbols are used: blank

1. description of procedure: add hydrochloric acid to a piece of magnesium ribbon in a test tube

safety symbols: blank
reason why these safety symbols are used: blank

1. description of procedure: prepare a wet mount slide. then use a light microscope to view that slide on the stage.

safety symbols: blank
reason why these safety symbols are used: blank

Explanation:

To solve this, we analyze each procedure:

Procedure 1: “Pour liquids at procedure”

• Safety Symbol: Glassware Safety (since pouring liquids involves using glassware, and this symbol reminds to be careful with glassware to avoid cuts or breakage).
• Reason: Pouring liquids with glassware (like beakers, flasks) can lead to breakage if not careful, causing cuts. The Glassware Safety symbol alerts to handle glassware properly.

Procedure 2: “Use independence, act with some teacher supervision at a test lab”

• Safety Symbol: General Safety (or a “supervision - required” symbol, but from the given symbols, Electrical Safety might not fit. Alternatively, General Safety as it’s about lab conduct with supervision). Wait, re - evaluate: If it’s a lab with electrical equipment, Electrical Safety could be, but the key is “act with teacher supervision” – maybe General Safety to remind of following lab rules under supervision.
• Reason: In a test lab, even with independence, teacher supervision is key. General safety rules (like no horseplay, following instructions) ensure safety, so the symbol reminds of adhering to lab safety protocols.

Procedure 3: “Heat a test tube containing solutions, sometimes over a Bunsen burner for 5 minutes”

• Safety Symbol: Fire Safety (since Bunsen burners involve fire, and Heating Safety (if exists) – but from the given symbols, Fire Safety or Heating Safety (but the provided symbols include Fire Safety: “This symbol indicates as a reminder to be careful around open flames”).
• Reason: Heating with a Bunsen burner involves open flames, so Fire Safety symbol reminds to be cautious (e.g., tie back hair, no flammable materials nearby) to prevent fires or burns.

Procedure 4: “Add Hydrochloric acid to a piece of magnesium ribbon at a test tube”

• Safety Symbol: Chemical Safety (this symbol is for when chemicals or chemical reactions could cause burns or fumes. HCl is corrosive, Mg + HCl reaction produces fumes).
• Reason: Hydrochloric acid is corrosive (can burn skin/eyes), and the reaction produces hydrogen gas (flammable) and fumes. Chemical Safety symbol alerts to wear goggles, gloves, and work in a ventilated area.

Procedure 5: “Prepare a wet mount slide. Then, use a light microscope to view that cells in the slide”

• Safety Symbol: Eye Safety (using a microscope involves looking through eyepieces, and Glassware Safety (slides are glass). But Eye Safety (reminder to protect eyes, e.g., from accidental spills near eyes or proper use of microscope eyepieces).
• Reason: When preparing slides or using a microscope, there’s a risk of liquid spills near eyes (e.g., from wet mounts) or eye strain. Eye Safety symbol reminds to wear goggles and use proper eye protection.

Final Answers (for each procedure, pick two as an example, say Procedure 1 and 4):

Procedure 1:

• Safety Symbol: Glassware Safety
• Reason: Pouring liquids uses glassware; the symbol reminds to handle glassware carefully to avoid breakage/cuts.

Procedure 4:

• Safety Symbol: Chemical Safety
• Reason: HCl is corrosive, and the Mg - HCl reaction has hazards (burns, fumes); the symbol alerts to chemical safety protocols.

(Note: Adjust based on the exact safety symbols provided in the textbook’s “Safety Symbols” section – the above uses the descriptions from the image’s visible text about each symbol.)

Answer:

To solve this, we analyze each procedure:

Procedure 1: “Pour liquids at procedure”

• Safety Symbol: Glassware Safety (since pouring liquids involves using glassware, and this symbol reminds to be careful with glassware to avoid cuts or breakage).
• Reason: Pouring liquids with glassware (like beakers, flasks) can lead to breakage if not careful, causing cuts. The Glassware Safety symbol alerts to handle glassware properly.

Procedure 2: “Use independence, act with some teacher supervision at a test lab”

• Safety Symbol: General Safety (or a “supervision - required” symbol, but from the given symbols, Electrical Safety might not fit. Alternatively, General Safety as it’s about lab conduct with supervision). Wait, re - evaluate: If it’s a lab with electrical equipment, Electrical Safety could be, but the key is “act with teacher supervision” – maybe General Safety to remind of following lab rules under supervision.
• Reason: In a test lab, even with independence, teacher supervision is key. General safety rules (like no horseplay, following instructions) ensure safety, so the symbol reminds of adhering to lab safety protocols.

Procedure 3: “Heat a test tube containing solutions, sometimes over a Bunsen burner for 5 minutes”

• Safety Symbol: Fire Safety (since Bunsen burners involve fire, and Heating Safety (if exists) – but from the given symbols, Fire Safety or Heating Safety (but the provided symbols include Fire Safety: “This symbol indicates as a reminder to be careful around open flames”).
• Reason: Heating with a Bunsen burner involves open flames, so Fire Safety symbol reminds to be cautious (e.g., tie back hair, no flammable materials nearby) to prevent fires or burns.

Procedure 4: “Add Hydrochloric acid to a piece of magnesium ribbon at a test tube”

• Safety Symbol: Chemical Safety (this symbol is for when chemicals or chemical reactions could cause burns or fumes. HCl is corrosive, Mg + HCl reaction produces fumes).
• Reason: Hydrochloric acid is corrosive (can burn skin/eyes), and the reaction produces hydrogen gas (flammable) and fumes. Chemical Safety symbol alerts to wear goggles, gloves, and work in a ventilated area.

Procedure 5: “Prepare a wet mount slide. Then, use a light microscope to view that cells in the slide”

• Safety Symbol: Eye Safety (using a microscope involves looking through eyepieces, and Glassware Safety (slides are glass). But Eye Safety (reminder to protect eyes, e.g., from accidental spills near eyes or proper use of microscope eyepieces).
• Reason: When preparing slides or using a microscope, there’s a risk of liquid spills near eyes (e.g., from wet mounts) or eye strain. Eye Safety symbol reminds to wear goggles and use proper eye protection.

Final Answers (for each procedure, pick two as an example, say Procedure 1 and 4):

Procedure 1:

• Safety Symbol: Glassware Safety
• Reason: Pouring liquids uses glassware; the symbol reminds to handle glassware carefully to avoid breakage/cuts.

Procedure 4:

• Safety Symbol: Chemical Safety
• Reason: HCl is corrosive, and the Mg - HCl reaction has hazards (burns, fumes); the symbol alerts to chemical safety protocols.

(Note: Adjust based on the exact safety symbols provided in the textbook’s “Safety Symbols” section – the above uses the descriptions from the image’s visible text about each symbol.)