TEKS: 5.1 (A): Lab Safety - Test 2

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TEKS: 5.1 (A): Lab Safety - Test 2 - Quiz

5. (1) Scientific processes. The student conducts field and laboratory investigations following home and school safety procedures and environmentally appropriate and ethical practices. The student is expected to: (A) demonstrate safe practices during field and laboratory investigations; and


Questions and Answers
  • 1. 

    When entering the science lab a student sees the science equipment on the table. The student should -

    • A.

      Turn on the bunsen burner

    • B.

      Mix the chemical that are on the table

    • C.

      Begin cleaning the table

    • D.

      Wait for the teacher to give instructions

    Correct Answer
    D. Wait for the teacher to give instructions
  • 2. 

    A student breaks a glass beaker while working on an investigation. The student should now -

    • A.

      Ask his partner for help cleaning the beaker

    • B.

      Clean the glass up himself

    • C.

      Leave the glass on the table and floor and continue working

    • D.

      Inform the teacher about the broken beaker

    Correct Answer
    D. Inform the teacher about the broken beaker
    Explanation
    The correct answer is to inform the teacher about the broken beaker. This is the most responsible and appropriate action to take in this situation. The teacher needs to be notified so that they can ensure the broken glass is cleaned up properly and that no one gets injured. Additionally, the teacher may need to provide a replacement beaker for the student to continue their investigation.

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  • 3. 

    Latex gloves should be worn in all of the following situations except -

    • A.

      Working with dangerous chemicals

    • B.

      When working with high temperatures

    • C.

      When working with cold temperatures

    • D.

      When dissolving water and sugar

    Correct Answer
    D. When dissolving water and sugar
    Explanation
    Latex gloves should be worn in all situations mentioned except when dissolving water and sugar. This is because water and sugar are not dangerous chemicals, nor do they involve high or cold temperatures that could harm the hands. Therefore, wearing latex gloves is unnecessary in this specific situation.

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  • 4. 

    When using a microscope one should be careful not to -

    • A.

      Point the mirror directly to the sun

    • B.

      Look at tiny organisms

    • C.

      Allow your partner to look through it as well

    • D.

      Clip the slides correctly

    Correct Answer
    A. Point the mirror directly to the sun
    Explanation
    When using a microscope, it is important not to point the mirror directly to the sun. This is because the intense light from the sun can damage the microscope and potentially harm the user's eyes. The mirror in a microscope is used to reflect light onto the specimen, but directing sunlight through the microscope can cause excessive heat and potentially lead to a fire. Therefore, it is crucial to avoid pointing the mirror directly at the sun while using a microscope.

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  • 5. 

    Running around the classroom could cause all of the following except -

    • A.

      Students to get hurt

    • B.

      Students to finish their work faster

    • C.

      Students to break glass containers

    • D.

      Students to cause an accident

    Correct Answer
    B. Students to finish their work faster
    Explanation
    Running around the classroom is unlikely to cause students to finish their work faster. This is because running around can be distracting and may lead to a lack of focus and productivity. Instead, it is more likely to cause accidents, potential injuries, and damage to glass containers.

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  • 6. 

    Tongs should be used in the lab when -

    • A.

      Working with water

    • B.

      Working with sand

    • C.

      Working with hot objects

    • D.

      Working with a microscope

    Correct Answer
    C. Working with hot objects
    Explanation
    Tongs should be used in the lab when working with hot objects because they provide a safe way to handle materials that are too hot to touch with bare hands. Tongs have insulated handles that protect the user from burns and allow them to grip and manipulate hot objects without direct contact. This helps to prevent accidents and injuries in the lab and ensures the safety of the experimenter.

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  • 7. 

    Aaaa

    • A.

      A

    • B.

      A

    • C.

      A

    • D.

      A

    Correct Answer
    A. A
  • 8. 

    Sasaa

    • A.

      A

    • B.

      A

    • C.

      A

    • D.

      A

    Correct Answer
    A. A
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