Question

1. i will perform only those activities that have been authorized by the instructor.

a) false
b) true

1. horseplay and running in the lab is not allowed.

a) true
b) false

1. it is always okay to wear open - toed or open heel shoes in the laboratory

a) false
b) true

1. in the laboratory, the following should not be worn:

a) loose clothing
b) dangling jewelry
c) all of the above
d) opened toe or heel shoe

1. this lab tool is used to make objects not visible to the naked eyes seen.

a) telescope
b) eye glasses
c) microscope

1. this tool is used to measure length.

a) compass
b) ruler
c) globe

1. this tool is used to measure temperature.

a) scale
b) tuning fork
c) thermometer

1. what is this tool?

a) triple beam balance
b) electronic balance
c) overflow can

1. identify the following lab equipment

a) pipe stem triangle
b) separator
c) funnel

1. jill is getting ready to do a science experiment with some other students. jill wants to be safe during the experiment. which of these should jill not do?

a) tie her loose hair back
b) take off her long necklace
c) get a snack ready to eat during the experiment

Explanation:

1. Lab safety rules require only instructor-authorized activities.
2. Horseplay/running in labs is prohibited for safety.
3. Open-toed/heel shoes are unsafe in labs.
4. Loose clothing, dangling jewelry, and open shoes all pose lab hazards.
5. Microscopes magnify tiny, naked-eye-invisible objects.
6. Rulers are standard length-measuring tools.
7. Thermometers are designed to measure temperature.
8. The image shows a triple beam balance, a mechanical weighing tool.
9. The square-shaped lab tool is a pipe stem triangle, used to hold crucibles.
10. Eating during experiments risks contamination and is unsafe.

Answer:

1. b) True
2. a) True
3. a) False
4. c) All of the above
5. c) Microscope
6. b) Ruler
7. c) Thermometer
8. a) Triple beam balance
9. a) Pipe stem triangle
10. c) get a snack ready to eat during the experiment