Laboratory Procedures and Safety

Tamarah has just finished using the microscope. What is the safest way for her to turn off the microscope?

• Unplug the microscope by pulling it away from the wall, then switch it off.

• Switch off the microscope, then unplug it from the wall.

• Switch off the microscope, then unplug the microscope by pulling away from the wall.

• Unplug the microscope from the wall, then switch it off.

Heather is using a lamp during her lab. She notices that the lamp’s cord is damaged. What should Heather do?

• Turn the lamp on to test it.

• Wrap a piece of tape around the cord.

• Use the lamp. It is still safe.

• Take the damaged lamp to her teacher.

Which items used by a science class could be reused or recycled instead of thrown away in the trash?

• empty soda cans

• foam cups

• plastic cups

• all of these

Tags

NGSS.MS-ESS3-3

Which of the followings methods is a safe way to practice conservation in a science lab?

• Do not wash lab glassware after it is used in an investigation.

• Limit the amount of materials used during an investigation.

• Throw away all disposable materials after they’ve been used.

• Avoid using protective gloves if they are not made of recyclable materials.

Tags

NGSS.MS-ESS3-3

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

What safety rule should you follow when performing an experiment that involves electricity?

• Wear metal jewelry to avoid getting shocked.

• Only use 9-volt batteries; all other batteries are unsafe.

• Wear sunglasses to avoid hurting your eyes.

• Always perform the experiment under adult supervision.

A science class is doing a laboratory experiment with liquids.

What safety equipment will keep their hands safe from spills?

• goggles

• an apron

• gloves

• all of these

When dealing with unknown chemicals, why is it important to read the label on the container?

• The label will tell you the possible dangers of using the chemical and the safety rules you should follow when handling the chemical.

• The label will tell you the nutritional value in one serving of the chemical.

• The label will tell you how to perform experiments that are not in your lab manual.

• The label will tell you how the chemical tastes so that you can try some during the lab.

Why is it important to wear safety goggles when pouring an unknown liquid?

• Safety goggles make you look like you're a real scientist.

• Safety goggles protect your body from getting burned during an experiment.

• Safety goggles make it easier to see what you are doing, which helps to avoid making mistakes during the experiment.

• Safety goggles protect your eyes from liquids that could splash up and cause serious damage.

Once a laboratory experiment has been finished, it is important to

• taste the product of the laboratory experiment.

• leave the lab area immediately without cleaning.

• play around with the laboratory equipment.

• clean up the lab area and wash your hands.

Mr. Wesley has had to remind his class many times to wear their goggles and to follow the safety rules. What could the class do to help themselves to remember to be safe in science class?

• always have science class right after lunch

• wear their goggles all day long

• make safety posters to hang in the classroom

• wait until someone gets hurt