Science Trimester I Exam

If you are unclear about a specific step in the lab, what should you do?

• Stop immediately, and seek the teacher's help.

• Do your best and try to make it work.

• Ask the group closest to you for assistance.

• Skip the step and go to the next step.

What is the first thing you should do if a student's baggy shirt catches on fire while performing a lab with an open flame?

• Calmly get the fire blanket and wrap the student tightly and quickly.

• Get the fire extinguisher and aim the nozzle directly toward the flame.

• Yell for help, and hope that someone will know what to do next.

• None of the above.

What is the purpose of the safety shower?

• Washing off paint, diluting various containers of different solutions.

• Objects on the body, objects in the eye.

• Acids on the body, objects or chemicals in the eye.

• None of the above.

When are safety goggles required in the lab?

• Working with heat or chemicals.

• Anytime the teacher tells you.

• Working with sharp objects.

• All of the above.

What should you do while heating a test tube?

• Have your lab partner close to the test tube to observe what changes are taking place.

• Hold the test tube with tongs while looking down into the tube.

• Hold the test tube with tongs pointing toward the ceiling.

• Hold the test tube at a slant, pointing it away from you and others.

What should you always do when working with any form of heat or flame?

• Leave the source on when you are finished working.

• Leave the heat source unattended.

• Be responsible for the source 100% of the time.

• Experiment with different chemicals and substances to check their flammability.

How should you smell an unknown substance in a beaker during a lab?

• Place the beaker about 8 inches from your nose and waft or wave your hand smelling the moving air.

• Hold the beaker at an angle and have your lab partner smell the unknown substance.

• Place the beaker under your nose and smell the unknown substance.

• Be careful not to directly sniff the substance, but place the beaker just close enough to smell.

What should you do at the conclusion of the lab?

• Ensure that all lab equipment is cleaned and returned to the assigned area.

• Wash your hands before you leave class.

• Both A and B are correct.

• Neither A and B are correct.

Which of the following is not recommended when working with any electrical device?

• Check the cord and make certain the area is dry.

• Working with equipment with a damaged cord.

• Follow the directions as explained in the lab.

• Use the device only as instructed.

Which letter would be the most suitable to compare the image of a letter seen through a compound light microscope with the actual orientation of the letter on the slide?

(Hint: Think of our "E" newspaper lab!)

• F

• I

• O

• Z