Review for Mid Term Exam December 2024

Which of the following tools is necessary in a science lab for safety purposes?

• A triple-beam balance
• A metric ruler
• A computer
• A fire extinguisher

A fire blanket is used for:

• Smothering flames when someone’s clothing or hair catches fire
• Absorbing chemical spills
• Extinguishing large fires
• Protecting clothing and skin from chemical burns

Long hair in the lab must be......

• Cut shorter
• Held away from the experiment with your free hand.
• Tied back to be kept out of the way.
• Wet

All of the following statements concerning WHEN and HOW to use an eyewash are true EXCEPT:

• Flush the eyes with water for a minimum of 15 minutes.
• Keep the eyes closed while flushing with water.
• Know the location and how to use the eyewash before handling chemicals.
• After flushing with water, the school nurse should examine the eyes to determine if further treatment is needed.

This is called a...

• Digital scale
• Triple beam balance
• Microscope
• Spring scale

If a harmful chemical splashes in your eys or on your skin, you should _____.

• Ignore it and hope it goes away.
• Run to the bathroom.
• Wipe it off with a paper towel and finish the lab.
• Flush with water at the eyewash station and tell the teacher.

An instrument that uses a lens to make tiny things look larger

• ruler
• scale
• microscope

Which of the following is the proper way to attempt to determine the identity of an unknown substance?

• Put the substance close to your nose and sniff it.
• Taste a very small amount of it.
• Put a small amount on your skin and see if it burns.
• Waft it toward your nose.

• A
• B
• C
• D

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

• A
• B
• C
• D