Cells and Homeostasis: Eggsperiment Day 1

This week we will be learning about cell membranes.  Today, students began the process of dissolving chicken egg shells by pouring vinegar into a cup containing an egg.  The egg shell should dissolve by Thursday, at which time students will gently rinse the egg, measure the mass of the egg, and then transfer the egg to a new liquid.  Depending on the properties of the new liquid, the mass of the egg may change.  Also today, students measured the concentration of oxygen and carbon dioxide both in the room air and bubbling off of eggs that had been sitting in vinegar since this morning.  We will collect O2 and CO2 class data on Wednesday.

Note: Students collected oxygen (O2) as a percentage (%) and carbon dioxide (CO2) as ppm (parts per million).  To convert ppm to %, simply divide ppm by 10,000.

Remember: In honor of Veteran’s Day, there is no school tomorrow.

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s