Wednesday, September 27, 2017

Naked Egg and Osmosis

I'll be honest here, the main reason I keep a blog is so I can go back sometimes and remember what we did. This is especially the case now as we are now in the high school years. One of the universities in our area actually requires homeschoolers to list a lab and explain it, even down to the materials that we use. This is part of their application process. So this will be helpful in remembering what we did. 

Anyways, I don't have very many pictures for this lab, because well - I dropped the ball as we had family in town and forgot to take pictures. 

The first step to this lab is to get a naked egg (or two depending on how you choose to perform the experiment). If you aren't sure how to get a naked egg, you place it in vinegar for 24 hours. It's a pretty easy process. 

The things you will need for this lab are:

Corn Syrup
Water
Food Coloring
Glasses
2 Naked Eggs (or 1 if you do it the way we did)




The experiment for osmosis can be seen in this video: https://www.youtube.com/watch?v=FyYz-1gqt68. We changed it up in just putting one egg in corn syrup and then putting it in water the next day to see the change. 

We're loving doing these labs as they are definitely reinforcing what my high schooler has been reading during the week in the text. 

Friday, September 15, 2017

Our Edible Cell Project

My oldest had fun with this. We just used what we had in the kitchen to make her edible cell project. I offered to take her to the store and by candy to do it. However, being the smart girl she is, she said, "I don't want to waste money on candy I may not even like or eat." So we just used things we had on hand.

Everytime she was writing down the organelles in her "cell key," we were also going over the functions of them.

Fridays are our project days or lab days with biology. I'm loving the time with her doing these to make sure she is understanding what she is reading throughout the week. She seems to be loving it, too. Now that she is a teenager, I am savoring these moments.



Friday, September 8, 2017

Is it an acid or a base?

For this experiment, we used a red cabbage powder to determine if regular household chemicals or liquids were an acid or a base. You can make your own red cabbage powder. Click here to get instructions. You can also just do what I did and buy it offline. Red cabbage powder is the purple color indicator that scientist use to determine and measure whether something is an acid or base and it contains a natural pH indicator.








My oldest had fun doing this experiment with things around the house that she started grabbing more and more things from our cabinets to test it on. It's not every day that you hear your high schooler say, "This is cool," when it comes to science.




So we tested it on things like creamer, dish soap, vinegar, baking soda (dissolved in water), sugar (dissolved in water), lemon juice, etc. If it made the color pink or red, it was a base. If it made the color purple, it was neutral. If it made the color blue or green, then it was an acid.

It was a pretty simple experiment and you can take it a step further and get those pool strips that test water pH within a pool and actually try to indicate what the pH would be.