Junior Science: Ages 3.5-5

By Meredith Lamothe

Hello Science Families!

We’re halfway done with this session of science–I say it every time, but it always surprises me when we get to this point!

Today was all about opposites in junior science class!

We specifically focused on BLACK and WHITE! It was fun to talk about alllllll the many colors that we’ve learned about and all the shapes and then to step back and look at something as simple as black and white.

We talked about how black and white are opposites and some other things that are opposite (UP and DOWN, Smooth and Bumpy, Left and Right, Open and Close!)

ACTIVITY #1: Floating Crayons

Then it was onto our first experiment! We explored crayons! We wanted to see if a bunch of crayons on our trays would SINK or FLOAT (opposites!) We dropped in crayons–which made a great splash sound!–and then observed what they did. We noticed something very odd. All of our crayons were sinking EXCEPT our black crayons! Those floated!

We learned that black crayons float because the pigment used to make the black color isn’t as heavy as the pigments used to make the other color crayons.

Then we tried to see if there was anything on our table that might help the other crayons float. We couldn’t find any floaties or pool noodles–but we did see some salt. What would happen if we added salt to our water? WE tried it! After we added a whoooooole bunch of salt, all of our crayons started to float! We learned that this was because we were changing the density of the water and making it a lot easier for the crayons to float–just like it’s easier for us to float in the salt water of the ocean!

ACTIVITY #2: Black and White Process Art

Our next activity was experimenting with black and white paints. We started by using a little brush and trying out some black paint. Then we used a BIG brush and added some white paint. Those become gray! We kept experimenting, added some collage pieces, and just paint, paint painted!

blackandwhite(This photo is from Pinterest, but our paintings used the same idea!)

Our paintings were still veeeery damp at the end of class, so we’ll have to take them home next week–they’re looking more and more interesting as they dry!

See you next week!