December 4

Matter- Gases

First grade scientists continued their study of matter with a lab that focused on gas and air. We know a gas is in a liquid when we see bubbles. I opened carbonated beverages, and poured them into baby bottles. The nipples did not have holes inside them, so look what happened when I shook the bottles! What gas filled the nipples?

How can we prove that there is air all around us? Can we catch some of the air and fill up a plastic bag?

We also demonstrated that there is air around us with these water-filled bottles. I punched a hole in the side of each bottle before filling them. When the scientists opened the bottle top, air pushed the water out of the hole. When they closed the bottle top, the water stopped flowing.

First grade physicists also explored Bernoulli’s Principle. Look what happens when you place a ping pong ball in the flow of air created by a hair dryer! When we placed a paper cylinder above the ball, the ball went flying through. Why? Will other balls float too? If not, why? Will the ball move through a wider cylinder? Click here to learn more.

We repeated the investigation with balloons over a fan. We added a tube of poster board to funnel the air. Would a beach ball float too?

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December 4

Sedimentary Rocks and Fossils

Sedimentary rocks are created from particles of sediment that accumulate in layers over a long period of time and harden into rock. They are often found near water and may contain fossils. I made a sedimentary rock by acting out a story about rain picking up sediments, soil, pebbles, shells, sand, and a small turtle as the water traveled across land. We pretended thousands of years passed and the sediments hardened into a rock. These resemble the conglomerate rocks we have in our rock boxes.

I found the following sedimentary rocks with these fossils when I was a child.

Before the holiday break, third grade scientists pressed shells or dinosaurs into clay at the bottom of a pond (bowl). Then we poured sediments on top of the impression and allowed it to harden. Today, we were paleontologists and excavated our fossils.