Labs For Physical And Chemical Properties And Their Changes

Observing a Candle

For the lab observing a candle we used candles to learn about how to distinguish physical and chemical properties. Before we lit a birthday candle we found all of its physical properties. These properties were that it was a solid, pink, and that the candle had small slits on the side. But the unlit birthday candle did not have any chemical properties. After we lit the candle the properties changed, which aloud the class to learn about physical and chemical change. The only physical change to the lit candle was it started to melt. Now the chemical changes were that the birthday candle was lit. This lab helped us understand about physical and chemical properties and their changes.

Pouring a Gas

                In the lab pouring a gas we created carbon dioxide by mixing vinegar and baking soda. Than we poured the gas over a lit candle and the candle went out. This was because carbon dioxide does not support fires. This lab helped us understand about gases. Also it taught us about physical and chemical changes.

Marshmallow Fun

In the lab marshmallow fun we learned about physical and chemical properties and about their changes.  First we had to describe the two marshmallows we were given. The first marshmallow was a solid. It was also small, fluffy, white, and squishy. The second marshmallow shared all the same qualities except it was larger than the first. Than the class had to rip the first marshmallow in half to observe a physical change that occurred. Than we had to eat the two half’s and describe how they tasted. They were so yummy and good, also very sweet. Next we lit the Bunsen burner and charred our second marshmallow. To char it we needed to set it afire and that was amazing. There was a giant fire ball for a few seconds, before I had to blow it out. Than we had to eat the hardened outside of the marshmallow, it was disgusting. All crunch and burnt. It didn’t even taste like a normal marshmallow. Than finally were we aloud to eat the good part of the marshmallow after we finished the lab. The good part is the melted, gooey insides of a burned marshmallow. This lab helped teach us about physical and chemical properties and about their changes.

Observing Changes in Matter

                In this lab we learned about physical and chemical properties and about their changes. To learn about physical properties we examined a sugar cube. It was small, cubed, white, sweat, sugary, hard, smooth, rough and it was a solid. First we had to crush a sugar cubed. We examined a physical change when it was all over. Than we pored the sugar crushed sugar into water and instantly it dissolved to create sugar water. The water tasted horrible. The sweat sugar taste was gone. It is like if u ever had bread and then it got soggy. The soggy bread just does not taste right, to wet. It is the same thing for the sugar. Next, we put two sugar cubes into a test tube and held that over a lit Bunsen burner. In minutes the sugar cubes started to melt and then bubble. This melted sugar now started to burn and there were brown and yellow patches in the white snow looking material that was melted sugar. Than it completely turned brown and it started to smoke. But we had to keep it over the fire till there was yellow smoke and once that happened the sugar was gone. In its place was carbon. Carbon is pitch black and fragile, but yet still rough. This lab helped teach us about physical and chemical properties and about their changes.

Test Tube Being Heated Over a Bunsen Burner