Chemistry makes a very interesting topic for home school science curriculum, as it focuses on the reaction between the two substances, changes in colors and the production of heat, light and sound energy.
We see changes all around us as the boiling of an egg, but my pop corn, ripening bananas, baking of muffins, fuel wood, the bursting of crackers, tearing of the paper sheet, lighting up game character, rotting garbage, rolling of dough, etc. Some changes are desirable, but others are uncomfortable. Some of those changes are physical and some chemical changes
You will learn the world of school science curriculum there are two kinds of changes : .. Physical and chemical changes
A physical change is a change in the substance may look different, but it is the same substance. For example, when you pull the blade, the result is a piece of paper, but it is still paper.
A chemical change is when the atoms within molecules get rearranged to form other chemicals. Also there is a change of color and energy is either released (exothermic) or absorbed (hell). For example, when you burn paper, molecules that paper is made up of undergoing changes and you get a solid ash and gaseous molecules of carbon dioxide and carbon monoxide.
How does one tell whether the change is a physical one or a chemical one?
I’ll give you Some Simple Tips
There is a material change if .:
- There is a change in color
- New materials formed
- A gas (bubbles) is released
- Energy is released in the form of heat, light and sound (exothermic) and the material will be hot
- Energy absorption (hell) and the content will be cold
do this now!
Your Home Chemistry Lab
The Lab Setup: You’ll need a sturdy table (granite countertop is great). Cover the table with a plastic tablecloth. On the table instead of little bottles with various liquids or powders (substrates), measuring spoons and muffin cups (instead of tubes)
Material :. Water, rubbing alcohol, vinegar (acetic acid), citric acid (the grocery store), clear dish liquid (Ivory), hydrogen peroxide, washing soda (sodium carbonate), baking soda (sodium bicarbonate), salt (sodium chloride), sugar, cream of tartar (grocery store), etc.
goal To determine which reactions are chemical changes and which ones are physical changes (tips, above)
Procedure :. Take the muffin cups and mix two or more liquids and / or dust, and see what happens. Touch cup and feel the increase or decrease in temperature. First, you can mix anything you want
Prudential :. Although these substances are safe for operations home school science curriculum, they can cause dry and itchy and sore eyes. So wear gloves and goggles
Try the following combinations and write your comments :.
Citric acid + water + soda
baking soda + vinegar
baking soda + water
Salt + water + liquid soap
Sugar + Water
Salt + water
Sugar + salt + water
Citric acid + liquid soap
Washing soda + Vinegar
baking soda + cream of tartar
Vinegar + water
You will be amazed at the color changes, bubbling sound and heat production. Enjoy!
Chemistry was never so much fun, was it? Check out the free “Home School Parent’s Guide to teaching science”, for great science experiments and activities by clicking on the link below.