There’s a much better way to teach kids aside from reading books. Here are 10 easy science experiments you can do with your kids today that they’ll definitely remember far longer compared to when they just read them from the books!
Click the “next” arrow for these 10 easy science experiments. Get ready for great learning and some awesome fun!
Purpose
To determine the effect of dissolved nutrients on the freezing rate of water. How does this affect the freezing rate of plants?
Materials
- 2 5-ounce (150 mL) paper cups
- tap water
- masking tape
- marking pen
- refrigerator
- 1 teaspoon (5 mL) salt
- spoon
Procedure
- Fill both cups with water. Use the tape and marking pen to label one salt water and the other water.
- Add the salt to the cup labeled salt water and stir.
- Place both cups in freezer.
- Observe the cups periodically for 12 hours.
Results
The salt water never freezes as hard as the pure water.
Why?
Salt lowers the freezing point of water. The pure water was able to freeze at a warmer temperature than the salty water. Plants freeze at different rates. Their surface area affects this, but it is also possible that the amount of dissolved nutrients in the cell fluid affects their resistance to the cold. Farmers find that bean, cucumber, eggplant, and tomato plants cannot stand even the lightest frost while plants like broccoli, brussel sprouts, cabbage and turnips can withstand heavy frosts. Some of these durable plants have large leaves. The materials dissolved in the leaves may help to make these plants more frost resistant.
Magic Solution
Purpose
To float an egg in a “magic solution”.
Materials
- 2 clear, plastic cups
- tap water
- ¼ teaspoon (1.3 mL) milk
- 3 tablespoons table salt
- spoon
- 2 small eggs
Caution: Always wash hands after touching an uncooked egg. It may contain harmful bacteria.
Procedure
- Fill both cups ¾ full with water.
- Add the milk to 1 cup of water. (This will be referred to as the magic solution.)
- Place an egg in each cup.
Result
The egg floats in the “magic solution” but floats in the milky solution.
NOTE: If the egg does not float in the magic solution, add more salt to the water.
Why?
The milk was added only to give the water a cloudy appearance like the “magic” salt water. The egg floats because it is not as dense as the salty water. The dense salt water is able to hold the egg up. The egg in the milky water is denser than the water; thus, it sinks.
