Fats, carbohydrates, and proteins are the three main nutrients in the food we eat. Vitamins and minerals are also important, but this WonderScience will focus on fats, carbohydrates, and proteins.
Chemistry is very important when making a sculpture. In this activity, you will use a substance called plaster of paris which is made of chemicals that harden when water is added.
Inventions in communication have also been very important. The radio, television, telegraph, telephone, computer, and satellite are all inventions that have helped people communicate over long distances. Try the activity below and then see if you can invent a better way to communicate over long distances without having to scream!
Going Round In Circles
Can you measure a length or distance if it is all squiggly and wavy? Sure! If a bicycle or a car has an odometer, it measures the distance the bike or car travels, whether you are traveling up or down a hill, around curves, or turning a corner.
Rainbows from a cup of water.
Which Mixture is the best Mixer?
In the following activity you will learn which soap or detergent makes oil and water mix the best.
People who lived in ancient civilizations needed a way to measure and compare the size of different things. Several of these civilizations invented ways of measuring using parts of the body! The cubit, for example, was equal to the distance from the end of the elbow to the tip of the middle finger. There was a big problem with this way of measuring, which you can discover in the following activity.
The Ball and Cup is a traditional toy found in many cultures around the world. Soon it will be found in space! Astronauts aboard the shuttle are going to try to use the ball and cup in orbit. Make your own ball and cup for use on Earth, and then predict what the astronauts will have to do in space to get the ball to land in the cup!
A TOTAL WASHOUT? Soap makes better suds in fresh water than in salt water. See if fresh water or salt water is better for rinsing suds away!
DENSITY DESSERT
You will need
1 4-oz box of lemon gelatin 1 8-3/4 oz can of fruit cocktail (drained)
measuring cup mixing bowl mixing spoon 4 8-oz clear plastic cups
1 8-oz container of whipped cream cheese at room temperature
1. Put the dry lemon gelatin in the bowl. Add 1 cup of hot tap [...]
