Need for lesson - Pictures of corals, a coral reef and a map or globe showing where reefs can be found.
can be pasted onto an index file card for quick reference
When we were visiting Australia, one of the things we found out, is that the Great Barrier Reef is located there. The Great Barrier Reef is the largest reef of all. Where are other coral reefs located? Coral reefs are found in oceans and are a kind of habitat to many species of animals and plants. Corals, or coral polyps, are small animals about the size of a fingernail. Each polyp has a mouth leading to a stomach. Most coral polyps live together in large groups called colonies. Polyps clump together and over a long time they create large, connected colonies called reefs. Not all corals build reefs, but most do. How does a coral colony begin? It begins with the young coral animal called a larva. The larva attaches itself to the seafloor and develops into a polyp. The polyp grows and later divides into two polyps and then those two polyps become four and those four them become eight and so on until there may be thousands of polyps in the colony.
Corals come in a variety of shapes, sizes, and colors. There are two types of coral though, hard and soft. Soft corals have a flexible skeleton that can bend without breaking. Corals can have branches, or be fan shaped, and some look like a brain. Coral reefs are home to many fish and invertebrate animals. Some of the most colorful fish in the world are found among the corals in a coral reef. Clown fish, angel fish, and parrot fish are some of them. Other animals, like clams, starfish, shrimp, and octopus are found to live among the corals in a coral reef. Many people like to visit coral reefs. It is like visiting a city full of beautiful colors and activity under the water.
Coral Matching - These are taken from the Internet and made into matching cards.
Coral Painting - These are from firstpalette.com. Children can color or paint them, cut them out, and glue them to make a little 'reef'.
Need for lesson - 3 packets of dry yeast, magnifying glass, 3 Ziploc bags, 1/4 cup lukewarm water, and 2 ts. sugar. (from Julie Williams Experiments)
Have a brief review of fungi. Show the children the yeast and explain that this is another kind of fungi. It is alive! Shake some out onto your hand. It looks like sand. We are going to try an experiment with the yeast, a fungus. Have first yeast packet on a tray that has a piece of black paper on it so the yeast stand out. Allow children to observe the yeast and look at it with the magnifying glass. The yeast doesn't seem to do anything, even though it is alive. Pour this yeast into one of the bags and set aside.
Now pour some other yeast onto the tray. Tell the children that we are going to mix this yeast with 1 ts. of sugar. One way to tell if things are alive is if they move together, or even absorb one another. Pour the sugar and mix it with the yeast. Is anything happening now? Pour this mixture into another bag and set aside.
Take the last packet of yeast and pour it into a bag. Add 1 ts. sugar to the bag. Into this bag we want to add water to see if anything happens. Put all three bags in a warm spot, like sunny window. Explain that we are going to see if anything happens to these three bags of yeast after they sit for a short time. Allow to just sit for about 20 minutes. After 20 minutes, check the bags and discuss what happened? The yeast is alive! Contents of bags can be poured out into different containers and observed by the children. When you add water to the fungi and give it a little sugar for food we see how it is actually alive. Explain that yeast is used for making bread.