Presentation about water, sand, leaves, rock, paper, and wood presented to preschoolers: How it works when you put paper, rock, leaves, sand on top of the water.

Hello preschoolers! Today, we are going to learn about some fun and interesting things that we can find in nature. We have water, sand, leaves, rock, paper, and wood. Let's see what happens when we put them on top of the water.

First, let's start with the water. Water is a liquid that we use for drinking, bathing, and playing. When we pour water into a container, it fills up the space and takes the shape of the container.

Next, let's add some sand on top of the water. Sand is made up of tiny grains of rocks and minerals. When we sprinkle sand on the water, it sinks to the bottom because it is heavier than water.

Now, let's place some leaves on top of the water. Leaves are part of plants and trees. When we gently place leaves on the water, they float on the surface because they are light and have air pockets that help them stay afloat.

Let's add a rock on top of the water. Rocks are solid and heavy objects found in nature. When we drop a rock into the water, it sinks to the bottom because it is denser than water.

Now, let's place a piece of paper on top of the water. Paper is made from trees and is lightweight. When we place paper on the water, it floats on the surface because it is less dense than water.

Lastly, let's add a piece of wood on top of the water. Wood comes from trees and is a solid material. When we place wood on the water, it floats because it is less dense than water.

So, as we can see, different objects behave differently when placed on top of the water. Water, sand, leaves, rock, paper, and wood all interact with each other in unique ways. Nature is full of wonders and surprises! Thank you for learning with me today, preschoolers!

Title: Amazing Things Happen on Water

Introduction:

Hi, everyone! Today, we're going to explore what happens when we put different things on top of water. Let's learn about water, sand, leaves, rock, paper, and wood!

Experiment 1: Paper on Water--

Materials:
- Basin of water
- Piece of paper

Instructions:
1. Drop the piece of paper into the water.
2. Observe what happens.

Observation: The paper floats on top of the water.

Explanation: Paper is less dense than water, which means it weighs less for its size. So, it floats because the water pushes it up with a force that is greater than the weight of the paper.

Experiment 2: Rock on Water

Materials:
- Basin of water
- Rock

Instructions:
1. Drop the rock into the water.
2. Observe what happens.

Observation: The rock sinks to the bottom of the water.

Explanation: Rocks are denser than water, which means they weigh more for their size. When the rock is dropped into the water, the water pushes it down with a force that is less than the weight of the rock.

Experiment 3: Leaves on Water

Materials:
- Basin of water
- Leaves

Instructions:
1. Float the leaves on top of the water.
2. Observe what happens.

Observation: The leaves float on top of the water, but they may move around or get wet.

Explanation: Leaves are less dense than water, but they are not as flat as paper. So, they float because the water pushes them up with a force that is greater than the weight of the leaves. However, leaves can get wet because they have small holes that allow water to enter.

Experiment 4: Sand on Water

Materials:
- Basin of water
- Sand

Instructions:
1. Sprinkle the sand on top of the water.
2. Observe what happens.

Observation: The sand sinks to the bottom of the water.

Explanation: Sand is denser than water, which means it weighs more for its size. When the sand is sprinkled on top of the water, the water pushes it down with a force that is less than the weight of the sand.

Experiment 5: Wood on Water

Materials:
- Basin of water
- Piece of wood

Instructions:
1. Float the piece of wood on top of the water.
2. Observe what happens.

Observation: The wood floats on top of the water.

Explanation: Wood is a bit denser than water, but it also has air pockets inside it. These air pockets make the wood less dense overall, which is why it floats.

Conclusion:

We've learned that different things float or sink in water depending on their density. Paper, leaves, and wood float because they are less dense than water. Rocks and sand sink because they are denser than water. Isn't it amazing how water behaves?