Lesson plan - Physical states of water

Water can be found in planet Earth in three physical states different: solid, liquid and gas. Changes intemperature and on atmospheric pressure from wherever she is cause the physical state of the water to change.

In this lesson plan, students will learn about the solid, liquid and gaseous states of water and will be able to observe in practice the state changes taking place.

you can save this lesson plan on the physical states of water in PDF at the end of the post. Enjoy!

Lesson plan - Physical states of water

THEME: physical states of water

SUGGESTED TIME: 3 classes

GOALS:

• See water as an important component of our body and the planet.
• Realize that without water, living beings would not survive.
• Recognize water in different physical states.
• Understand that changes in temperature and atmospheric pressure are responsible for changing the physical state of water.

MATERIAL REQUIRED:

• Water
• vase
• Ice mold
• pan with lid
• Ice
• Thermometer (infrared recommended)
• freezer or freezer
• Stove

DEVELOPMENT:

1st class

Begin the lesson by asking students where water can be found on our planet. Children tend to associate water with liquid and will probably name: river, lake, sea, ocean, pool, home filter, faucet, shower, etc.

Explain the difference between types of water: fresh and salt, potable and non-potable, for example.

Ask triggering questions like:

• But what about glaciers, what are they made of?
• What is the composition of the clouds?
• Where does the ice you put in your juice come from?
• Where does the water from wet clothes go when they are hung out on the clothesline?
• What if I put my bottle of water in the freezer?
• What is our urine and sweat made of?

Listen to the answers and try to name the physical states during the discussion.

It is important for students to know that 70% of the planet and our bodies are made of water, that we need water for all our metabolic functions in order for our bodies to function.

Write the three physical states of water on the board (solid, liquid, and gas) and explain each to students.

2nd and 3rd classes

Explain to students what atmospheric pressure is and talk about changes in temperature.

They should understand that atmospheric pressure will only change between different regions, therefore it is constant within the school. However, the temperature can vary if we put the water in the freezer or in a pan on the stove.

If the school has a kitchen available, run some experiments with the students. If not, experiment at home and film to show them.

Put water in a jar and measure its temperature using a thermometer.

Put half of this water in an ice mold (don't put too much, so it freezes faster) and the other half in a pot with a lid.

Take the ice tray to the freezer and the pot to the fire, remember that children should not handle the stove, this step must be carried out by an adult and children only observe from a distance safe.

Measure the water temperature in the freezer every 20 minutes.

Wait for the water in the pan to boil, observe that there is now a mist coming out of the pan, ask students what this means.

Cover the pot by showing students that the lid is dry, wait a few minutes, remove the lid and ask why the lid is wet now.

Place the ice, natural water and freshly boiled water (which still has steam) on the table. Show students that just by changing temperatures you now have water in 3 physical states: liquid, solid and gas.

ASSESSMENT:

Give different situations for the children to solve in writing and hand in:

1. A family will make juice and need water. Someone goes out to buy, but only brings ice. What to do to get water for juice?
2. A boy decides to make a mint tea, he puts water and the leaves in the pan and takes it to the fire. While it boils, he decides to take a walk in the backyard and meets a neighbor. The conversation lengthens and when he returns to the kitchen, all the tea water has dried up. Where did the water go?
3. Two brothers usually play and eat together, one of them drinks a lot of water and the other prefers to drink soda when he feels thirsty. What can happen to each of them?

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See too:

• Lesson plan - Practical class - Reproductive structures of the flower - 7th grade of Elementary School
• Lesson plan – Practical class – Importance of flowers for the environment – ​​7th grade of Elementary School
• Lesson Plan – How is the body of animals covered?- 3rd year of Elementary School