What is water like in 1st grade science, elementary science 1st grade

Teaching objectives: 1. Be able to directly perceive water with various senses, and describe the morphological characteristics of the observed water in words.

2. Use the method of comparison to identify the characteristics of objects.

3. Understand what water is like.

4. Understand the three common states of matter: solid, liquid, and gaseous.

5. Willing to cooperate and communicate.

6. Develop a good habit of observing things comprehensively and carefully.

Teaching preparation: 1. A variety of different shapes of water containers and syringes.

Plastic bags, glass plates, etc.

2. Soy sauce, vinegar, salt water, water, sugar water, oil, etc.

Teaching process: 1. Introduce new lessons.

Water is an object that we see every day, so let's study what kind of object is water. (Board book topic).

2. Experiment and solve problems.

1. Experiment 1.

1) Pour soy sauce, vinegar, salt water, sugar water, and water into the beaker.

Use your eyes, nose, and tongue to discern their color, smell, and taste.

2) Place a white piece of chalk on the back of each cup of liquid and allow students to observe how transparent they are.

3) Discuss: What kind of object is water?

4) Induction: Water is a colorless, odorless, and transparent liquid.

2. Experiment 2:

1) Slowly drip the water onto a horizontally placed glass plate and observe if the water flows in all directions.

2) Have students observe their stationery boxes, erasers, textbooks, etc., and do they flow on the table?

3) Pour water into containers of different shapes, and observe whether the water has a fixed shape and a certain volume.

4) Do you have a fixed shape for your pencils, erasers, and textbooks?

5) Summary: Water is fluid, has a certain volume, and has no fixed shape.

3. Ask students to compare the differences between water (liquid) and wood blocks, glass beads (solids), and air (gases).

1) Comparison of water with wooden blocks and glass balls: The difference is that water does not have a fixed shape, while wooden blocks and glass balls have a fixed shape.

For water, it's a clear, flowing liquid.

If we want to popularize the knowledge of water to children in the first to third grades of primary school, we should first teach children to understand water, first observe water, and understand that water is colorless and odorless. Then tell the children how the water comes from. Finally, you can give the children a science about the water resources on the earth, including seawater and fresh water, and then you can further tell the children that fresh water resources are relatively scarce, and the children must cherish and care for water resources, do not waste water, and save water.

If it is a 4 to 6-year-old child, the characteristics of water can be omitted, because they already know it, and they can directly tell them how water is formed. And then the most important purpose is also to tell them to save water and cherish the water resources on the earth.

1Place the corner of the towel in a basin of water, and the whole towel will slowly become wet, explaining this phenomenon capillary phenomenon).

2In hot weather, sprinkle some water on the ground, the room will be cooler, why?

Evaporative endothermy).

3In wet weather, wet clothes are not easy to dry, why?

The ambient vapor pressure is high).

4Fog often grows early in the morning and recedes before noon, why?

Fog is the result of water vapor condensation, and when the temperature is high, the water vapor will naturally evaporate 5 Why is there always an iron chain at the rear of the tanker truck dragging on the ground?

To prevent static electricity, the static electricity generated by the friction between the oil and the car can be directed to the earth)6 Sometimes there are a few white clouds floating in the blue sky, why are these clouds white?

White is actually a mixed color, because clouds can absorb a variety of colors )7 What are the benefits of using a red light to indicate a stopped traffic signal? Why not use blue or purple lights?

Red light has strong penetration, and blue and violet light generally travel at a short distance).

Butterflies with elephants, polar bears, bees.

Ability Training Introduction] Natural science is something that many people will want to know, but most people are not clear about the basic knowledge of natural science. What's next? What are the natural science knowledge shared by the worry-free test network, I hope it will be helpful to you.

Knowledge of natural sciences].

1.When the fish sleeps? Sleep with your eyes open.

2.What is earthworm food? Mud blocks.

3.What is the queen bee in bees? Female bees.

4.Which of the following is NOT a freshwater fish? Shark.

5.When dandelions spread seeds? Rely on the wind.

6. What is the point that plays a supporting role in leverage? Pivot.

7.What is the hardest part of the human body? Tooth.

8.What kind of animal is a dinosaur? Reptiles.

What are the uses of water.

There is no substitute for the substance.

There will always be a way for many things to be done this way or that. For example, lighting, without electric lights, we can light candles; Without candles, we can light oil lamps; Without oil lamps, we can light pine torches; There were no torches, so we had to wait quietly for the night to pass and the day to come. It's a different story with water.

Without water, we can't wash our faces, brush our teeth, quench our thirst, there are no fish and shrimp on the table, we can't see flowers and trees, we don't know what swimming is, all ships are scrapped, concrete can't be stopped, high-rise buildings can't be built, and even little dolls cry without ......tearsAh, it's better not to think about it!

Water as a liquid can play a variety of roles, and most of the other substances cannot be replaced. This is mostly due to some strange temper of the water. For example, water is densest at 4 degrees Celsius, and then it is cold, but the volume expands, so ice is lighter than water, floating on the surface of the water, ice is not good at heat transfer, so it will not freeze to the end, to ensure that underwater organisms are safe for winter; The heat capacity of water is very large, which is 10 times that of iron, 5 times that of sand, and 4 times that of air, so the oceanic climate is mild, and the human body also relies on water to maintain body temperature; The three states of water (water, ice, and water vapor) can coexist in their natural state; The cohesion and surface tension of water allow water to "contain" water in the crevices of rocks and soil, and water can "climb" high treetops to deliver water and nutrients to plants; Almost anything can be dissolved in water, so fish can get oxygen from the water.

There are three forms of water on Earth – liquid, water; solid, ice; Gaseous, water vapor.

Liquid water is mainly found in rivers and lakes, oceans and underground; Solid water is mainly found in the form of ice in the ice sheets of the North and South Poles and in the high mountains of the Queyan Glacier, and gaseous water is found in the air.

Water in nature refers to natural water such as river water, lake water, well water, sea water, rainwater, river water, and groundwater.

There are three states of water in nature: (liquid), (solid), and gaseous, and these three states can be converted into each other under certain conditions.

Water is the source of life, and we can't do without it every day.

1.The source of human life.

On Earth, where there is water, there is life. All life activities originate from water.

2.The source of life for plants.

Water transports nutrients to plants; Water keeps the branches and leaves of plants graceful; Water participates in photosynthesis to make organic matter; The evaporation of water keeps the plant at a stable temperature and does not burn it from the sun. Not only are plants full of water, crops consume water throughout their lives.

3.The blood of industry.

Water, which participates in a series of important links in the production of industrial and mining enterprises, plays an important role in manufacturing, processing, cooling, purification, air conditioning, washing, etc., and is known as the blood of industry.