3rd Grade Science What Happened to Them

Mixing and Separation

Today we're going to study lesson eight.

What has happened to them".

Learning Materials. Light clay, colored paper.

Through previous studies, we know that if water is constantly cold, it will freeze;

If it is continuously heated, it will boil.

So what can happen to lightweight clay?

The little ones can give it a try.

Now let's take a look.

Xiaohua and Xiaokuo try it.

Xiaohua turned light clay into.

Two balls, one large and one small, and a five-pointed star was pinched;

Xiao Kuo mixed yellow and red light clay to make orange clay.

In the third grade, science has changed a lot and allowed them to learn certain learning methods.

In the third grade science class, we will generally study some natural phenomena that are closer to nature, weather conditions, and changes in geographical location.

Grade science, what happened to them, third grade science they are very difficult, and students now have a lot of pressure to study.

There are a lot of mathematics in the third-grade curriculum, Chinese and English must be learned well, and there are art ** microcomputer classes, and today's children are very tired.

I don't know, this may be a root, it will make people can't see clearly, and work hard to become a good person.

There must have been a lot of different things going on, that's why they expressed it like that.

3rd Grade Science, What Happened to Them? This should be a problem of elementary school, it should be a problem of education, what will happen? Your question is a little confusing.

The science experiments that can be done in the second volume of the third grade include: frictional electricity, garlic germination experiment, automatic rising water, unbreakable paper experiment, ice fishing, bouncing eggs, color change, etc. Let's take two of these experiments as examples:

Experiment 1: Self-elevating water.

Materials: candles, water, saucers, glasses;

Experimental steps: 1. Fill a dish with water;

2. Light the candle and put it in a saucer;

3. Buckle the glass to the candle;

4. When the candle goes out, observe the movement of the water.

Experimental principle: When the candle is extinguished, the water in the glass will gradually rise, and after rising to a certain level, it will stop. Because the candle burns, the oxygen in the glass is consumed, and this reduced oxygen is filled with water.

Experiment 2: Color change.

Experimental materials: purple cabbage, hot water, some cups, sugar, lemon, baking soda, alkaline noodles, white vinegar;

Experimental steps: 1. Shred or slice the red cabbage, put it in a cup, heat the water and soak, after 10 minutes, leave only the water, and filter the red cabbage.

2. Prepare a glass of sugar water, lemonade, soda, alkaline water, white vinegar, and boiled water.

3. Pour the water soaked in red cabbage into sugar water, lemonade, soda, alkaline water, white vinegar and boiled water, this is the original colorless liquid, all have a new color, and the color is not the same.

Experimental principle: purple cabbage contains anthocyanins, when it encounters substances with different acids and alkalinities, a chemical reaction occurs, so it changes the color, on the whole, it is red when it encounters acidic substances, blue when it encounters alkaline substances, and purple when it encounters alkaline substances.

1. The science content of the second volume of the third grade of the People's Education Edition is mainly divided into four parts, namely the growth and change of plants, the life cycle of animals, the change of temperature bending chain and water, and magnets.

2. The growth and change of plants mainly include understanding the stems, leaves, roots, sowing and growth of plants; The life cycle of animals uses the life of silkworms to help students understand the growth, development and reproduction of animals. The changes of temperature and early finger degree and water burial mainly describe the three forms of water and the daily phenomena of rain and water vapor. Magnets describe the characteristics of magnetism and the application of the compass.

1. The science content of the second volume of the third grade of the people's education edition is mainly divided into four parts, namely the growth and change of plants, the life cycle of animals, the changes of temperature and water, and magnets.

2. The growth and change of plants mainly include understanding the stems, leaves, roots, sowing and growth of plants; The life cycle of animals is used to help students understand the growth, development, and reproduction of animals through the life of silkworms. The changes of temperature and water mainly describe the three forms of water and the daily phenomena such as rain and water vapor. Magnets describe the characteristics of magnetism and the application of the needle. Rotten bump type.