What science experiments can be done in the third grade of elementary school, how to write

The science experiments that can be done in the third grade include: triboelectric electricity, garlic sprouting experiment, paper experiment that cannot be broken, ice fishing, bouncing eggs, paper that does not get wet, toothpick speedboat, rainbow bridge, angry bottle, floating coin, rainbow rain, bouncing bubbles, color change, etc.

Example of a Grade 3 Science Experiment (with detailed steps):

Experiment 1: Bouncing bubbles.

Materials: water, dish soap, glue, straw, gloves;

Experimental steps: 1. Prepare water and dish soap into a mixed solution in a ratio of 3:1, dip the solution with a straw, and blow bubbles, but the bubbles are easy to break;

2. Mix the glue and the mixed solution in a ratio of 1:2, and then dip the solution with a straw to blow out the bubbles. Touching the bubble with gloves not only makes it difficult to break, but it also bounces when touched by hand.

Experimental principle: The bubble in step 1 is explosive due to the evaporation of water, and it will become very sticky after adding glue, and the water will not evaporate easily, and the strength of the bubble film will increase, so it can jump on the back of our hands.

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.

Experiment 3: 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.

The process of making a science experiment in Grade 3 is as follows:Tools and materials needed: plastic bottles, foam balls, spoons, foam boards.

1. Prepare the tools and materials for the triboelectric experiment, including plastic bottles, foam balls, spoons, and foam boards, as shown in the figure below

2. Open the bottle and take out the spoon as shown in the picture below

3. Take the foam ball with a spoon, as shown in the figure below

4. Put the foam ball into a transparent plastic bottle, as shown in the figure below

5. Shake the foam ball in the bottle as shown in the figure below

6. Take a foam board and rub it on your hair to start electricity, as shown in the figure below

7. Put the foam board close to the plastic bottle and observe the experimental results, as shown in the figure below

1. Prepare the tools and materials for the tribosis and electrical experiment, including plastic bottles, foam balls, spoons, and foam boards, as shown in the figure below.

2. Open the bottle and take out the spoon as shown in the picture below

3. Take the foam ball with a spoon, as shown in the figure below

4. Put the foam ball into the plastic bottle of Toushu Zaoming, as shown in the figure below

5. Shake the foam ball in the bottle as shown in the figure below

6. Take a foam board and rub it on your hair to start electricity, as shown in the figure below

7. Put the foam board close to the plastic bottle and observe the experimental results, as shown in the figure below