Science Topic Observing a snail, how to observe a snail?

Answer 1: Because the snail moves in waves, moving its body forward, if the place under its feet is dry, they cannot move, so the gastropod secretes a very rich mucus to help it crawl, and this mucus quickly dries and shines as soon as it encounters the air. So much so that wherever the snail crawls, it leaves a shiny trail...

Answer 2: The purpose of snails crawling around is to find food, mate and reproduce offspring, etc. Answer 3: Snails have vision and prefer dark environments.

Answer 4: Snails have a sense of touch.

1.The snail will crawl into the shadows.

2.The foot will shrink.

The body will rope up.

Antennae, tentacles will retract.

3.How to write the quality, I haven't weighed it, this is in the experiment book, the teacher should have let me do it, the quality of each snail is different, you can write just one, don't write too heavy.

4.Same as above.

Answer five: Snails have a sense of smell. Will taste.

Answer 6: Snails have a sense of hearing.

1 Snails will crawl into the shadows, snails prefer dark places.

2. React and will shrink.

3 is between grams and grams.

4 20 is just 7 grams, and the average is grams.

In a science class, the teacher asked us a question: Why can a snail grind a cherry blossom on a knife? When I got home, with such a question, a thought suddenly flashed through my mind - Praise to observe snails.

I found a snail in the grass in the defeated community, put it on a kitchen knife, and saw the snail crawl up along the blade. At first, I was worried about whether the snail would die. Slowly, I saw a white line left where the snail crawled.

I looked up the Internet with curiosity and finally realized that the white thing turned out to be snail slime. I touched the bottom of it with my hand again, and I only felt that it was slimy, and there were faint small grains, what was it? After consulting the books, I found the answer, it turned out that the small grain was its feet, and the slimy was the snail's excrement, which helped the snail crawl.

During my observation, I discovered another secret of snails - they like to climb to high places. I saw that the snail stretched its neck long, as if looking for a higher foothold. If it is sure that it does not, it will not climb down, but will turn around and return the way it came.

It seems that it will not rest until it climbs to the top.

It turns out that the little snail also hides so many secrets. It seems that as long as we observe carefully, explore and think, we will definitely be able to discover the secrets of nature.

Monday, July 11, 2011 Sunny.

The teacher asked us to write a diary about scientific observations during the summer vacation, what to write? I thought about it for a long time, and by the way, let's write about the growth of beans! I took a cup and put a small handful of soybeans in it. At this time, I really hope that they will grow up quickly.

Tuesday, July 12, 2011 Fine.

In the morning, before dawn I got up quickly, went to the kitchen, looked at the dear ones, I changed the water for the soybean, and picked one up and pinched it in my hand, and found that its skin had become soft, wrinkled like an old woman's face, and it had grown a lot.

Wednesday, July 13, 2011 Sunny.

Great, the soybeans have broken out of the skin, only to see those soybeans white and fat, some have taken off all the skin, some only half off, there are still some skins floating on the top of the cup, looking at these soybeans in a thousand postures, I happily jumped three feet high.

Thursday, July 14, 2011 Sunny.

The sprouts had grown half an inch long, and there were many roots growing on the tips of the sprouts, and my father told me about the roots of the sprouts. These sprouts were presented to me in their most beautiful form, which made me excited.

I can't help but have a deep respect for the sprouts, which thrive on just some water and without too much nutrition. Isn't this the kind of tenacious fighting spirit we need to grow up?

We often use the term "snail crawling" to describe its slow speed. Actually, it is precisely said that snails do not crawl, but glide. Wherever it passes, it has a layer of nián secretion, so that even if the snail climbs on a sharp blade, its body will not be cut.

The snail is afraid of the sun because the sunlight will dry its body. It spends most of its time sleeping in its shell, which is also closed with a layer of mucus. It can sleep for months on end throughout the winter.

The snail's mouth is smaller than the tip of a bamboo, but it has 25,600 teeth. Of course, these teeth are invisible to our naked eyes. If we put the snail in a cardboard box, it can escape with a hole in its teeth.

Its eyes are at the tips of its antennae, but its vision is weak. Fortunately, its sense of smell is extremely sensitive, which makes up for the lack of vision.

Because snails like moisture and are afraid of flooding. When wet, the snail's appetite is active, but flooding can suffocate the snail. So snails crawl after the rain in order to forage for food and to avoid flooding.

Snails are sensitive to environmental responses and are best suited for the environment: temperature 16 30 (23 30 at 23 30, the fastest growth and development); Air humidity 60% 90%; The humidity of the feeding soil is about 40%; The pH is 5 7. When the temperature is below 15 and above 33, it is dormant, and when it is lower than 5 or higher than 40, it may freeze to death or heat death.

There are 40,000 species of snails all over the world, and snails are distributed in all provinces and regions of China, living in dark and humid areas such as forests, shrubs, orchards, vegetable gardens, farmlands, parks, temples, mountains, flatlands, hills, etc. It feeds mainly on plant stems, leaves, flowers, fruits and roots. It is one of the agricultural pests and an intermediate host for some parasites of livestock and poultry.

Snails have high edible and medicinal value. Rich in nutrition, delicious, high protein, low fat, low cholesterol, rich in more than 20 kinds of amino acids and rich in snail enzymes, SOD, etc., the protein content is 1, 11, 3 and 7 percentage points higher than that of soft-shelled turtle, pork, beef and eggs respectively.

The fat content is only 1 and 1 70 of soft-shelled turtle, pork, beef and eggs. The snail is a terrestrial mollusk with high edible, medicinal and health value, and its edible and medicinal history has been more than 2,000 years.

After rain, the soil water will accumulate, the snail will be soaked, and it is very stuffy to make it impossible to breathe, and the air and temperature and humidity after the rain are also very suitable for the growth of snails, and they will take advantage of this excellent weather to come out to forage for food and mate.

Snails like to burrow into loose humus soil to inhabit, lay eggs, regulate the humidity in their bodies and absorb some nutrients, but they are very afraid of flooding, and if they do not crawl out in time after rain, they will drown.

Personally, I think. Rain leads to an increase in humidity in the atmosphere. At the same time, snails are very moist creatures. It is possible to avoid the trouble of dryness, as the snail has a layer of mucus. Have you ever seen a snail in a dry environment (not to rule it out).

Purpose. Since there are so many snails coming out of the house (shells), after all, it also increases the chance of reproduction. You can find a lot of mates, which increases the chance of breeding.