Science knowledge for grades 1 to 6, what is science for 6th grade

Grade 6 science is a subject that allows us to understand natural phenomena and explore the laws of nature. It encompasses a variety of fields such as biology, geography, physics and chemistry to help us better understand and cope with the problems of daily life.

In Grade 6 Science, we learned a lot of interesting things. For example, we learned about the taxonomy and characteristics of living things, the natural environment and weather changes on the Earth, studied simple physical and chemical phenomena, and learned how to conduct scientific experiments and observations.

Through the study of Year 6 Science, we also develop many important abilities. For example, we learned the ability to observe, think, ask questions, and solve problems, as well as how to collect, analyze, and process data. These abilities not only help us better understand and apply knowledge in the field of science, but also play an important role in daily life and learning.

In conclusion, Grade 6 Science is a very interesting and useful subject that helps us better understand and respond to natural phenomena while also developing our observation, thinking and problem-solving skills.

It reads as follows:1. Bacteria, mold, and viruses are different kinds (microorganisms).

2. The first to uncover the secrets of microorganisms was the Dutch biologist (Leeuwenhoek).

3. The vast majority of microorganisms can only be seen under a microscope.

4. Bacteria, mold and viruses can only be seen clearly with a microscope, so they are usually called (microorganisms).

5. At a suitable temperature, (lactic acid bacteria) will ferment milk into yogurt.

6. The use of bacteria can be (processing food), (producing medicines), (purifying the environment), (producing fuel).

7. Viruses and bacteria that endanger human health are called (germs).

8. Many infectious diseases are caused by (germs). Covering your nose and sneezing, rinsing chopsticks with hot water, and washing your hands with soap can reduce the spread of pathogenic bacteria.

9. Penicillium secretes a certain substance that can kill bacteria, this substance is called (penicillin).

10. Objects are prone to mildew under (warm) and (humid) environmental conditions.

11. (Cell) is the basic unit that makes up an organism.

12. Cells have different shapes, sizes, and functions.

The key points of science in Grade 6 are as follows:

1. When making a campus biological distribution map, there are too many types of campus organisms in some places and it is impossible to write them, you can: give the biological number and write the number.

2. Scientists' methods of classifying plants: Scientists mainly classify plants according to their (characteristics). For example, they divide plants into (flowering) plants and (non-flowering) plants according to whether they have flowers or not.

3. Types of animals: Among animals, there are (more than 1.5 million) species that have been discovered, and (insects) are the most diverse in the animal kingdom, and the known species have reached (more than 1 million), accounting for about 80%.

4. The purpose of the hook thorn is to (facilitate the hooking of the animal's fur to spread the seeds).

5. The relationship between organisms and temperature: Biologists have found that the colder the same organism, the larger the individual, the closer the body (round), and the outer exposed organs such as the nose, ears, and legs (smaller).

The important knowledge points of the sixth grade science are:

1. The device that can make us [labor-saving or convenient] is called [mechanical]. Among them, scissors, wrenches and other simple structures are also called [simple machinery], and common simple machinery is [levers, pulleys (fixed pulleys, movable pulleys, pulley sets), inclined planes, wheel axles].

2. Different tools have different uses, and different tools have different scientific principles.

3. A simple machine like a crowbar is called a lever, and it has three important positions, namely the fulcrum - the position where the lever is supported and turned; Force point — the point at which the force is applied on the lever; Resistance point – The point at which leverage overcomes resistance. 】。

4. Classification of leverage: [labor-saving lever - the distance from the force point to the fulcrum is large; 【Laborious lever - the distance from the resistance point to the fulcrum is large; [No effort and no effort lever - the distance from the force point to the fulcrum is equal to the distance from the resistance point to the fulcrum] The use of levers is not necessarily labor-saving [e.g.: labor-saving levers - bottle openers, paper cutters, garden scissors, etc.; Laborious leverages – surgical scissors, tweezers, chopsticks, etc.; Effortless and effortless leverages - staplers, seesaws, balances].

5. ["Although the weight is small, it can press a thousand catties"] is a typical example of the use of lever tools, and there are examples in life: claw hammers, needle-nose pliers, various scissors, tweezers, corkscrews, etc. [Three points of the small rod scale:

Rope lifting - fulcrum; Weighing pan – point of resistance; Weigh the scales - use hard.

6. The wheel and the shaft are fixed together, and the device that can be rotated is called [wheel axle], and the common wheel axle in life is: [door handle, car steering wheel, faucet, wrench, screwdriver, etc.].