What is the history of the Earth s average temperature change from the Earth s formation to the pres

The general trend is from high to low. But the change in temperature is a wavy curve, not a simple straight line. For example, the earth turned out to be a red-hot sphere to a sphere wrapped in water.

After the ice age, it is wrapped in water bodies. Repeat many times. The temperature is still declining at the beginning of the year.

1. Since the beginning of the universe, the core temperature of the singularity should be extremely high, but with the continuous development of the universe, the universe continues to expand, according to the explanation of the Bo effort equation, due to the increase in volume, the overall temperature is constantly decreasing, until the temperature in the universe is like this. As the cosmic dust attracts each other and accumulates, different galaxies are gradually formed, including the solar system.

2. The earth continues to accumulate from small to large, and the overall temperature is very low from the beginning, and the temperature of the inner core is also increasing due to the accumulation of more and more large, friction and extrusion in the interior, until the current lava is formed inside. At the same time, due to the increasing mass of the earth, more and more gases are attracted around, and the gas has a certain thermal insulation effect on the earth, so as to keep the side of the earth facing away from the sun from being too cold at night, so that life can be continued, evolved and evolved;

3. In the past, due to the backwardness of industry and medical technology, animals and plants made up for each other, and while the volcano produced a large amount of gas, the average of the total amount of gas was maintained, so in general, the temperature did not change much;

4. With the continuous development of industrial and medical technology and the wide application of fossil energy, the total amount of gas produced by human combustion of fossil energy far exceeds the total amount of gas produced by volcanic eruptions, the thickness of the earth's atmosphere continues to increase, and the thermal insulation capacity continues to increase, so in the past hundred years, especially in the past half century, the average temperature on the earth has been rising, resulting in the melting of snow. Once all the snow on the planet has deepened, the planet will heat up even more significantly, and it will not be stable until the use of fossil energy sources is stopped, which is why carbon emissions should be reduced.

5. If the use of fossil fuels is stopped in a hundred or even a few hundred years, will the average temperature of the earth fall? It should be possible. Because:

1) After the average temperature of the earth rises, the photosynthesis time of plants will be prolonged, and more solar energy and carbon dioxide gas can be absorbed; 2) In order to make the temperature on the earth more suitable for human survival, human beings will carry out corresponding artificial interventions, such as digging the Hongqi River to make the desert an oasis to better absorb gas and solar energy; 3) With the advent of population aging, the decline of the total population of the earth will become a reality, at that time, even if the fossil energy continues to be used, the total consumption will decline, which will reduce the trend of warming, 6, with the increase of the distance of the moon from the earth, the frictional warming effect of the moon on the earth's tidal action will also weaken;

7. During the life cycle of the sun, the warming of the earth should be controlled within the range of human survival. Once it is not suitable for human life, a large number of human beings will die, the total population will also decline, and the total amount of fossil energy used will also decrease, so as to automatically adjust.

1. The lithosphere in the outer layer of the earth is mainly solid rock, and its heat is mainly conducted; The mantle below the lithosphere is a fluid state, and heat transfer is dominated by convection. Geoscientists have calculated that from the surface to the center of the earth, the temperature rises from about 10 to 4,500. Specifically, near the surface, the temperature changes diurnal, seasonal, and multi-year cycles due to the influence of solar radiated heat, and this surface layer is called the thermosphere.

2. Near its lower interface, there is a depth zone about 20 to 30 meters below the surface, and the temperature remains constant all year round, equal to or slightly higher than the local annual average temperature, which is called the normal temperature layer. From the normal temperate zone down to the lower limit of the lithosphere, the temperature rises by 1 for every 30 meters of depth, and when it reaches the lower limit of the lithosphere, that is, nearly 200 kilometers deep, the temperature can rise to more than 1000, close to the melting point of the rock. At the boundary between the Earth's core and mantle, the temperature is about 3700.

At the interface between the inner and outer cores of the Earth's core, the temperature is about 4300.

3. For the earth, the sun's radiation can only cause the "warm ocean" on the earth's surface, and cannot affect the earth's interior. To explore the heat of the Earth's interior, we need to look at the history of the Earth from the formation of the Earth to the present. Earth scientists have found that in the early days of the formation of the earth, the process of various small celestial bodies colliding with each other to form the primitive earth produced a lot of heat, so the temperature of the early earth from the surface to the interior was very high, and the whole earth presented a molten state.

Since then, the earth has gradually cooled, forming a layered structure of the earth's crust, mantle, and core, and although it has been cooled for 4.6 billion years, there is still a lot of heat stored in the earth's interior. In addition to the early Earth heat sources, there are a large number of radioactive isotopes in the Earth's interior, and these radioactive isotopes continue to decay and release heat.

The heat inside the planet comes from the beginning of its formation"Accretion"。The subsequent heat comes from the decay of radioactive elements such as uranium, thorium and potassium. In general, the Earth's temperature gradually increases from the surface to the earth.

However, in the vicinity of the earth's surface, due to the influence of solar radiation, the temperature has diurnal variations, seasonal variations, and multi-year cycles. In the vicinity of its underlying interface, the ground temperature remains constant all year round, equal to or slightly higher than the local annual average temperature, which is called the normothersphere. The temperature that rises for every 100 m of downward deepening below the normal temperature layer is called the geothermal warming rate or geothermal gradient.

At present, the average value of the global measured geothermal flux is that the average value of the continental surface heat flux is basically the same as the average value of the seafloor. Areas where the surface heat flux value or geothermal gradient is significantly higher than the mean or background value are called geothermal anomaly areas.

The Earth's temperature is produced for two reasons:

One reason is from solar radiation. Sunlight has more heat energy, which is transferred to the earth, which is the increase in the temperature of the earth.

One reason is the heat stored in the Earth's interior. The Earth's interior also produces heat.

Based on the excavation of ancient rock formations, it is possible to infer the climate change of ancient times.

About 4 billion years ago, when the earth was just formed, the earth's volcanic activity was frequent, and the surface temperature was very high, reaching more than 300 degrees Celsius, and no life could survive.

About 1 billion years ago, the earth was basically formed, volcanic activity weakened, and the surface temperature was about 50-80 degrees Celsius.

About 500 million years ago, the Cambrian period of life erupted, and a large number of life was born at this time, when the earth became suitable for life, and the surface temperature was about 19-25 degrees Celsius.

About 300 million years ago, the earth had an unprecedented "great warm" period, the climate was very pleasant, at this time the life showed explosive growth, the earth's oxygen content increased, and many insects evolved huge bodies, known as the "giant insect age".

About 100 million years ago, the higher predator dinosaurs appeared and occupied the top of the Earth's food chain for 100 million years, when the Earth's temperature was about 19-25 degrees Celsius.

About 65 million years ago, an asteroid hit the earth, producing a strong ** and triggering a series of volcanic activities, the earth quickly warmed to more than 200 degrees Celsius, and a large number of organisms became extinct.

About 5 million years ago, volcanic activity basically stopped, and the earth was covered with volcanic ash and could not get sunlight all year round, so the climate began to cool, and the earth's temperature dropped to minus 30 degrees Celsius, and the north and south poles to minus 80 degrees Celsius.

About 1 million years ago, the Ice Age ended, and the temperature rose, and the Earth's temperature was about 18-25 degrees Celsius.

About 100 years ago, the industrial revolution began, emitting a large amount of carbon, leading to the greenhouse effect, and the average temperature of the earth increased by about 1 degree Celsius.

It's not just a matter of rising sea levels that the climate is warming to a certain extent. I think the atmospheric cycle, the water cycle, and the carbon cycle will be disrupted, the way of material and energy exchange will be cut off, and the earth will become a mess. Or like in "The Day After Tomorrow", because the water temperature rises, the warm ocean current no longer continues to move, and this piece is icy and snowy.

I think what our teacher said makes a lot of sense. No matter how much human beings change the earth and how the climate changes, the question will not be how the earth will change, but whether the earth will continue to be suitable for human life. All the consequences are put on a large time scale, such as hundreds of billions of years, trillions of years, and everything will return to dust, and the earth will still be that earth.

But because of these changes, the suitable environment for human life may be destroyed and perish. Like the dinosaurs, it became a creature that flourished in the Holocene but suddenly disappeared, leaving later intelligent beings to guess how humans perished.

After a few years, the Earth's climate will gradually warm, but after a period of time, it will gradually become colder...

The average temperature on the Earth's surface is 15 degrees Celsius. （）

a.It's too late.

b.Mistake. Correct answer: a