How was the surface when the spaceship returned into the earth’s atmosphere?A.Turned red.B.Nothing changed.C.Turned black.D.Turned soft. 相关知识点: 试题来源: 解析 C 当航天器返回地球大气层时,高速再入会产生极端高温(约1600°C以上),主要原因包括空气压缩加热和摩擦。此时,航天器表面的烧蚀材料(...
Harald Franzen
Geographers broadly divide the different areas of our planet into spheres. The atmosphere is the term most commonly used, referring to all air around our planet, while the hydrosphere refers to all water in oceans and lakes, and the geosphere refers to the hard rocks of the Earth...
The atmosphere on earth evolved into the current one with a protective ozone layer. Learn about the earth's ancient atmosphere, how the ozone layer has changed, and how human pollution has affected the ozone layer and led to global warming. ...
So that’s what created the water M: It’s not the collision that created water. Comets contain water. They’re made up mostly of cosmic dust and water. When they collide with the atmosphere, they break up. And the water they contain rains down to earth. Ocean water came from that ...
Photoautotrophs evolved from the heterotrophs by developing chlorophyll through mutation. They released O2 which oxidised atmospheric NH3 and NH4 that disappeared. This made the atmosphere an oxidising one
英语考试The atmosphere is a blanket of gases around the Earth,For thousands of years these gases have kept the planet's temperature at about 15°C.How?By trapping some of the sun's heat,But now,because of pollution,there are more and more hot gas
Mostly, the Earth's atmosphere blocks out photons with a shorter wavelength than ultraviolet light. This makes it difficult to study the Sun's inner workings from Earth directly. However, we do have our ways.Many ground-based telescopesuse a grid of sensors also known as a charge-coupled dev...
How do we know the speed of light? Ole Rømer was able to measure the speed of light by observing eclipses of Jupiter's moon Io. When Jupiter was closer to Earth, Rømer noted that eclipses of Io occurred slightly earlier than when Jupiter was farther away. Rømer attributed this ef...
facts of climate change. Her daughter, who is 9, learned about climate change at school through a kid-friendly analogy, comparing Earth’s atmosphere to a heat-trapping blanket. Emitting greenhouse gases is like changing from a light blanket to a heavy down comforter which makes the planet ...