Earth has an atmosphere. The atmosphere protects us from harmful rays. What is the atmosphere made of? A. Water vapor B. Gases C. Soil D. Rocks 相关知识点: 试题来源: 解析 B。解析:地球有大气层,大气层保护我们免受有害射线的伤害。大气层是由气体组成的。选项 A 水蒸气只是大气层的一部分...
To perform the function of hearing, the ear converts the energy of pressure waves moving through the air into nerve impulses that the brain perceives as sound. Vibrating objects, such as the vocal cords of a speaking person, create waves in the surrounding air. These waves cause the eardrum...
The process by which a meteor glows when moving through the upper atmosphere is called ablation, and it stops at the retardation point. If the meteor hasn't been completely consumed, it falls to the ground as a dark rock. Scientists believe that meteorites are probably cool when they hit th...
Their theory about the nature of the atmosphere was that nothing was holding it down. So, if, if you can understand that way of thinking, then clearly, if the Earth, was moving at a great speed, we should have lost all our atmosphere a long time ago. You know, it would be, like,...
if the Earth, was moving at great speed, we should've lost all our atmosphere a long time ago.You know, it would be, like, trailing away behind us.And so I wanna try a little thought experiment. Because I—I think that what we'll find is that some of us have ideas about motion...
To perform the function of hearing, the ear converts the energy of pressure waves moving through the air into nerve impulses that the brain perceives as sound. Vibrating objects, such as the vocal cords of a speaking person, create waves in the surrounding air. These waves cause the eardrum...
题目The atmosphere protects the earth. What is the atmosphere made of? A. Gas and dust B. Water and fire C. Earth and moon D. Stars and gas 相关知识点: 试题来源: 解析 A。本题考查对大气层组成的了解,大气层由气体和尘埃组成。B 选项水和火不对;C 选项地球和月亮不对;D 选项星星和气体...
; groundwater that saturates the soil and rock beneath our feet; ice and snow found in polar regions and mountain peaks; and water vapor present in the atmosphere. Together, these forms of water play a key role in supporting life and regulating the planet’s climate.Related:Water on Earth...
The ancient books such as the Bible, through the medium of writing, wrote the scenes of the partial doomsday of the last doomsday, which was limited to the doomsday of the earth, the self-produced doomsday of the earth, not the more irresistible doomsday from the sky. Why can that ...
Earth's Atmosphere:Earth's atmosphere is made up of layers of gases that surround the Earth and extend out into outer space. The closest level to the surface of the Earth is called the troposphere. The other levels are the stratosphere, mesophere, thermosphere, and exosphere....