The Earth is the only body in our solar system that has an atmosphere that is breathable to humans. The two main gases in our atmosphere make up about 99% of its volume. Scuba divers who dive to extreme depths do not use a mixture of atmospheric gases to breath, they use a ...
根据第一段“The atmosphere (大气层) on Mars is mostly made of carbon dioxide (二氧化碳).”可知,火星上的空气主要由二氧化碳组成。故选B。 (2)题详解: 推理判断题。根据第二段“NASA says that getting 4 astronauts home from Mars would take about 25 tonnes of oxygen.”可知,让四名宇航员从火星...
In the 1920s, Aleksandr Oparin, a Russian biochemist, proposed and developed the idea that life originated in the warm, watery environment of early Earth's surface, under an atmosphere mostly composed of methane. The early seas were believed by Oparin to be rich in simple organic molecules,...
Others disagree.Derek Briggs of the University of Colorado questions the benefit of testing students during these trying times.“All students are going to need some serious help over the next year to make up for what’s been a pretty tough time,” he says. That thought delights those parent...
Earth is surrounded by a blanket of air, which we call the atmosphere.The atmosphere is the mixture of gases and other materials that surround the Earth in a thin, mostly transparent(透明的)shell.It is held in place by the Earth's gravity.It reaches over 560 kilometers(348 miles)from ...
百度试题 结果1 题目The atmosphere of Mars ___(be) made up mostly of carbon dioxide. 相关知识点: 试题来源: 解析 3. is 反馈 收藏
The mountainous terrain brings frequent, gentle rains that keep the surrounding landscapes lush and green, creating a picturesque setting perfect for those who prefer a milder atmosphere. The Amazon region offers a tropical climate ideal for retirees drawn to nature, biodiversity, and the allure of ...
Planet Earth is made up of four overlapping subsystems that contain all of world’s land masses, water sources, living organisms, and gases. These four subsystems are known as spheres. Geographers break down the Earth’s systems into four spheres that make up the world’s air (atmosphere),...
The atmosphere is the mixture of gases and other materials that surround the Earth in a thin, mostly transparent(透明的)shell. It is held in place by the Earth's gravity. It reaches over 560 kilometers (348 miles) from the surface of the Earth, so we are only able to see what ...
Components of the Atmosphere | Gases & Importance from Chapter 19/ Lesson 1 158K Learn what gases make up the atmosphere. Identify the components of the atmosphere and understand the significance of the composition of gases in Earth's air. ...