Clouds are floating water.There are plenty of water molecules floating eo in the air. When cold water molecules meet dust or salt, they stick together. It makes tiny water droplets.Clouds are made of these tiny water droplets.Where do clouds come from? As the sun warms the Earth, water ...
What are the pathways of air through the respiratory tree descending into the lungs?The Respiratory System:The respiratory system is composed of the nasal cavity, trachea, transporting tubes, and lungs. This system serves the important function of gas exchange between the blood and...
What causes an air mass to have high pressure? How do air masses move? What causes an air mass to have a low pressure? What causes air pressure? What causes air currents to curve? How does the movement of air masses affect weather? How does the movement of air molecules cause pressure...
Air pollution is pollution that is mainly caused by the solids well as the liquid particles that are present in the air. Air pollution is very harmful to the human body as it causes cancer. Air pollution also causes aci...
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But what exactly are we all breathing? Roughly 78% of Earth’s atmosphere is composed of nitrogen generated by volcanic activity deep beneath the planet’s crust. The next major ingredient is oxygen, accounting for 21% of Earth’s air. While oxygen molecules have been around as long as ...
Separation of gases by fractional distillation isn't the only way to generate oxygen or nitrogen from air. A membrane generator uses a system of semipermeable, hollow-fiber membranes that allow smaller molecules in a sample of compressed air to pass while blocking the larger ones. This type of...
3. What does Mike think of doing housework? A. Enjoyable.B. Easy.C. Boring. 4. Why are most people against the new road? A It will be built too far away. B. It will cause too much noise. C It will ruin ...
So could it be that Earth really is unique? All living things on Earth are made of the same building blocks, long carbon-based molecules.所以地球真的是独一无二的吗？地球上所有的生物都有着相同的组成成分，即长碳基分子。Scientists now think that a large proportion of these molecules came from...
What Happens if Air Pressure ChangesAir pressure is the force exerted on you by the weightof tiny particles of air (air molecules). Although airmolecules are invisible, they still have weight and take upspace. Since there's a lot of "empty" space between airmolecules, air can be compressed...