5.The diagram below shows the composition of gases in the air we breathe in.Water vapour and Carbon dioxide other gases Oxygen Which of the options below correctly shows the changes in the composition of Tgases in the air we breathe out?(1)个(2)(3)(4) 相关知识点: 试题来源: 解析...
B Air is the mixture of gases that you breathe. You cannot see, smell or taste air but it is around you. Layers of air surround the earth, too, making up the earth's atmosphere. Oxygen is a gas found in the air. All animals,including humans, need it to stay alive.Nitrogen and ox...
A gas is matter in which the molecules are widely separated, move around freely, and move at high speeds. Examples of solids include the gases we breathe (nitrogen, oxygen, and others), the helium in balloons, and steam (water vapor)....
The creation of the Davy lamp in 1815 was to spark our continual awareness regarding the impact of gas and chemical pollution.doi:HUMPHRY DAVYStephensBorg, KeithJournal of Perioperative Practice
Breathe easier: Avoid medical-grade gas runouts Read the Article Focus more on patient care. We'll focus on your medical gases. Find out how we can help you with your gas supply needs and more. * First Name * Last Name * Company Title * Company Street Address * ZIP Code * Phone ...
Air pollution affects the air we breathe. It is made up of harmful gases, droplets, and particles. These make the air quality(质量) 1 . Many things can cause air pollution. Some air pollution is caused by burning fossil fuels(化石燃料). Oil is used to make gasoline for cars. Cars and...
它们保持空气凉爽和清洁。 2. They gases from the air and produce oxygen for us to breathe. 它们从空气中吸收有害气体,并产生氧气给我们呼吸。 3. They are air pollution. 它们主要对抗空气污染。 4. I know trees also our lives more convenient. 我知道树木也使我们的生活更方便。
The air we breathe on the surface is a mixture of several gases including oxygen, nitrogen, argon, carbon dioxide, and other gases in trace amounts. We breathe easiest with 21% oxygen present in the air. When other gases contaminant the air, the oxygen levels drop, and that is when the...
Air pollution canmake it hard for animals andpeople to breathe. What canwe do to stop air pollution? 20Great Gas FactsGases trap the heat from thesun in the air. This warms ourplanet.Volcanoes shoot gases androck out when they explode.These gases cause natural airpollution.Gases always ...
Ozone is a gas composed of three atoms of oxygen. It’s blue and has a strong smell. The oxygen we breathe has two atoms of oxygen and has no colour or odour. The ozone layer blocks radiation from the sun. Good ozone occurs naturally in the upper stratosphere ( the layer of space 6...