F. Short answer type questions:
1. What do you understand by atmosphere?
2. What is the use of nitrogen?
3. How is carbon dioxide useful for the plants?
4. How is oxygen useful for us?
5. Name the densest layer of the atmosphere.
6. Which layer of the atmosphere helps in radio waves transmission?
7. What are ions ?
8 In which layer do we find the ozone gas and how is ozone gas useful to us?
9. Which atmospheric layer merges with the outer space?
10. What is atmospheric temperature ?
Answers
Answer:
1.An atmosphere is the layers of gases surrounding a planet or other celestial body.
2.Various laboratory reactions that yield nitrogen include heating ammonium nitrite (NH4NO2) solutions, oxidation of ammonia by bromine water, and oxidation of ammonia by hot cupric oxide. Elemental nitrogen can be used as an inert atmosphere for reactions requiring the exclusion of oxygen and moisture.
3.Studies have shown that increased concentrations of carbon dioxide increase photosynthesis, spurring plant growth. ... While rising carbon dioxide concentrations in the air can be beneficial for plants, it is also the chief culprit of climate change
4.Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive. Oxygen is generated during photosynthesis by plants and many types of microbes.
5.troposphere
6.ionosphere
7.an atom or a molecule that has gained or lost one or more of its parts (electrons) and so has a positive or negative electric charge
8.Ozone is a gas made up of three oxygen atoms (O3). It occurs naturally in small (trace) amounts in the upper atmosphere (the stratosphere). Ozone protects life on Earth from the Sun's ultraviolet (UV) radiation.
9.Exosphere
10.Atmospheric temperature is a measure of temperature at different levels of the Earth's atmosphere. It is governed by many factors, including incoming solar radiation, humidity and altitude.
Answer:
1. atmosphere is the layers of gases surrounding a planet or other celestial body. ... These gases are found in layers (troposphere, stratosphere, mesosphere, thermosphere, and exosphere) defined by unique features such as temperature and pressure.
2. Nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter.
5. troposphere
6. ionosphere
9. exosphere