Why is the atmosphere essential for life?
Atmosphere is very important for sustaining life: It contains various gases like O2, CO2, N2 which are required for various life processes by plants and animals. (ii) gas is used by plants to prepare food by the process called photosynthesis (iii) Oxygen is required for burning, combustion and respiration.
Is there oxygen in the atmosphere?
About 21% of Earth’s atmosphere is oxygen. Oxygen is generated during photosynthesis by plants and many types of microbes. Plants both use oxygen (during respiration) and produce it (via photosynthesis). Oxygen can also form a molecule of three atoms, which is known as ozone (O3).
What are the sources of oxygen in the atmosphere?
Discuss Earth’s oxygen resources. Explain to students that rainforests are responsible for roughly one-third (28%) of the Earth’s oxygen but most (70%) of the oxygen in the atmosphere is produced by marine plants. The remaining 2 percent of Earth’s oxygen comes from other sources.
What are the two forms of oxygen found in the atmosphere state its importance?
The two forms of oxygen found in the atmosphere are: (i) Elemental oxygen is normally found in the form of diatomic molecule (O2) in the lower part of atmosphere. It is about 21% in the air and non-poisonous. (ii) Ozone is found in the stratophere part of atmosphere. It contains three atoms of oxygen (O3).
What is the formula of oxygen as it is found in the atmosphere?
At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless and odorless diatomic gas with the formula O2. Diatomic oxygen gas currently constitutes 20.95% of the Earth’s atmosphere, though this has changed considerably over long periods of time.
How is oxygen returned to the atmosphere?
Answer: Oxygen is returned to the atmosphere through photosynthesis.
What are the six 6 layers of the atmosphere?
Layers of the atmosphere: troposphere, stratosphere, mesosphere and thermosphere. Earth’s atmosphere has a series of layers, each with its own specific traits. Moving upward from ground level, these layers are named the troposphere, stratosphere, mesosphere, thermosphere and exosphere.
Does Earth Gain matter from space?
Nasa has calculated that the Earth is gaining energy due to rising temperatures. Dr Smith and his colleague Mr Ansell estimate this added energy increases the mass of Earth by a tiny amount – 160 tonnes. This means that in total between 40,000 and 41,000 tonnes is being added to the mass of the planet each year.