Explanation:
Chlorophyll make food the plant can use from carbon dioxide, water, nutrients, and energy from sunlight. This process is called photosynthesis. During the process of photosynthesis, plants release oxygen into the air. People and animals need oxygen to breathe.
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Elements in group 1-2, 13-18, the number of valence electrons is related to the group number. For example, in the first group, the alkali metals there is one valence electron, however in group 13, there are 3 valence electrons. Valence electrons are also known as the outershell electrons.
Answer:
16.8dm3
Explanation:
2 moles of CO gives 1 mole of N2
2 moles of CO= 2* 28= 56g
1 mole of N2 = 1* 22.4dm
56g of CO gives 22.4dm3 of N2
42.7 of CO will give> (42.7*22.4)/56
=16.8dm3
1.melting
2.freezing
3.condensation
4. evaporation
5.sublimation
Explanation:
Causes of climate change are:
1.)Smoke from Vehicles and industrial activities
2.) Burning of polythenes.
3.) Because of green house effect
Effects are:
1.) Extinction of birds,plants and animals
2.) Melting of glaciers
3.) Rise in global temperature
