Post on 14-Jun-2015
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Block 4 – Lesson 1
AIR AND ITS PROPERTIES
Air is a mixture of gases such as nitrogen, oxygen, carbon dioxide, neon and helium. It also has some small solid particles in suspension, called environmental dust.
What is air?
Air is everywhere, not only in the atmosphere but also in the soil and water. It allows us to hear sounds, feel heat or cold, burn a fire, breathe, and for plants to do photosynthesis. There is life on Earth thanks to air.
Air is everywhere, not only in the atmosphere but also in the soil and water. It allows us to hear sounds, feel heat or cold, burn a fire, breathe, and for plants to do photosynthesis. There is life on Earth thanks to air.
Where is air?
Air forms a layer around the Earth. It is a gas impossible to touch, but possible to feel when it moves. Earth’s rotation and revolution together with sunlight produce wind.
Air forms a layer around the Earth. It is a gas impossible to touch, but possible to feel when it moves. Earth’s rotation and revolution together with sunlight produce wind.
Air forms a layer around the Earth. It is a gas impossible to touch, but possible to feel when it moves. Earth’s rotation and revolution together with sunlight produce wind.
Facts
Human activities are polluting air with toxic gases from industries, transportation and homes. These gases accumulate in the atmosphere and affect the first layers that protect the Earth: the troposphere and ozonosphere.
Problems
The solution to this problem is found in small individual actions:• Use energy saving light bulbs.• Use alternative means of transportation such
as bicycles to avoid carbon dioxide emissions.• Substitute the energy produced by fossil fuels
like: petroleum and coal with renewable forms of clean energy, like Hydraulic, Eolic and Solar.
• Use Biofuels.
Solutions
1. What is Eolic energy?
a) It’s the energy generated by the water.
b) It’s the energy generated by heat.
c) It’s the energy generated by the wind.
d) It’s the energy generated by the Sun.
Answer these questions
1. What is Eolic energy?
a) It’s the energy generated by the water.
b) It’s the energy generated by heat.
c) It’s the energy generated by the wind.
d) It’s the energy generated by the Sun.
Answer these questions
1. What machine produces Eolic energy?
a) The wind mill.
b) The wind turbine.
c) The dam.
d) The solar panel.
Answer these questions
1. What machine produces Eolic energy?
a) The wind mill.
b) The wind turbine.
c) The dam.
d) The solar panel.
Answer these questions
1 What is Hydraulic energy?
a) It’s the energy generated by water.
b) It’s the energy generated by heat.
c) It’s the energy generated by the Sun.
d) It’s the energy generated by the wind.
Answer these questions
1 What is Hydraulic energy?
a) It’s the energy generated by water.
b) It’s the energy generated by heat.
c) It’s the energy generated by the Sun.
d) It’s the energy generated by the wind.
Answer these questions
1. What structure produces Hydraulic energy?
a) The wind mill.
b) The wind turbine.
c) The dam.
d) The solar panel.
Answer these questions
1. What structure produces Hydraulic energy?
a) The wind mill.
b) The wind turbine.
c) The dam.
d) The solar panel.
Answer these questions
1 What is Solar energy?
a) It’s the energy generated by water.
b) It’s the energy generated by heat.
c) It’s the energy generated by the Sun.
d) It’s the energy generated by the wind.
Answer these questions
1 What is Solar energy?
a) It’s the energy generated by water.
b) It’s the energy generated by heat.
c) It’s the energy generated by the Sun.
d) It’s the energy generated by the wind.
Answer these questions
1. What machine produces Solar energy?
a) The wind mill.
b) The wind turbine.
c) The dam.
d) The solar panel.
Answer these questions
1. What machine produces Solar energy?
a) The wind mill.
b) The wind turbine.
c) The dam.
d) The solar panel.
Answer these questions
Answer these questions
1 What is Thermal energy?
a) It’s the energy generated by water.
b) It’s the energy generated by heat.
c) It’s the energy generated by the Sun.
d) It’s the energy generated by the wind.
Answer these questions
1 What is Thermal energy?
a) It’s the energy generated by water.
b) It’s the energy generated by heat.
c) It’s the energy generated by the Sun.
d) It’s the energy generated by the wind.