We use many different energy sources to do work for us. Energy sources are classified into two groups - renewable and nonrenewable.
Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is one of the green house gases which is contributing to global warming and air pollution.
On the other hand, renewable energy sources will never run out, are better for the environment and do not cause pollution. Renewable energy is often called green energy because it is a natural energy, always available and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.
1. What are fossil fuels?
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2. When were fossil fuels formed?
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3. Do carbon dioxide emissions causes climate change on Earth?
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4. How many types of renewable energy sources are there? What are they?
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5. Are renewable sources bad for the environment?
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6. Why is renewable energy called green energy?
My father has unusual hobby, carving eggshells. As everyone knows, eggshells are very fragile. My dad can make beautiful pieces of art from empty eggshells. It’s amazing. He started the hobby five years ago after a trip to the US where he saw some carved eggshells in an art gallery. My father did not go to class to learn how to carve. He learned everything from the Internet. I am my father’ son. My name is Ba. I like carving eggshells, too.
1.What is the name of the hobby?
a. Carving eggshells b. eggshells c. carving wood
2. When did he start the hobby?
a. 4 years ago b. 5 years ago c. 6 years ago
3. Did he go to class to learn how to carve?
a. Yes, he did b. No, he did c. No, he didn’t
4. Where did he learn to carve?
a. From his friend b. from the US c. from the Internet.
Viet Nam is a country in the South – East Asia. It has an area of 329,566 sq.km. Hanoi is the capital and Ho Chi Minh City is the largest city. The population of Viet Nam is about 80 million. It has age-old culture and long tradition of fighting against foreign invaders. Viet Nam is now a member country of ASEAN and many other international organizations such as APEC, WTO...
Viet Nam exports rice, coffee and many other farm products. Viet Nam has lots of tourist attractions and World Heritage Sites such as Ha Long Bay, Phong Nha Cave, Hoi An Ancient Town, My Son Sanctuary, etc. Vietnamese people are proud of their country. They have been trying hard to build a powerful and prosperous country.
Answer the questions:
1. Where is Viet Nam located?
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2. What is the area of Viet Nam?
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3. What does Viet Nam export?
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4. What have Vietnamese people been trying to do?
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5. Name some World Heritage Sites in Viet Nam.
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natural disaster is a major adverse event resulting from natural processes of the Earth; examples include floods, hurricanes, tornadoes, volcanic eruptions, earthquakes, tsunamis, and other geologic processes. A natural disaster can cause loss of life or property damage, and typically leaves some economic damage in its wake, the severity of which depends on the affected population’s resilience, or ability to recover and also on the infrastructure available. An adverse event will not rise to the level of a disaster if it occurs in an area without vulnerable population. In a vulnerable area, however, such as Nepal during the 2015 earthquake, an earthquake can have disastrous consequences and leave lasting damage, requiring years to repair.
Earthquakes
An earthquake is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. At the Earth’s surface, earthquakes manifest themselves by vibration, shaking and sometimes displacement of the ground. Earthquakes are caused mostly by slippage within geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. The underground point of origin of the earthquake is called the focus. The point directly above the focus on the surface is called the epicenter. Earthquakes by themselves rarely kill people or wildlife. It is usually the secondary events that they trigger, such as building collapse, fires, tsunamis (seismic sea waves) and volcanoes, which are actually die human disaster. Many of these could possibly be avoided by better construction, safety systems, early warning and planning.
What is a natural disaster?
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What are consequences of the natural disaster?
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What kind of natural disaster mentioned above happened with Nepal in 2015?
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What is the reason of an earthquake?
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What is epicenter?
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natural disaster is a major adverse event resulting from natural processes of the Earth; examples include floods, hurricanes, tornadoes, volcanic eruptions, earthquakes, tsunamis, and other geologic processes. A natural disaster can cause loss of life or property damage, and typically leaves some economic damage in its wake, the severity of which depends on the affected population’s resilience, or ability to recover and also on the infrastructure available. An adverse event will not rise to the level of a disaster if it occurs in an area without vulnerable population. In a vulnerable area, however, such as Nepal during the 2015 earthquake, an earthquake can have disastrous consequences and leave lasting damage, requiring years to repair.
Earthquakes
An earthquake is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. At the Earth’s surface, earthquakes manifest themselves by vibration, shaking and sometimes displacement of the ground. Earthquakes are caused mostly by slippage within geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. The underground point of origin of the earthquake is called the focus. The point directly above the focus on the surface is called the epicenter. Earthquakes by themselves rarely kill people or wildlife. It is usually the secondary events that they trigger, such as building collapse, fires, tsunamis (seismic sea waves) and volcanoes, which are actually die human disaster. Many of these could possibly be avoided by better construction, safety systems, early warning and planning.
What is a natural disaster?
……………………………………………………………………………………………………………………………..
What are consequences of the natural disaster?
……………………………………………………………………………………………………………………………..
What kind of natural disaster mentioned above happened with Nepal in 2015?
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What is the reason of an earthquake?
……………………………………………………………………………………………………………………………..
What is epicenter?
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1. The distance from my house to Ha Noi is over 20 kilometers.
→It’s………………………………………………………………………
2. My brother often watched TV in his free time last year, but he no longer does it.
→My brother used……………………………………
3. People in the countryside will use much biogas in the future.
→Much……………………………………………………………………
4. These flowers are Lan’s.
→These are…………………………………………………………………………