Unit 16 : Inventions

...;-;

Bài nào?

lớp 4 em ko giúp đc :)

1. Bell started experimented with ways of transmitting speech over a long distance.

2. Mom had to do everything without the help of modern equipment.

for nhé

mình không bk có đúng không nha 

To clearly see the role of science and technology in economic growth, it is important to understand the concepts of: what is science, what is technology, between science and technology? Science is a conscious system of phenomena, things, laws of social nature and thought. The purpose of science is to search, to explain the cause of things, phenomena, processes in nature and society of thought. The content of science answers the "why" question. According to the approach from the way of organizing scientific research people divided into basic science and applied science. If science is a consciousness system, technology is a collection of methods, procedures, techniques, know-how, tools, means to convert resources into desired products and services. Technology has four elements: tools, people, information and organization. These four elements interact with one another and together carry out the production process, referring to technology, which refers to " how".

Water pollution is caused by the intentional or unintentional release of toxic chemicals/materials, contaminants and harmful compounds into various bodies of water such as rivers, lakes and the ocean.

Without proper disposal or filtration of these pollutants they can spread throughout the water and effect all living animals and organisms that come into contact with it by contaminating any living thing that requires water for survival.

In addition to harming animals water pollution can also affect plants, trees, the soil and other natural materials and resources of the earth.

If you would like to limit the amount of pollution you produce and thus help keep the oceans, rivers and lakes clean there are a number of things you can do.

Keep your car well maintained and immediately service it if you notice any oil leaking from the car
Replace your air fresheners with eco-friendly candles, incense and/or potpourri
Purchase environmentally friendly cleaning products that do not harm the land if they happen to be flushed or emptied into a drain
Reduce the amount of power you use and purchase energy saving light bulbs and appliances. This helps reduce the amount of emissions being released by utility companies and your own home products.
Conserve your water usage and don’t leave water running when you are not using it
Reduce, recycle & reuse materials that you have purchased. Plastics and papers may be sent to the recycling bin while some of your glass materials may be able to be reused or re-purposed
Make sure non recyclable waste is contained properly so that it does not spill into the land, street drain sewage drain
Purchase local food that has been grown from healthy agricultural farms that don’t use polluting fertilizers and pesticides
Purchase eco-friendly lawn fertilizers and pesticides for your own lawn in order to prevent your lawn from becoming toxic and prevent possible hazardass chemicals from entering street drains
Recycle old clothing by giving it away to shelters and non for profit re sellers. Not only does it lower the amount of garbage you produce it also allows you go give to a cause and help the community
Use a reusable grocery bag rather than the plastic bags offered at grocery stores when shopping for food to minimize your plastic waste
Eliminate unnecessary mail and have your bills sent to you by email. This helps protect the trees and reduce the amount of paper you have to dispose of later
Properly dispose of toxic chemicals rather than dropping them down the drain. You can do an online search for local toxic chemical disposal areas near you
As you can see there are a lot of things you can do to help reduce the amount of pollution you produce.

Even if you only implement a few of these strategies you could end up reducing a ton of waste and unnecessary garbage that is created in daily life.

1 Facsimile was invented by Alexander Bain

2 Ha Long Bay was recognized as one of the world's seven wonders

3 Can garbage be used to make compost?

4 Romeo and Juliet was written by Shakespeare in 1592 

5 Did the Wright brothers build the first plane in 1903?

6 Our factory doesn't produce this kine of paper

7 People have used ball point pens for many years

7 Whitcomb L.Judsin invented the zipper in 1893

1 Human beings have gained much specific advancement recently. There are a series of inventions that have brought human conveniences in a modern life.

2 Television sets as a good example that certainly influences on our life in communication and entertainment. However, TV also causes some bad effects of time-consuming and health problems.

3 In the first place, television helps people in the ways of communicating to each other and entertaining their life. Thanks to the appearance TV, people can keep up-to-date with the world.

4 What our life will be if we do not have a TV at home. Because TV is a cheap and available tool to provide us daily information.

5 Also, watching TV is a valuable kind of entertainment that helps people relax after working hard or suffering from a busy life. Last but not least, TV has changed husband’s behavior in connecting to each other.
6 Beside of good advantages of TV, watching TV may cause some disorders in health and working time as well.

7 Some people spend long hours in front of a TV set, they may neglect then work or duty in taking care of their family members. And young people may work less effectively and addicted to watching TV lead to passiveness and laziness.

 8 In conclusion, everything has two sides and TV is optional. It is obvious that TV benefits our life in making people become friendly and close. I totally agree that TV is a great invention and we have to be aware of its good points by using it suitably.

Mixture the flour with the eggs and butter.

Mixture => Mix

Mix sth with sth: Trộn cái gì đó với cái gì đó...

I think so :vvv

1, tropical

2, in

3, where

4, addition

5, are

1. My school / big/ my sister's school.

⟹ ________My school is bigger than my sister’s school_______________

2. Life in the city/ exciting/ life in the country.

⟹ ____________Life in the city is more exciting than life in the country___________

3. Lan/ visit/ Ha Long Bay/ next summer

⟹ _________Lan is going to visit Ha Long Bay next summer_____________

4. My grandfather/ old/ person/ in my family.

⟹ _______________My grandfather is the oldest person in my family_______

6. Tuan/ want/ go/ Hue / his friends/ this summer.

⟹ __________Tuan wants to go to Hue with his friends this summer___________

7.  He / listen / music / now.

 ___________He is listening to music now___________

1. My school / big/ my sister's school.

⟹ ______My school is bigger than my sister's school._________________

2. Life in the city/ exciting/ life in the country.

⟹ ____________Life in the city is more exciting than life in the country___________

3. Lan/ visit/ Ha Long Bay/ next summer

⟹ _________Lan is going to visit Ha Long Bay next summer_____________

4. My grandfather/ old/ person/ in my family.

⟹ ___My grandparent is the oldest person in my family.__