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If you add oxygen and hydrogen in one time, what is this form like a liquid thing?
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dịch :
Nếu bạn thêm oxi và hiđro vào cùng một lúc thì chất lỏng này sẽ có dạng như thế nào?
cái này là hóa học lớp 6 mà mik ko trả lời đc
/HT\
TL :
Nếu bạn thêm oxi và hiđro vào cùng một lúc thì chất lỏng này sẽ có dạng như thế nào ?
Cái này hoá học lớp 6 nha .
Học tốt . Cho mình 1 tíc nha .
X Read the passage. Answer the questions below.
Scientists have discovered that the ozone layer is getting thinner. Some predict that the sun’s rays will cause a sharp increase in deaths from skin cancer over the next fifty years. These harmful rays can also damage the eyes, create wrinkles, and cause other health problems.
The stratosphere contains a form of oxygen called ozone. Ozone is a molecule composed of three oxygen atoms. The chemical formula of ozone is 03. Oxygen molecules make up...
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X Read the passage. Answer the questions below.
Scientists have discovered that the ozone layer is getting thinner. Some predict that the sun’s rays will cause a sharp increase in deaths from skin cancer over the next fifty years. These harmful rays can also damage the eyes, create wrinkles, and cause other health problems.The stratosphere contains a form of oxygen called ozone. Ozone is a molecule composed of three oxygen atoms. The chemical formula of ozone is 03. Oxygen molecules make up about 21% of all gases in the Earth’s atmosphere. They consist of two atoms of oxygen and are labeled 02. Most ozone found in our atmosphere is formed by an interaction between oxygen molecules and ultraviolet radiation (UV) from the sun. When ultraviolet radiation hits an oxygen molecule, it may cause the molecule to break apart into single atoms of oxygen. These single atoms are very reactive, and a single oxygen atom can combine with a molecule of oxygen to form ozone.
1.What do people say about the rate of deaths from skin cancer in the future?
2. How many oxygen atoms are there in a molecule?
3.What elements participate in the formation process of ozone?
4.What happens when an oxygen molecule and an ultraviolet radiation hit each other?
5.What is the feature of single atoms?
X Read the passage. Answer the questions below.
Scientists have discovered that the ozone layer is getting thinner. Some predict that the sun’s rays will cause a sharp increase in deaths from skin cancer over the next fifty years. These harmful rays can also damage the eyes, create wrinkles, and cause other health problems.
The stratosphere contains a form of oxygen called ozone. Ozone is a molecule composed of three oxygen atoms. The chemical formula of ozone is 03. Oxygen molecules make up about 21% of all gases in the Earth’s atmosphere. They consist of two atoms of oxygen and are labeled 02. Most ozone found in our atmosphere is formed by an interaction between oxygen molecules and ultraviolet radiation (UV) from the sun. When ultraviolet radiation hits an oxygen molecule, it may cause the molecule to break apart into single atoms of oxygen. These single atoms are very reactive, and a single oxygen atom can combine with a molecule of oxygen to form ozone.
1.What do people say about the rate of deaths from skin cancer in the future?
=> Some predict that the sun’s rays will cause a sharp increase in deaths from skin cancer over the next fifty years. These harmful rays can also damage the eyes, create wrinkles, and cause other health problems.
2. How many oxygen atoms are there in a molecule?
=> Oxygen molecules make up about 21% of all gases in the Earth’s atmosphere
3.What elements participate in the formation process of ozone?
=> Most ozone found in our atmosphere is formed by an interaction between oxygen molecules and ultraviolet radiation (UV) from the sun.
4.What happens when an oxygen molecule and an ultraviolet radiation hit each other?
=> When ultraviolet radiation hits an oxygen molecule, it may cause the molecule to break apart into single atoms of oxygen
5.What is the feature of single atoms?
=> These single atoms are very reactive, and a single oxygen atom can combine with a molecule of oxygen to form ozone.
I. Reorder the sentences1. like/ What/ Seven Dwarfs/ are/ like?2. books/ are/ reading/ What/ you/ ?3. in/ your/ What/ do/ free/ you/ time/ do/ ?4. The/ is/ called/ main/ a schoolboy/ character/ Kudo.5. She / and/ is/ The/ reading/ Crow/ Fox.6. He/ stays/ and/ home/ comic books/ at/ read/ often.7. very/ because/ I/ him/ he/ clever/ like/ much/ is/ and brave.8. story/ I/ reading/ am/ Cinderella/ the.9. in/ reading/ fairy tales/ her/ She/ time/ likes/ free.10...
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I. Reorder the sentences
1. like/ What/ Seven Dwarfs/ are/ like?
2. books/ are/ reading/ What/ you/ ?
3. in/ your/ What/ do/ free/ you/ time/ do/ ?
4. The/ is/ called/ main/ a schoolboy/ character/ Kudo.
5. She / and/ is/ The/ reading/ Crow/ Fox.
6. He/ stays/ and/ home/ comic books/ at/ read/ often.
7. very/ because/ I/ him/ he/ clever/ like/ much/ is/ and brave.
8. story/ I/ reading/ am/ Cinderella/ the.
9. in/ reading/ fairy tales/ her/ She/ time/ likes/ free.
10. it/ when/ can/ finish/ You/ it/ have/ I
I. Reorder the sentences
1. like/ What/ Seven Dwarfs/ are/ like? What are Seven Dwarfs like?
2. books/ are/ reading/ What/ you/ ? What books are you reading?
3. in/ your/ What/ do/ free/ you/ time/ do/ ?
What do you do in your free time?
4. The/ is/ called/ main/ a schoolboy/ character/ Kudo.
The main character is a schoolboy called Kudo.
5. She / and/ is/ The/ reading/ Crow/ Fox.
She is reading The Crow and Fox
6. He/ stays/ and/ home/ comic books/ at/ read/ often.
He often stays at home and reads comic books
7. very/ because/ I/ him/ he/ clever/ like/ much/ is/ and brave.
I like him very much because he is clever and brave
8. story/ I/ reading/ am/ Cinderella/ the.
I am reading the Cinderella story
9. in/ reading/ fairy tales/ her/ She/ time/ likes/ free.
She likes reading fairy tales in her free time
10. it/ when/ can/ finish/ You/ it/ have/ I
You can have it when I finish it
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1.The life in the countryside makes us relaxed because it is very..............(peace)
2. She called him about her furniture..........(deliver)
3. You should do your test.....if you want to get good marks (care)
4.There was still no ............ On what to do next (agree)
5. Bell and Thomas Watson started experimenting the way of................speech over a long distance (transmit)
6. This river is very............ For swimmers (danger)
7.this old man is...........in one ear (deafen)
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1.The life in the countryside makes us relaxed because it is very..............(peace)
2. She called him about her furniture..........(deliver) 3. You should do your test.....if you want to get good marks (care) 4.There was still no ............ On what to do next (agree) 5. Bell and Thomas Watson started experimenting the way of................speech over a long distance (transmit) 6. This river is very............ For swimmers (danger) 7.this old man is...........in one ear (deafen)
1.The life in the countryside makes us relaxed because it is very.......peaceful.......(peace)
2. She called him about her furniture...delivery.......(deliver)
3. You should do your test..carefully...if you want to get good marks (care)
4.There was still no .......agreement..... On what to do next (agree)
5. Bell and Thomas Watson started experimenting the way of........transmitting........speech over a long distance (transmit)
6. This river is very....dangerous........ For swimmers (danger)
7.this old man is.....deaf......in one ear (deafen)
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5, 6 and 7 are three consecutive numbers.
5+6+7=18, which is divisible by 3.
when you add any three consecutive number, total is divisible by 3.
a) is this always, sometimes, never true?
b) what if you add four cosnecutive number?
bn nào thông minh giúp mk nhé mk tặng 1 lik-e
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. PHOTOSYNTHESISAlmost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the suns energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of...
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
PHOTOSYNTHESIS
Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.
Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.
In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.
Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.
Advances in Photosynthesis and Respiration, Hardback.1990.
What can be inferred about algae?
A. Green algae are less common than other colors of algae.
B. Algae are photosynthetic organisms.
C. They are chemically different from other plants.
D. They are ineffective producers of sugars.
Kiến thức: Đọc hiểu
Giải thích:
Những gì có thể được suy luận về tảo?
A. Tảo xanh ít phổ biến hơn các màu khác của tảo.
B. Tảo là sinh vật quang hợp.
C. Chúng khác nhau về mặt hóa học so với các cây khác.
D. Chúng là những nhà sản xuất đường không hiệu quả.
Thông tin: In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose.
Tạm dịch: Trong một quá trình gọi là quang hợp, thực vật, tảo và một số sinh vật khác thu năng lượng của mặt trời và sử dụng nó để tạo ra các loại đường đơn giản như glucose.
Chọn B
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The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity th...
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The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity that is moving very rapidly. It may be moving between a cloud and the ground, between two clouds, or between two parts of the same cloud. The lightning heats the air around it. This hot air expands, or get bigger, and it causes the air to move in waves. The air waves pass you in a series, one after another. For this reason, you may hear many rumbles and not just one sound.
____ 29/ Lightning may move between a cloud and the ground.
____ 30/ Thunder is a very bright light in a thunderstorm.
____ 31/ When you hear thunder you may hear a series of loud sounds and not one
big sound. This is because the air waves pass one after another.
____ 32/ Lightning always moves rapidly.
The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity that is moving very rapidly. It may be moving between a cloud and the ground, between two clouds, or between two parts of the same cloud. The lightning heats the air around it. This hot air expands, or get bigger, and it causes the air to move in waves. The air waves pass you in a series, one after another. For this reason, you may hear many rumbles and not just one sound.
__T__ 29/ Lightning may move between a cloud and the ground.
__F__ 30/ Thunder is a very bright light in a thunderstorm.
__T__ 31/ When you hear thunder you may hear a series of loud sounds and not one
big sound. This is because the air waves pass one after another.
__T__ 32/ Lightning always moves rapidly.
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Writing a paragraph about your favourite subject: English
-Why do you like this subject?
-How often do you have this subject?
-How much time do you spend on this subject a day?
-Do you have any difficulties in learning it? Why? If yes, how do you improve them?
-What do you think about it? Is it interesting? or educational????
I love a lot of subjects, but there is the only one subject I the most. It's absolutely English. English helps me a lot. For example, when I go to another countries, I can talk with the foreigns by English, I don't have to worry anything 'bout my language anymore. So, I always spend 2 hours to prace and study this subject at home every evening. And I can learn English at school three time a week, too. The special thing of this subject is there are thousands or may be millions of difficult words I've ever seen before. It makes me feel interesting about English. It's really really great if you know all of the English word, right? But it's also very difficult to perform, so to improve your English vocabulary, there's only one way, patient and keep prace memorize the words. Not lucky, it's the best way! However, I always love this subject because it also helps me to improve my personality - patient!!!
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câu 1
- Because it'sgood for me / hoặc theo ý bạn
-Yes, i often learn this subject
-i give my subjecct các thứ
what the matter with you?
i have.................................
don't.....................................!
ok, i won' t
what do you do in your free time ?
i.........................................................
what happenerd in the story?
First,
Then,
Next,
In the end,
Tìm và chữa lỗi
1, He let the letter falling on to the floor
2, What do you use to do felt
3, Lan wish she can buy a car
4, This is the first time she forgot to give me a message
5, we reached the nearest village after walk for five hours
6,if i will have to make a difficult decision ,i will discuss it with my parent
7,what about use pulic buses instead of motobikes
8,if you called me i will explain the home work to you
9,if i have a car i would drive it to work
10,my father disli...
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Tìm và chữa lỗi
1, He let the letter falling on to the floor
2, What do you use to do felt
3, Lan wish she can buy a car
4, This is the first time she forgot to give me a message
5, we reached the nearest village after walk for five hours
6,if i will have to make a difficult decision ,i will discuss it with my parent
7,what about use pulic buses instead of motobikes
8,if you called me i will explain the home work to you
9,if i have a car i would drive it to work
10,my father dislikes to play volleyball in evening
11,she promises talking me to zoo with her next sunday
12,when we look out of the window ,we saw him
13,i heaven't heard from maria since a long time
14,she wishes she is the most beautiful girl in the world
15, he has waited for you for 9o'clock this morning
Tìm và chữa lỗi
1, He let the letter falling ->fall on to the floor
2, What do > did you use to do felt
3, Lan wish she can - >could buy a car
4, This is the first time she forgot -> has forgotten to give me a message
5, we reached the nearest village after walk -> walking for five hours
6,if i will -> bỏ have to make a difficult decision ,i will discuss it with my parent
7,what about use -> using pulic buses instead of motobikes
8,if you called -> call me i will explain the home work to you
9,if i have -> had a car i would drive it to work
10,my father dislikes to play -> playing volleyball in evening
11,she promises talking -> to take me to zoo with her next sunday
12,when we look -> looked out of the window ,we saw him
13,i heaven't heard from maria since -> for a long time
14,she wishes she is -> were the most beautiful girl in the world
15, he has waited for you for -> since 9o'clock this morning
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