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The answers are on page 12, 13 and 14 of the second volume of the second volume,
I handed them in. Just check the library. There should be some
Unit 2 section 6 answers to the cycle of aerobic carbon in nature
6：ADDCCB
7: Respiration and Photosynthesis of biological respiration substances
8: Oxygen and carbon dioxide
9: Photo carbon dioxide water organic matter oxygen
10: Many
11~12：BB
13: (1) biological respiration, material combustion and afforestation
(2) Plant photosynthesis
(3) Paper is made of trees, and trees can use carbon dioxide for photosynthesis. If you don't use paper on both sides, trees will use more, which will increase the greenhouse effect
14: Students' breathing consumes oxygen and produces carbon dioxide. If the classroom is closed and the concentration of carbon dioxide in the room increases, it will make people dizzy and other phenomena. Even if the oxygen in the room is supplemented by opening the window for ventilation, it will be more beneficial to students' learning
15: (1) yes
(2) Yes
(3) 3O2 = (energized) 2O3
(4) The use and production of chemicals containing Freon are prohibited
What are the words for water
Words with the meaning of water in the name
River, river, lake, sea, ocean, snow, rain, spring, stream, soup, wine, tea, milk, tide and tide
What is the meaning of water
Miao
What are the words with the meaning of water
Besides "Miao", there are also "Yong", "Li", "Tai", "Xing", "Quan" and "Ying" which can be used as names. In fact, the five elements belong to water, and it is not necessary to have the words beside "water". The three points of water in "Jiang", "he", "Hu" and "Hai" all contain "water", In addition, you can use the "five stroke input method" to find some words with the side of "water". I don't know whether the answer is right? Pei (unlimited vitality) is flying in the sky, to serve the world Pei Gan (clear) Zhan Zhan Lu Si, bandit Yang Bu Xi. Tired of drinking at night, You can travel to the North Bank of the Yangtze River, and you can stay in Xiaoxiang at night. Besides, there are also: cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cool, cold, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, etc, etc, etc, other other other than the net, which has been reduced to the world of the world, the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world of the world I think the names "Lingxiao", "Fuqi" and "Yupei" are OK. Are you satisfied
Which words have the meaning of "water" or "water"?
Used to change names
It's from the school of learning Chinese characters, which means it must be~
Zhan: the moral is water, wood and Tsinghua
Ji, Fei, Lin, Luo: it means water of rain and dew
What are the words that mean water?
Source, flow, sea, river, river, Qin, ice
I hope my answer can help you,
The density of water is 1.0 × 103 kg / m3______ Its physical meaning is______ ．
Density describes the mass of a substance per unit volume. To be specific, first the unit volume and then the mass. The density of water is 1.0 × 103kg / m3, which means 1.0 × 103kg / m3. Its physical meaning is that the mass of a cubic meter of water is 1.0 × 103kg. So the answer is: 1.0 × 103kg / m3; the mass of a cubic meter of water is 1.0 × 103kg
Help to do some science problems (Grade 5)
1、 In ancient China, "Geng" was used to count the time of the night, and the night was divided into five gengs. The length of each Geng depended on the length of the night
3. Because gasoline is inflammable, gasoline sold at gas stations can only be stored in special oil storage tanks instead of Coke bottles
2、 Small production: make a few pieces of colored ice
Many plant fruits and leaves contain natural pigments, such as ginger, orange juice is yellow, mulberry juice is purple red, watermelon juice, tomato juice is red, green vegetable leaf juice and green pepper juice is green
Now let's take some plant juices and use these natural "pigments" to make some colored ice cubes!
Ingredients: 1 watermelon, 1 spoon, 1 bowl, 1 mould for making ice, 1 cup of cold boiled water
(1) Take a number of watermelon pulp, mash with a spoon, extract juice
(2) Pour the extracted juice into the special mould for making ice cubes and freeze in the refrigerator
Think about it. Can you collect more natural plant pigments in other ways?
1、 1. (×) 2. (×) 3. (√)
2、 Use a beaker to fill an appropriate amount of alcohol (that is, alcohol), put a leaf (or more pieces) into it, and heat it with an alcohol lamp. Chlorophyll can dissolve in alcohol, and alcohol is easy to evaporate. After heating for a long time, you will find that alcohol turns green. When alcohol evaporates, you can get chlorophyll
Some fifth grade science problems
1. What part of the body does a fish use to move?
2. How do fish react when they feel in danger?
3. What part of the body do earthworms use for their activities?
4. How do earthworms react when they feel in danger?
5. When people use the solar energy, they also faint a lot of problems, such as: the sunlight is very scattered, how can we focus them? In a day, the sun's light constantly changes direction, how to do?
(1) The idea of "concentrating sunlight"
(2) The assumption of solving the problem of "the light of the sun constantly changes direction"
6. What are the materials of ballpoint pen, desk and classroom window?
7. For our health, in addition to strengthening exercise and scientific diet, what else should we do?
There are quite a lot of questions. You can not answer all of them. You can also answer part of them. Try to answer all of them,
One tail, swim immediately, body, dig into the earth
2. Concave mirror / convex lens
Plastic, wood, aluminum and glass
Enough sleep, good mood, etc
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