properties of gases
it has definite mass
indefinite shape
indefinite volume
so here we can say that gas have indefinite volume not definite so therefore the answer will be A
Answer:
The correct answer is -
1. photosynthesis and cellular respiration
2. glucose and cellular respiration
3. O2
4. C6H12O6
5. CO2
6. H2O
Explanation:
For the survival and growth of a plant, there are several functions and structure are essential but two most important parts are photosynthesis that provides food and glucose for the plant and its nourishment and other is cellular respiration which is required to convert glucose into ATP a form of energy.
In animals, photosynthesis is not possible so they depend on the plants and other sources for glucose and another important process for growth and survival is cellular respiration.
The chemical formula of oxygen, glucose, carbon dioxide, and water is as follow:
3. O2 - oxygen
4. C6H12O6 - glucose
5. CO2 - carbon dioxide
6. H2O - water
Answer:I believe the answer is A
Explanation:
B and C have nothing to do with how the sun helps or is a necessity. D only talks about the life span of the sun not how it is necessary for the earth. A is the only answer that makes sense because it gives examples on how the sun helps the earth as well as human kind.
Water exists as a solid at or below 0 degree Celsius.
At 0 degree Celsius, water can go through a phase change, either freezing or melting, depending whether energy is given or taken away. If the temperature is below 0, water should exist as solid as the temperature is lower than its melting point. If the temperature is right at 0 degree, the water can partially be solid and liquid at the same time, during phase change.
Therefore, water exists as solid at or below 0 degree Celsius.