please please please do fast
Answers
Answer:
1)There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.
2)It gives them an opportunity to move greater distances across the soil surface than they could do through soil
3)Mountaineers carry an oxygen cylinder along with them. It is because when they climb mountains, as altitude increases, the amount of oxygen level in the atmospheric air decreases as trees are not found at higher altitudes. As a result, mountaineers suffer from dizziness. It can also lead to hypoxia
4)a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances is called respiration.
hope it helps.
Answer:
1)Activity: Take a candle and fix it on a table. The candle is lighted. The candle will continue to burn due to continuously available fresh air providing the required oxygen for combustion.
Now cover the burning candle by putting an inverted gas jar over it. After a short time, the candle stops burning and gets extinguished. When the burning candle is covered with gas jar, then the candle takes away the oxygen necessary for burning from the air enclosed in the gas jar. After some time, when all the oxygen of air inside the gas jar is used up, then the burning candle gets extinguished. This proves that air is necessary for combustion of substances.
2)Soil experts now think earthworms surface during rain storms for migration purposes. "It gives them an opportunity to move greater distances across the soil surface than they could do through soil," said Dr. Lowe. "They cannot do this when it is dry because of their moisture requirements."
3)Mountaineers carry an oxygen cylinder along with them. It is because when they climb mountains, as altitude increases, the amount of oxygen level in the atmospheric air decreases as trees are not found at higher altitudes. As a result, mountaineers suffer from dizziness. It can also lead to hypoxia.
4)a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances is cal;ed respiration.
5)This phenomenon is known as condensation. Cold water inside the water tries to cool down The water vapor in air which comes in contact with wall of glass and due to low temperature the vapor liquid and appears as water droplets on the outside of glass.
PLs mark me brainliest