What is the difference between anaerobic and aerobic respiration.
Give one example of each.
b) Is a rainbow an example of spectrum? Justify.
c) What are gears? How do input & output wheels work?
d) Give reasons for the following statements:
i) Why do we see the flash of light earlier than thunder?
ii) Why the pulse is clearer in wrist than in ankles?
iii) Why muscle cells have more mitochondria than bone cells?
iv) Why our breathing rate at rest is different than when we are
exercising?
v) Why walking on pebbles with bare feet does not hurt as
much when you enter the sea.
e) Briefly mention the components of blood and their functions?
f) How balanced forces enable an object to float? Give exam
Answers
Answer:
poda
Explanation:
solla mudiyathu
Answer:1) Aerobic respiration takes place in presence of oxygen; whereas anaerobic respiration takes place in absence of oxygen. Carbon dioxide and water are the end products of aerobic respiration, while alcohol is the end product of anaerobic respiration. Aerobic respiration releases more energy than anaerobic respiration.
2 b.) The rainbow is formed by scattering of the sunlight by water droplets present in air. The sunlight is scattered into all of its different frequencies and, therefore, can be called, a continuous spectrum.
c.) l don't know.
i) The reason we see a flash of lightning before hearing thunder is because light travels faster than sound. The speed of light depends on what it is moving through - being slow in gases, fast in liquids, and even quicker in solids. In the air, sound travels at around 332 metres per second.
ii) l don't know
iii) Muscle cells need energy to do mechanical work and respond quickly. Thus a higher number of mitochondria is present so that the cells requirement of energy to perform its specific function is fulfilled.
iv) When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide. To cope with this extra demand, your breathing has to increase from about 15 times a minute (12 litres of air) when you are resting, up to about 40–60 times a minute (100 litres of air) during exercise.
v) because pebbles are round they don't have pointy edge. pebbles are soft and smooth stones. so whileyou are walking on pebbles, you feel relaxed or feel comfortable.
e.) It has four main components: plasma, red blood cells, white blood cells, and platelets. Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues. forming blood clots to prevent excess blood loss.
f.) An object floats when the weight force on the object is balanced by the upward push of the water on the object. The upwards push of the water increases with the volume of the object that is under water; it is not affected by the depth of the water or the amount of water.
hope it will help you