VI Write the differences between the following
1. Rotation and revolution
2. Soluble substances and Insoluble substances
VII Give reasons
1. Petrol and kerosene should be stored away from any source of heat.
2. The upper surface of a leaf is greener than its lower surface.
Answers
Explanation:
1. Rotation refers to an object's spinning on its own axes. whereas Revolution refers the object's orbital motion around another object.
2. soluble substances are those substances which are soluble in water like sugar and insoluble substances are those substances which are not soluble in water like rock etc.
3.Petrol and Kerosene should be stored away from any source of heat because they are very reactive and they can react with with heat and can cause burning.
4. The upper surface of leaf is greener then it's lower surfaces because of the presence of more amount of chlorophyll on the leaf upper surface then it's lower surface.
Answer:
refer the explanation (-:
Explanation:
In rotation a continuously spin through a axis at a same point, where it is not necessary that body will displace it self but on the other hand In revolution the body will displace it self.
eg...
a globe rotates through a axis
where as earth revolve around the sun
petrol and kerosene are combustible substance therefore there stored away from fire.
because of the presence of mesophyll cells which contains chlorophyll. Due to more amount of chlorophyll on the upper surface more light energy is trapped hence more amount light of green wavelength is reflected