The atmosphere has 4 layers: the troposphere that we live in near the surface of the earth; the stratosphere that houses the ozone layer; the mesosphere, a colder and lower density layer with about 0.1% of the atmosphere; and the thermosphere, the top layer, where the air is hot but very thin.
Answer:
Option D, 63 cm
Explanation:
The scale of model is of local park is 
This means that each dimension of the model is 21 times smaller than the actual park (to be developed in future)
Given -
Depth of the pond
centi meter
Depth of the real pond will be 21 times of the depth of the model.
Thus , real pond's depth is equal to
cm
Hence, option D is correct
Answer:
false I think
Explanation:
if it were to be true every insect would walk on water? but they cant so it has to be false