Question

1)Difference between milk teeth and permanent teeth.
2) Difference between troposphere and Stratosphere.

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Answer 1

1.As humans, we have two sets of teeth that erupt during our lifetime – the first set is called as milk teeth, primary teeth or baby teeth and they start erupting when we are 6 months old and the next set of teeth, called permanent teeth, begin erupting as we turn 6 years old.

2.The troposphere is the lowest level of the atmosphere, so it is in contact with the Earth's surface. In contrast, the stratosphere is located above the troposphere, so it is not in contact with the Earth's surface. ... The air density and air pressure are much lower in the stratosphere.

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Answer 2

$\textbf{\underline{Differentiation \ between}} :$

$\textbf{1) Milk \ teeth \ and \ Permanent \ teeth} :$

$\textbf{ \underline{Answer} } :$ We have two sets of teeth that erupt during our lifetime – the first set is called as milk teeth, primary teeth or baby teeth and they start erupting when we are 6 months old and the next set of teeth, called permanent teeth, begin erupting as we turn 6 years old.

$\textbf{2) Troposphere \ and \ stratosphere} :$

$\textbf{\underline{Answer}} :$   The stratosphere is a very calm & stable layer unlike the troposphere, which is a turbulent layer. This layer is calm and stable because of the absence of any vertical air currents. The reason for this is that the vertical air current flows from the warmer (lower ) layer to the colder (upper) layer.

$\textbf{Hope \ it \ helps\ !!}$