Download App

Force and Pressure — Science STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8ScienceForce and Pressure5 Marks
Question
What is meant by atmospheric pressure?
✓

Answer

The earth is surrounded by air from all sides. This layer of air is called the atmosphere. Its density is high up to about 16 km from the earth’s surface. Beyond that, up to about 400 km, its density is very low. Air, due to its weight, exerts pressure on the surface of the earth.

The pressure exerted by air or the atmosphere surrounding the earth is known as the atmospheric pressure. It is the ratio of the weight of the air to the area of the surface of the earth. It decreases with altitude as the density of air decreases with altitude and also the weight of the air column above a given place.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following question." from Force and Pressure→Force and Pressure — all question types→Science STD 8 question papers→Maharashtra Board STD 8 question papers→Maharashtra Board question paper generator→

Similar questions

A force of 1000 N is applied over an area $50 cm \times 20 cm$. Find the corresponding pressure.
→
What are the different ways to extinguish fire? Write briefly about them.
→
What will be the effects on biotic factors in the running water of river?
→
State the colour change for each of the following solutions with red litmus, blue litmus, phenolphthalein and methyl orange solutions.
→
Describe the effects of soil pollution.
→
Explain the effect of following materials on environment and human health.
1. Plastic
2. Glass.
3. Thermocol.
→
Give two examples of each of water, soil and air pollution from your residential area.
→
Measure the length, breadth, height and mass of a rectangular tiffin box. Find the weight of the box and calculate the pressure in two different positions as in Ex. (1) above.
→
What is meant by subatomic particle? Give brief information of three subatomic particles with reference to electrical charge, mass and location.
→
Think – Why?

1.Some people feel their ears popping at the top of a mountain.

2.Some people feel breathless as they climb higher and higher on a mountain.

3.We can enjoy a cold-drink or fruit juice with the help of a straw but can we imagine drinking a cold-drink or fruit juice on the moon using a straw?

4.People are often advised not to carry fountain pens while travelling by air.

→