One astronomical unit is the average distance between which of the following?

Which of the following Scientist proved that the path of each planet around the Sun is elliptical?

Which of the following planet is farthest from Sun?

What is the total number of planets move around the Sun?

Which of the following crop/s is/are affected by the 'early blight' disease?
1.Carrot
2.Potato
3.Rice
4.Tomato Select the correct answer from the following:

Which of these statements are correct regarding the atmosphere of the earth:
1. It is enveloping the earth because of gravity.
2. Its density decreases with increasing height from the surface of the earth.
3. Its characteristic composition is same throughout its height.
4. Amount of pressure it exerts on earth's surface at sea level is called one atm sphere.

Which are of the following is wrongly characterised?

When the wind is deflected due to the rotation of the Earth, it is called as ________ 

The innermost layer is the core with a radius of about ________ km.

The absence of which among the following causes the temperature of the atmosphere to decrease with ascent along with decreasing density of air?
I. Vegetation
II. Water
III. Carbon dioxide
IV. Oxygen
V. Nitrogen