Health: The Ultimate Treasure — Science STD 8 — Question

Which of the following is not a planet?

An electric lamp glows due to:

Richter scale measures the strength of earthquakes

Richter scale measurement of the earthquake	Example of damages due to the earthquake
3.0-3.9	No damages but some vibrations felt
4.0-4.9	Cracks in windows, some unstable objects fall
5.0-5.9	Building walls may collapse. movement of furniture
6.0-6.9	Building roofs may collapse. loss of few lives
7.0-79	Cracks on ground, underground pipes broken, loss of many lives

(i) The damages from an earthquake are listed below.
2 people died
5 building roofs collapsed
12 building walls collapsed
What could be the likely reading on the richter scale for the earthquake?
(a) 4.8
(b) 5.4
(c) 6.5
(d) 7.3
(ii) Which of these statements is true about earthquake?
(a) Earthquakes can cause soil erosion.
(b) Most of the earthquakes occur in mountain regions.
(c) The location and duration of earthquakes can be predicted.
(d) Earthquakes are caused by the movement of underground plates.

When a glass rod is rubbed with a silk cloth, then the charge on the silk cloth is:

Which of the following hormone prepares our body for action in emergency situations?

Which of the following is not obtained as a fraction during the refining of petroleum?

Read the given statements and select the correct option.
Statement 1: A beam of light emitted by the point source placed in water always diverges in air.
Statement 2: The refracted ray moves away from normal when a ray goes from a denser medium to a rarer medium.

When a plastic comb is rubbed with dry hair, the hair get positively charged by friction. In this porcess: