Gravitation — Science STD 9 — Question

Complete the following statements:
Magnesium has 3 valence electrons in the ________ shell.

Muscular tissue : Movement :: Nervous tissue :

Fill in the following blanks with suitable words:
Newton’s first law of motion is also called Galileo’s law of ________.

Fill in the following blanks with suitable word:
A sound wave consists of places of higher pressure called _____ and places of _____ pressure called _____.

Measles : Virus :: Ringworm : …………………………. .

Fill in the following blanks in respect of an atom of an element:

No. of Protons	No. of Neutrons	Mass number	Atomic number	No. of electrons	Symbol
11	12	............	............	............	............

Fill in the following blanks with suitable word:
The weight of an object on the earth is about _______ of its weight on the moon.

Sodium: (2, 8, 1):: Chlorine:: …………………………

Fill in the following blanks with suitable words:
The slope of a distance-time graph indicates ______ of a moving body.

….……………. is the essential element in all the organic compounds.