Which of the following is a derived quantity?

(a)

mass

(b)

time

(c)

area

(d)

length

A particle is moving in a circular path of radius r. The displacement after half a circle would be _______.

(a)

Zero

(b)

R

(c)

2 r

(d)

r / 2

What is one way you might increase the stability of an object?

(a)

lower the centre of gravity

(b)

raise the centre of gravity

(c)

increase the height of the object

(d)

shorten the base of the object

The graphite refill used is pencil is made of element called ___________

(a)

graphit

(b)

carbon

(c)

silicon

(d)

sodium

The sub-atomic particle which revolves around the nucleus is _______.

(a)

Atom

(b)

Neutron

(c)

Electron

(d)

Proton

Electron was discovered by ___________

(a)

J.J. Thomson

(b)

Chadwick

(c)

Goldstein

(d)

Delton

____________ do not produce spores.

(a)

Algae

(b)

Fungi

(c)

Datura

(d)

Ferns

Which technology shows the computer-drawn pictures as real picture?

(a)

Inkscape

(b)

Photo Story

(c)

Virtual Reality

(d)

Adobe Illustrator

_____________ is a good example for "Visual communication Device".

(a)

Computer

(b)

Cinema

(c)

Balckboard

(d)

Audio - visuals

We can collect our notes in ___________ application.

(a)

Notepad

(b)

Notebook

(c)

'paint' app

(d)

scratch

The materials with lower density are called _________

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rarer

Elements are the________ form of pure substances.

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simplest

The first letter of a symbol of an element is always written as a__________ letter and the second letter as a _________ letter

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capital, small

If the valency of carbon is 4 and that of hydrogen is 1, then the molecular formula of methane is_______.

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CH₄

____________ compared an atom to a watermelon.

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J.J. Thomson

A substance which contains less number of molecules per unit volume is said to be denser.

(a) True

(b) False

Metals are usually solids or gases at room temperature.

(a) True

(b) False

Sodium chloride is used as table salt and for flavoring and preserving food.

(a) True

(b) False

Latin name of Copper is cuprum.

(a) True

(b) False

The transfer of pollen to the stigma is known as pollination.

(a) True

(b) False

Area

(1)

hard and shiny

Area

(2)

π x r²

Circle

(3)

m²

Metals

(4)

plane figures

Heart attack

(5)

smoking