Choose the correct one

(a)

km > mm > cm > m

(b)

km > mm > m > cm

(c)

km > m > cm > mm

(d)

km > cm > m > mm

Seeds from water-melon can be removed by ________

(a)

hand-picking

(b)

filtration

(c)

magnetic separation

(d)

decantation

Lizards breathe through their

(a)

Skin

(b)

Gills

(c)

Lungs

(d)

Trachea

Who is the father of computer?

(a)

Martin Luther King

(b)

Graham Bell

(c)

Charlie Chaplin

(d)

Charles Babbage

Electricity is produced in

(a)

transformer

(b)

power station

(c)

electric wire

(d)

television

Air pollution leading to Acid rain is a

(a)

reversible change

(b)

fast change

(c)

natural change

(d)

human made change

Nitrogen is used in the food packaging industry because it ________________

(a)

provides colour to the food

(b)

provides oxygen to the food

(c)

adds proteins and minerals to the food

(d)

keeps the food fresh

Which one of the following is not an unicellular organism?

(a)

Yeast

(b)

Amoeba

(c)

Spirogyra

(d)

Bacteria

Which one of the following is an input device?

(a)

Speaker

(b)

Keyboard

(c)

Monitor

(d)

Printer

Which of the following processes add water vapour to the atmosphere?
i. Transpiration
ii. Precipitation
iii. Condensation
iv. Evaporation

(a)

ii and iii

(b)

ii and iv

(c)

i and iv

(d)

i and ii