_____________is used to measure mass.

(a)

Stop clock

(b)

Beam balance

(c)

electronic balance

(d)

Graduated cylinder

A___________ is the fastest land animal

(a)

Horse

(b)

Lion

(c)

Cheetah

(d)

Tiger

Removing grains from stalks __________ method is used

(a)

Winnowing

(b)

Sieving

(c)

Churning

(d)

Threshing

Length of Nile river is_____________

(a)

6560 km

(b)

6650 km

(c)

6506 km

(d)

5606 km

____________can live for many days without drinking water.

(a)

Dog

(b)

Elephant

(c)

Cow

(d)

Camel

Any human being should take minimum ___________ of water every day.

(a)

2 liters

(b)

3 liters

(c)

8 liters

(d)

6 liters

Electromagnetic train are used for public transport only in China, Japan and South Korea.

(a)

Bus

(b)

Car

(c)

Train

(d)

Vehicles

______________ depends on water at all levels of production.

(a)

Water

(b)

Salinity

(c)

Pollutants 

(d)

Industry

Any substance that causes pollution is known as a _________________ 

(a)

pollution

(b)

pollutant

(c)

abiotic factors

(d)

biotic factors

_______________ is a device comprising both hardware and software.

(a)

Computer

(b)

Hardware

(c)

Software

(d)

Operatirig system