Choose the correct one

(a)

km > mm > cm > m

(b)

km > mm > m > cm

(c)

km > m > cm > mm

(d)

km > cm > m > mm

The correct relation among the following is 

(a)

Speed = distance × time

(b)

Speed = distance / time

(c)

Speed = time / distance

(d)

Speed = 1 / (distance × time)

_________is essential to perform winnowing activity.

(a)

Rain

(b)

Soil

(c)

Water

(d)

Air

The habitat of water hyacinth is

(a)

Aquatic

(b)

Terrestrial

(c)

Desert

(d)

Mountain

Paramecium moves from one place to other with the help of______

(a)

Pseudopodia

(b)

Flagella

(c)

Foot

(d)

Cilia

We should include fruits and vegetables in our diet, because _______.

(a)

They are the best source of Carbohydrates

(b)

They are the best source of Proteins

(c)

They are rich in minerals and Vitamins

(d)

They have high water content

Who is the computer’s first programmer?

(a)

Lady Wellington

(b)

Augusta ado Lovelace

(c)

Mary Curie

(d)

Mary Comb

One litre of water at 30^o C is mixed with one litre of water at 50^o C. The temperature of the mixture will be

(a)

80^o C

(b)

More than 50°C but less than 80^o C

(c)

20^o C

(d)

around 40^o C

__________ is a good conductor

(a)

silver

(b)

wood

(c)

rubber

(d)

plastic

Out of the following an example of a desirable change is

(a)

rusting

(b)

change of seasons

(c)

earthquake

(d)

flooding

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

Breakdown of food into smaller molecules in our body is known as

(a)

Muscle contraction

(b)

Respiration

(c)

Digestion

(d)

Excretion

Which one of the following is an example for wireless connections

(a)

Wi-Fi

(b)

Electric wires

(c)

VGA

(d)

USB

Magnets lose their properties when they are

(a)

used

(b)

stored

(c)

hit with a hammer

(d)

cleaned