Surrounding of a living thing is called a/an _________.

_________ are the starting point of food chain.

Hibernation means________

The spines are modified ____________

Natural home of an organism where it lives and reproduces is called its_______

Food chains interconnect with each other and form_______.

Small openings in the bark of a tree are called as ________.

The process by which prepared food is transported from leaves to other parts of plant is called_________

_________ lowers down the rate of transpiration.

The process by which water is lost from the leaves is called___________.

The tissue which is responsible for the transportation of food in the plant is called___________.

Plants slows down rate of transpiration by___________.

The process by which root hairs take up water from the soil is called____________.

Small openings on underside of leaves are called _______.

Catalyst used in the formation of margarine is_________.

Which of the following is not an ingredient of bricks?

Most chemical changes are_________.

________ can make crops grow better.

Many molecules of ethylene linked together to form________.

Fe +S → _______.

Cooking of food is an example of a/an _________ reaction.

________ can flow easily but cannot diffuse.

Compounds of Carbon and Hydrogen are called as________.

____________ reactions give out heat.

Metals are good ___________.

________ have very less density.

______ is an instrument which is used for the measurement of voltage across a circuit.

Unit for measuring electric current is _______

An electric current is a flow of _________.

To vary the brightness of a bulb in a circuit ,we could use ________

A reflected sound is called a/an__________

Identify the material through which sound cannot travel.

The approximate decibel level for normal conversation is___________.

Which part of your body is made to vibrate by sound waves?

The speed of sound in air is about__________.