Tamil Nadu Primary School इयत्ता ४ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Water cycle increases the availability of _______.

Water cycle controls Earth‛s temperature.

Water becoming water vapour on heating is called evaporation.

Name the processes involved in the water cycle.

What is water cycle? Write any three importances of water cycle.

What is rain water harvesting? List out the advantages of rain water harvesting.

Colour the given picture and write the correct name in the given blanks.

(Precipitation, Evaporation, Condensation, Water storage)

Classify the following.

( Dog, Cat, coconut tree, monkey, brinjal plant, papaya plant)

Write the percentage of the gases present in air.

Air is made up of oxygen only.

Air is a mixture of many _______.

What are the components of air?

List uses of oxygen.

List out the uses of carbon dioxide.

______ present in the air is needed for respiration.

Composition of the component of air ______ from place to place.

______ is the main component of air.

The Scottish chemist ______ discovered carbon dioxide is present in air.

All living things use oxygen for breathing.

The main component of air is oxygen.