ICSE ICSE Class 7 - CISCE Question Bank Solutions

Write whether the following statement are true or false.

There is no difference between evaporation and boiling.

Give reasons 

Magnesium is used in fire works. 

Give reasons  

Aluminium is used in making aircrafts.  

Write whether the following statement are true or false.

All solids, on heating, first change to the liquid and then to the gaseous state always.

Give reasons 

Graphite is used in the leads of pencils  

Write whether the following statement are true or false.

A gas has no free surface.

Give reasons 

Gold is mixed with copper and nickel.  

Write true or false for each statement. Rewrite the false statement correctly.

 Solids and liquids can flow.

Write true or false for each statement. Rewrite the false statement correctly.

Solids can be compressed easily.

Write true or false for each statement. Rewrite the false statement correctly.

The smallest part of an element capable of independent existence is called an atom.

Write true or false for each statement. Rewrite the false statement correctly.

The intermolecular space in a gas is almost negligible.

For the following statements, say whether it describes a solid, a liquid or a gas.
Particles move about very quickly.

For the following statements, say whether it describes a solid, a liquid or a gas.

Particles are quite close together

For the following statements, say whether it describes a solid, a liquid or a gas.

Particles are far apart and move in all directions 

Give two uses of Germanium  

Fill in the blank 

_______ is a soft metal. 

Name the phenomenon which causes the Formation of water vapour from water is 

Fill in the blank 

A metal that gives dazzling effect to crackers when they explode is ______

Name the phenomenon which causes the Disappearance of camphor is

Name the phenomenon which causes the Conversion of ice into water is