Changes around us

Which of the following changes can be reversed?

• Raw egg to boiled egg

• Wet clothes to dry clothes

• Cow dung to biogas

• none of the above

A single change can be classified under various types of changes . True or false

The gaps between rails give trains their characteristics __________ noise when their wheels run over the gaps.

great belt bridge in Denmark expands ________ m in summer.

• 5.7

• 7.4

• 4.7

• 7.5

what type of steel in used in pendulums ?

• steel

• inver steel

• inat steel

• invar steel

Do all thermometers contain liquid ?

• Yes

• No

radiator caps of vehicles that are overheated should not be opened. True or false

What type of change does candle go through ?

• physical

• chemical

• irreversible

• reversible

a disk shape metal is heated will the disk holes get larger or smaller?

What take place around us all the time?