Questions

1. Differentiate between:

• ˆ Heat and Temperature
• Conductors and Insulators

 

 2.  Compare

• Compare: Conduction, Convection, Radiation

 

3. Explain

• How ventilation is provided in rooms?
• Why the freezer compartment of a refrigerator is always kept in its upper portion?
• Why two loosely fitted garments are warmer them one heavy garment?
• During day time, why is it colder in shade?
• In this arrangement water in the paper pan kept on wise mesh is heated. Water boils but paper does not catch fire.

 

 4.  Give Reasons

•  Buffaloes enjoy a dip in river or in lake on a hot summer afternoon
•  On a cold day, the metal door handles is felt colder than the wooden door
• A blanket wrapped around your body in winter keeps it warm but when wrapped around an ice block prevents it from melting.