How does conduction occur in solids?
  • Through the transfer of sound waves
  • By the movement of electrons within the material
  • Through the transfer of light energy
  • Through the transfer of heat energy from one particle to another within the material.
A wooden spoon is dipped in a cup of ice cream. Its other end:
  • becomes cold by the process of conduction.
  • becomes cold by the process of convection.
  • does not become cold.
  • becomes cold by the process of radiation.
Heat is:
  • None of these.
  • Sometimes energy and sometimes matter.
  • A type of matter.
  • A form of energy.
A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep warm because:
  • air trapped between the layers of newspaper is a bad conductor of heat.
  • newspaper is a conductor of heat.
  • friction between the layers of newspaper produces heat.
  • newspaper is at a higher temperature than the surrounding.
The heat reaches us from the sun in the form of:
  • Conduction
  • All of these methods
  • Radiation
  • Convection
The movement of cooler air from the sea to the land is called:
  • Land breeze
  • Infiltration
  • Water cycle
  • Sea breeze
A marble tile feels colder than a wooden tile on a winter morning because:
  • is a poor conductor of heat than the wooden tile.
  • reflects more heat than wooden tile.
  • is polished while wooden tile is not polished.
  • is a better conductor of heat than the wooden tile.
Which material allows water to seep through most easily?
  • Sand
  • Gravel
  • Clay
  • Rock
What limits infiltration in urban areas?
  • Sandy soil
  • Open spaces
  • Concrete surfaces
  • Rainfall
Which material allows water to seep through most slowly?
  • Gravel
  • Sand
  • Rock
  • Clay
Assertion: Radiation is a method of transfer of heat. Reason: The process of heat transfer that does not require any medium is called convection.
  • Both A and R are true and R is the correct explanation of A.
  • Both A and R are true but R is not the correct explanation of A.
  • A is false but R is true.
  • A is true but R is false.
Assertion: Evaporation is a process where water changes into vapour and rises into the atmosphere. Reason: Evaporation requires heat energy from the Sun or other sources.
  • Both A and R are true and R is the correct explanation of A.
  • Both A and R are true but R is not the correct explanation of A.
  • A is false but R is true.
  • A is true but R is false.
Assertion: Sea breeze refers to the movement of cold air from sea towards land during daytime. Reason: Land breeze refers to the movement of cold air from land towards sea during nighttime.
  • A is false but R is true.
  • Both A and R are true but R is not the correct explanation of A.
  • A is true but R is false.
  • Both A and R are true and R is the correct explanation of A.
Assertion: Seepage of water into the ground is an important part of the water cycle. Reason: Water that seeps into the ground becomes part of the groundwater.
  • A is false but R is true.
  • A is true but R is false.
  • Both A and R are true but R is not the correct explanation of A.
  • Both A and R are true and R is the correct explanation of A.
Assertion: Conduction is the transfer of heat through a material without the movement of its particles itself. Reason: In conduction, heat moves from the colder part to the hotter part of the material.
  • Both A and R are true and R is the correct explanation of A.
  • Both A and R are true but R is not the correct explanation of A.
  • A is false but R is true.
  • A is true but R is false.
Metal is a _______ conductor of heat.
  • poor
  • bad
  • good
  • average
When we come out in the sun we feel _______.
  • cold
  • warm
  • neutral
  • hot
The hot bodies radiate _______.
  • energy
  • cold
  • heat
  • light
The water and air are _______ conductors of heat.
  • average
  • good
  • bad
  • excellent
In cold regions like Ladakh, people have developed _______ to conserve water.
  • wells
  • ice stupas
  • water tanks
  • reservoirs
Woollen clothes keep us warm during winter.
  • Rarely
  • Sometimes
  • False
  • True
Water vapour rises and cools to form clouds in the water cycle.
  • Sometimes
  • False
  • Rarely
  • True
Water at a higher temperature feels hotter.
  • Rarely
  • Sometimes
  • False
  • True
Seepage of water into the ground is part of the water cycle.
  • True
  • Rarely
  • False
  • Sometimes
Water and air are good conductors of heat.
  • Rarely
  • Sometimes
  • False
  • True
Match the following: Land breeze blows during:
  • day
  • night
  • summer
  • winter
Match the following: Sea breeze blows during:
  • summer
  • night
  • winter
  • day
Match the following: Dark coloured clothes are preferred during:
  • day
  • night
  • summer
  • winter
Match the following: Light coloured clothes are preferred during:
  • day
  • night
  • summer
  • winter
What is the process by which heat is transferred through direct contact between particles in a solid?
  • Convection
  • Radiation
  • Conduction
  • Evaporation
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