Class 7 Exam  >  Class 7 Notes  >  Science (Curiosity) Class 7 - New NCERT  >  Very Short Question Answers: Heat Transfer in Nature

Class 7 Science Chapter 7 Very Short Question Answers - Heat Transfer in Nature

Q1: Define temperature.

Ans: The measure of hotness or coldness of an object is called temperature. It is usually measured in "degrees".

Q2: Name the device used to measure temperature.

Ans: A thermometer is a device used to measure temperature.

Class 7 Science Chapter 7 Very Short Question Answers - Heat Transfer in NatureThermometer

Q3: What is the unit of temperature as adopted by India?

Ans: Degree Celsius (°C)

Q4: The bulb of the laboratory thermometer should not touch the surface of the ________________.

Ans: Container.

Q5: Give an example to show the transfer of heat from one body to another.

Ans: Any utensil kept on flame becomes hot because heat transfers from flame to the utensil.

Q6: Heat always flows from a hotter object to ________________.

Ans: Colder object

Q7: In solid heat is transferred by the process of

a. Conduction
b. Convection
c. Radiation
d. None of these

Ans: Conduction.

Q8: Give examples of conductors.

Ans: Aluminium, copper, iron, etc.Class 7 Science Chapter 7 Very Short Question Answers - Heat Transfer in Nature

Q9: Give examples of insulators.

Ans: Wood, plastic, rubber

Q10: Insulators are ________ conductors of heat.

Ans: Poor

Q11: Conductors are _____________ conductors of heat.

Ans: Good

Q12: Name the process by which heat transfers in air.

Ans: Convection.Class 7 Science Chapter 7 Very Short Question Answers - Heat Transfer in Nature

Q13: From the sun, the heat comes to us by the process called ________________.

Ans: Radiation.

Q14: Which of the two absorbs more radiation- a dark-coloured object or a light-coloured object?

Ans: A dark-coloured object.

Q15: Land breeze blows at the time of __________ whereas Sea breeze blows at the time of _________.

Ans: Night, DayClass 7 Science Chapter 7 Very Short Question Answers - Heat Transfer in Nature

Q16: Which type of clothing should be preferred for the month of June and for the month of January?

Ans: Light-coloured clothes in June and Dark coloured clothes in January

Q17: Name two sources of groundwater.

Ans: Wells and bore wells.

Q18: What is the continuous movement of water through evaporation, condensation, and precipitation called?

Ans: Water cycle.

Q19: What is the process of water seeping into the ground through soil and rocks called?

Ans: Infiltration.

Q20: What is an ice stupa, and where is it used?

Ans: A cone-shaped structure of frozen water used in Ladakh to store water for the summer.

The document Class 7 Science Chapter 7 Very Short Question Answers - Heat Transfer in Nature is a part of the Class 7 Course Science (Curiosity) Class 7 - New NCERT.
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FAQs on Class 7 Science Chapter 7 Very Short Question Answers - Heat Transfer in Nature

1. What are the three methods of heat transfer?
Ans. The three methods of heat transfer are conduction, convection, and radiation. Conduction occurs when heat is transferred through direct contact between materials. Convection involves the movement of heat through fluids (liquids and gases) as warmer areas rise and cooler areas sink. Radiation is the transfer of heat in the form of electromagnetic waves, which can occur through a vacuum.
2. How does conduction work in everyday life?
Ans. Conduction works in everyday life when you touch a hot object, like a metal spoon left in a hot pot. Heat travels from the hot spoon to your hand through direct contact, making your hand feel warm. This transfer of heat occurs because the faster-moving particles in the hot spoon collide with the slower-moving particles in your hand.
3. Can you give an example of convection?
Ans. An example of convection is boiling water in a pot. As the water at the bottom of the pot heats up, it becomes less dense and rises to the top. The cooler water at the top then moves down to take its place. This cycle continues, creating a convection current that evenly distributes heat throughout the water.
4. What role does radiation play in our daily lives?
Ans. Radiation plays a significant role in our daily lives, particularly in how we receive heat from the sun. The sun emits energy in the form of radiation, which travels through the vacuum of space and warms the Earth. We also experience radiation when we feel warmth from a fireplace or a heater without being in direct contact with it.
5. Why is understanding heat transfer important in nature?
Ans. Understanding heat transfer is crucial in nature because it helps explain various natural phenomena, such as weather patterns, ocean currents, and climate change. It also informs how living organisms adapt to their environments, how ecosystems function, and how energy flows through different systems, impacting life on Earth.
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