DAV CLASS 7 SCIENCE CHAPTER 5 HEAT SOLUTIONS

Table of Contents

In This Post You can Download Notes of Chapter 5 Heat of Class 7 Science.All answers in this pdf are in simple language and in understandable language according to students of Class 7.In this Chapter Students will Understand the concept of Heat,Temperature and Heat Transfer.

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In this Chapter Students will Understand the Concept of Heat ,Temperature and Heat Transfer.

Heat Travels from hotter to colder objects means from high Temperature to low Temperature.

Modes to Transfer Heat

Heat Can Transfer From one object to another by 3 different ways.

1.CONDUCTION – In this Mode of Transfer of heat, heat travels from one particle to another particle without any actual movement of Particle. for example : One end of a Spoon feels hotter after few minutes when we keep other end of spoon on burning flame.

CONVECTION-In this Mode of Transfer of Heat heated Particle leave their space and move towards lower temperature .Cooler Particle comes to fill that space . This occur in Liquid and Gases. Means in this mode Particle Actually leave their Place. For example : land breeze & Sea Breeze.

RADIATION – In this Mode of heat Transfer their is no need of Material Medium. Heat Can travel from High Temperature to Low Temperature without any Medium. for example We receive Heat from Sun through Radiation.

Decorated Accordion Table

🌡️ Difference Between Clinical and Laboratory Thermometer

Feature	Clinical Thermometer	Laboratory Thermometer
Purpose	Measures human body temperature	Measures temperature of substances in laboratories
Temperature Range	35°C to 42°C	-10°C to 110°C
Kink	Has a kink near the bulb	No kink present
Reading Method	Reading taken after removing thermometer	Reading taken while thermometer is inside substance
Use	Used in homes and hospitals	Used in science laboratories
Shape	Short and compact	Long and straight

	Clinical Thermometer	Laboratory Thermometer
Purpose	Used to measure human body temperature	Used to measure temperature of liquids and substances in laboratories
Temperature Range	Usually 35°C to 42°C	Usually -10°C to 110°C
Kink Present	Has a kink near the bulb	No kink present
Reading Method	Reading can be noted after removing from body	Must be kept in substance while reading
Use	Used by doctors and at home	Used in science laboratories
Shape	Short and compact	Long and straight
Accuracy Needed	Designed for body temperature accuracy	Designed for wider temperature measurements

DIFFERENCE BETWEEN LAND AND SEA BREEZE

LAND BREEZE	SEA BREEZE
At Night Land Cools down faster than sea .The Warm air above sea rises and cooler air from land moves towards sea.This is known as Land Breeze.	During day land heats up faster than water.The Warm air above the land rises and cooler air from sea rushes into take its place .we call this sea breeze.

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