Heat and Temperature Worksheet for Grade 7 with Solved
Heat and Temperature Worksheet for Grade 7: Heat and Temperature Worksheet for Grade 7 students with solution in this page. Students of Standard 7 who are already cleared concept on Heat and Temperature can solve this paper.
Measuring temperature
Q1) What is the temperature?
Ans. The measurements of warmness Or coldness of a substance.
Q2) Why does the temperature of the substance decrease?
The temperature of the substance decreases because of losing heat from the substance.
Q3) What instrument is used to measure temperature?
Ans. Thermometers
Q4) What is the expansion of liquid?
Ans. increase of volume of liquid by gaining heat.
Thermometers
Q1) What are thermometers?
Ans. Thermometers are used to measure temperature.
Q2) Why is Mercury used in thermometers?
Ans. Mercury used in thermometers for clear observations.
Q3) What are the scales of thermometers?
Ans. Celsius Fahrenheit and kelvin.
Q4) What is the melting point?
Ans. Melting point is a condition when solid changes into liquid.
Q5) What is the boiling point?
Ans. boiling point is a point when liquid changes into gaseous state.
Q6) What is the unit of celsius and kelvin thermometers?
Ans. Celsius – C
Kelvin – k
Q7) What is the boiling point of lead and iron?
Ans. lead 317
Iron – 1539
Q8) Write two features of clinical thermometers?
Ans. There is a fine bend in capillary tube
It ranges temperature from 35 c to 43c
Heat transfer
Q1) What is conduction?
Ans. The process of transferring heat from one particle to another without the motions of the particle through solid.
Q2) What is heat transfer
Ans. The process of transferring heat from one place to another.
Q3) What is heat insulators
Ans. substances that could not transfer heat is called heat insulator
Q4) What is conviction?
Ans. The process of transferring heat through liquid and gases by convection current is called conviction
Q5) What is a land breeze?
Ans. Winds blow from the land towards sea is called sea breeze
Q6) What is sea breeze
Ans. Wind blows from sea towards land.
Q7) What is radiation?
Ans. The process of heat transfer without participation of particles.
Q8) Why hot water container are polished
Ans. Hot water container are polished it can be kept hot for longer period of time.
Q10) Why is it more suitable to use light-coloured walls than dark colours?
Ans. Light colours less absorb radiated heat.