Practice the AP 7th Class Science Bits with Answers Chapter 9 Heat, Temperature and Climate on a regular basis so that you can attempt exams with utmost confidence.
AP 7th Class Science Bits Chapter 9 Heat, Temperature and Climate with Answers
I. Multiple Choice Questions
Choose the correct answer and write its letters in the brackets.
1. It is a form of energy that flows from a hotter body to a cooler body.
A) Heat
B) Light
C) Sound
D) Electricity
Answer:
A) Heat
2. When heat energy flows from our body to Lassi. Here,
A) Lassi loss Heat energy
B) Body lose heat energy
C) Body gain heat energy
D) A and C
Answer:
B) Body lose heat energy
3. Joules are units of
A) Humidity
B) Climate
C) Heat
D) Air pressure
Answer:
C) Heat
4. The degree of hotness or coldness is called ………..
A) Humidity
B) Temperature
C) Heat
D) Air pressure
Answer:
D) Air pressure
5. Temperature is measured in…….
A) Degrees of Celsius
B) Degrees of Fahrenheit
C) Kelvin
D) All
Answer:
D) All
6. The SI unit of temperature is ………….
A) Degrees of Celsius
B) Degrees of Fahrenheit
C) Kelvin
D) All
Answer:
C) Kelvin
7. Kelvin is written as
A) °C
B) °F
C) °K
D) K
Answer:
D) K
8. Which is correct?
i) Heat is the degrees of hotness or coldness.
ii) Heat is measured in joules
A) i only
B) ii only
C) both i & ii
D) both are incorrect
Answer:
B) ii only
9. Cooking utensils are made of ………..
A) conductors
B) insulators
C) fuels
D) none of the above
Answer:
A) conductors
10. Handles of cooking vessels are made of …………….
A) conductors
B) insulators
C) fuels
D) none of the above
Answer:
B) insulators
11. A: Metals are used to make cooking vessels.
R: Metals allow heat through them.
Which is correct?
A) A & R are correct and R supports A
B) A & R are correct but R does not support A
C) A is correct but R is wrong
D) R is Correct but A is wrong
Answer:
A) A & R are correct and R supports A
12. The ability of a material to conduct heat is called …………..
A) Thermal conductivity
B) Thermal resistivity
C) Thermometer
D) None
Answer:
A) Thermal conductivity
13. It is not a good conductor.
A) Copper
B) Steel
C) Plastic
D) Cast iron
Answer:
C) Plastic
14. Insulator is….
A) Water
B) Glass
C) Plastic
D) All
Answer:
D) All
15. Heat cannot pass in the mode of
A) Conduction
B) Convection of heat
C) Radiation of heat
D) None
Answer:
D) None
16. In which heat is transferred from one end to another end by the mode of conduction.
A) Steel spoon
B) Water
C) A and B
D) Sun to earth
Answer:
A) Steel spoon
17. This mode of transfer of heat happens more in solid conductors
A) Conduction
B) Convection of heat
C) Radiation of heat
D) None
Answer:
A) Conduction
18. This process of transfer of heat from source of heat to surface by the motion of particles
A) Conduction
B) Convection of heat
C) Radiation of heat
D) all
Answer:
B) Convection of heat
19. This is not a medium of heat energy.
A) Solid
B) Liquid
C) Gas
D) None
Answer:
D) None
20. This mode of transfer of heat doesn’t require any media.
A) Conduction
B) Convection of heat
C) Radiation of heat
D) All
Answer:
C) Radiation of heat
21. The process of transfer of heat in the form of waves is called
A) Conduction
B) Convection of heat
C) Radiation of heat
D) All
Answer:
C) Radiation of heat
22. Which instrument can control the transfer of heat (loss of heat)?
A) Thermos flask
B) Thermometer
C) Thermal scanner
D) All
Answer:
A) Thermos flask
23. The flask retains hot inside the flask for
A) a few hours
B) ever
C) never
D) a few weeks.
Answer:
A) a few hours
24. Thermos flask was invented by
A) Sir James cook
B) Sir James Chadwick
C) Sir James Dewar
D) Sir James watts
Answer:
C) Sir James Dewar
25. Which of the following expands on heating and contracts on cooling?
A) Solid
B) Liquid
C) Gas
D) All
Answer:
D) All
26. Air on cooling
A) contracts
B) occupy less space.
C) expand
D) A and B
Answer:
D) A and B
27. Warm air is lighten than cold air. This property of air is used in
A) hot air balloons
B) kites
C) rockets
D) all
Answer:
A) hot air balloons
28. Thermometer contains bulb of
A) mercury
B) alcohol
C) A or B
D) silver
Answer:
C) A or B
29. Mercury is a in room temperature.
A) solid
B) liquid
C) gas
D) all
Answer:
A) solid
30. This is not a property of the mercury .
A) Its expansion is uniform.
B) It is a good conductor of heat.
C) It easily sticks to the sides of glass tube.
D) It has a high boiling point.
Answer:
C) It easily sticks to the sides of glass tube.
31. The boiling point and a freezing point of the mercury are
A) -39°C and 357°C
B) 357°C and-39°C
C)100°C and 0°C
D) none
Answer:
B) 357°C and-39°C
32. A: The freezing point of alcohol is more than -100°C.
R: Alcohol can be used to measure very low temperatures.
A) A & R are correct and R supports A
B) A & R are correct but R does not support A
C) A is correct but R is wrong
D) R is correct but A is wrong
Answer:
D) R is correct but A is wrong
33. Number of divisions in Fahrenheit scale is
A) 100
B) 212
C) 180
D) 32
Answer:
C) 180
34. Number of divisions in Kelvin scale is
A) 100
B) 212
C) 180
D) 32
Answer:
A) 100
35. Number of divisions in Celsius scale is
A) 100
B) 212
C) 180
D) 32
Answer:
A) 100
36. Which prevents the mercury from flowing back into the bulb in clinical thermometer.
A) Capillary
B) Kink
C) Bulb
D) Magnet
Answer:
B) Kink
37. Laboratory thermometer can measure higher temperatures than clinical thermometer because, it has
A) long bulb
B) long stem
C) short bulb
D) short stem
Answer:
B) long stem
38. This thermometer can work without Mercury.
A) Six max and min thermometer
B) Digital Thermometer
C) Clinical thermometer
D)All
Answer:
B) Digital Thermometer
39. Who invented Six’s maximum and minimum thermometer in 1780?
A) Sir James cook
B) James watt
C) Sir James Dewar
D) James Six
Answer:
D) James Six
40. The correct order is
i) After one or two minutes, take the thermometer out and note the reading,
ii) Place the bulb of the thermometer under your friend’s tongue.
iii) Wash the clinical thermometer properly with an antiseptic solution.
iv) To lower the mercury level, hold the thermometer firmly and give some jerks.
A) iv, ii, i, iii
B) iv, iii, ii, i
C) iii, iv, ii, i
D) ii, iii, iv, i
Answer:
C) iii, iv, ii, i
41. The normal temperature of the human body is
A) 37°C
B) 98.4°F
C) 310K
D) all
Answer:
D) all
42. Ventilators are working on
A) Air expands on heating
B) Air contracts on heating
C) Metal expands on heating
D) Air contracts on cooling
Answer:
A) Air expands on heating
43. Which is used to measure the air pressure?
A) Hygrometer
B) Thermometer
C) Barometer
D) Rain gauge
Answer:
C) Barometer
44. A: If roofs were weak, they could be lifted and blown away.
R: The moving air creates high pressure.
A) A & R are correct and R supports A
B) A & R are correct but R does not support A
C) A is correct but R is wrong
D) R is correct but A is wrong
Answer:
C) A is correct but R is wrong
45. Rain fall is measured with a
A) hygrometer
B) thermometer
C) barometer
D) rain gauge
Answer:
D) rain gauge
46. This is not a measuring component of weather
A) humidity
B) temperature
C) wind speed
D) none
Answer:
D) none
47. Humidity is measured in
A) g/cubic meter
B) mm/cubic meter
C) °C
D) m/°C
Answer:
A) g/cubic meter
48. In summer, the humidity of air is
A) low
B) high
C) no change
D) zero
Answer:
B) high
49. High temperatures, along with humidity sometimes may cause
A) kwashiorkor
B) beriberi
C) corona
D) sunstroke
Answer:
D) sunstroke
50. It gives the information about atmospheric conditions in a specific area and time.
A) Weather
B) Climate
C) A and B
D) None
Answer:
A) Weather
51. This deals with a long period.
A) Weather
B) Climate
C) A and B
D) None
Answer:
B) Climate
52. It affects our lifestyle
A) Weather
B) Climate
C) A and B
D) None
Answer:
B) Climate
53. Which phenomenon measures atmospheric conditions in a specific area and time?
A) Weather
B) Climate
C) A and B
D) None
Answer:
A) Weather
II. Fill in the blanks
1. Heat is a form of energy that flows from a ………………. body to a ………………. body.
2. Heat is measured in ………………. with calorimeter
3. Heat flows from a body of high temperature to a body of low temperature. This direction is determined by ………………. .
4. The degree of ………………. is called ‘temperature’.
5. Degree of Celsius is written as ………………. .
6. Degree of Fahrenheit is written as ………………. .
7. Some materials allow heat through them, this property is called ………………. .
8. Water, air, clothes, glass, cork, plastic, wood etc. are some examples of ………………. .
9. This process of transfer of heat from hotter to colder end through the conductor’ is called ………………. .
10. The contact which transfers heat by any mode is called ………………. .
11. Water is a ………………. of heat.
12. Heat is transferred by means of ………………. called convectional currents.
13. The materials which help in transfer of heat from one place to another are called ………………. .
14. Sun’s heat transfers to earth in the form of ………………. .
15. The thermal scanner receives the heat in the form of ………………. to measure our body temperature.
16. The inner ………………. in thermos flask protects the contents (tea, coffee, milk) poured in the flask from losing heat through radiation.
17. As there is ………………. between the walls of the flask; neither conduction nor convection of heat takes place.
18. Particles of substances occupies ………………. space when they get heated.
19. Small gaps left between rails in railway tracks, because metal ………………. on heat
20. ………………. are used to measure temperature.
21. The principle involved in working of a thermometer is ………………. .
22. The melting point of ice is ………………. °C
23. The melting point of ice and boiling point of water in Fahrenheit are ………………. .
24. The melting point of ice and boiling point of water in SI units are ………………. .
25. The formula to convert Celsius to Kelvin is ………………. .
26. The formula to convert Celsius to Fahrenheit is ………………. .
27. ………………. is used in hospitals to measure the temperature of the human body.
28. Clinical Thermometer has a ………………. that prevents the mercury from flowing back into the bulb when it was taken out of the patient’s mouth.
29. After taking readings in six max and min thermometer the indicators I<sub>2</sub> and I<sub>1</sub> are brought to their original places by using ………………. .
30. The normal temperature of the human body is ………………. .
31. Smoke and hot air moves up because it ………………. on heating and becomes lighter.
32. The force applied by air oh any surface in contact is called ………………. .
33. The air pressure becomes ………………. when it is compressed.
34. When air expands and raises up it creates ………………. .
35. ………………. drives the air high pressure from surrounding to move and occupy that place.
36. Air pressure is measured in height of ………………. level in centimeters
37. ………………. is measured in millimeters by using a rain gauge.
38. The water vapour present in the air is called ………………. .
39. ………………. is used to measure humidity in air and it is expressed in grams per cubic meter.
40. Evaporation of ………………. from our body makes us cool to maintain our body temperature.
41. The day-to-day variations in the components like temperature, humidity, rainfall, wind speed are called ………………. .
42. ………………. forecasting is the application of science and technology to predict the conditions of the atmosphere using components of weather for a given location and time.
43. It is easier to know about weather with the help of ………………. than tables.
44. ………………. study and work on weather and record weather every day.
45. The average weather pattern taken over a long period, say 25 years or more, is called the ………………. of the place.
46. Expansion of IMD is ………………. .
47. The abnormal variation in the components of climate is called ………………. .
Answer:
- hotter, cooler
- Joules or calories
- temperature
- hotness or coldness
- °C
- °F
- conductivity
- insulators
- conduction
- Thermal contact
- poor conductor
- currents
- medium
- radiation
- radiation
- silver coating
- no medium or vacuum
- more
- expand
- Thermometers
- expansion of liquids on heating
- 0
- 32°F, 212°F
- 273K, 373K
- K °C + 273
- Clinical Thermometer
- kink
- a magnet
- 37°C or 98.4°F
- expands
- air pressure
- more
- low pressure
- Low pressure
- mercury
- Rainfall
- Humidity
- Hygrometer
- Sweat
- weather
- Weather
- graphs
- Meteorologists
- Climate
- Indian Meteorological Department
- climate change
III. Match the following
1.
| Group – A | Group – B |
| 1) heat | a) cm of mercury level |
| 2) temperature | b) Kelvin |
| 3) air pressure | c) mm |
| 4) rain fall | d) Joule |
Answer:
| Group – A | Group – B |
| 1) heat | d) Joule |
| 2) temperature | b) Kelvin |
| 3) air pressure | a) cm of mercury level |
| 4) rain fall | c) mm |
2.
| Group – A | Group – B |
| 1) humidity | a) barometer |
| 2) temperature | b) hygrometer |
| 3) air pressure | c) rain gauge |
| 4) rainfall | d) thermometer |
Answer:
| Group – A | Group – B |
| 1) humidity | b) hygrometer |
| 2) temperature | d) thermometer |
| 3) air pressure | a) barometer |
| 4) rainfall | c) rain gauge |
3.
| Group – A | Group – B |
| 1) water | a) radiation |
| 2) heat | b) convection |
| 3) metal | c) expansion |
| 4) vacuum | d) conduction |
Answer:
| Group – A | Group – B |
| 1) water | b) convection |
| 2) heat | c) expansion |
| 3) metal | d) conduction |
| 4) vacuum | a) radiation |
4.
| Group – A | Group – B |
| 1) nail | a) clinical thermometer |
| 2) cloth | b) lab thermometer |
| 3) mercury | c) conductor |
| 4) alcohol | d) insulator |
Answer:
| Group – A | Group – B |
| 1) nail | c) conductor |
| 2) cloth | d) insulator |
| 3) mercury | a) clinical thermometer |
| 4) alcohol | b) lab thermometer |
5.
| Group – A | Group – B |
| 1) weather | a) low pressure |
| 2) climate | b) long period |
| 3) wind | c) water vapour |
| 4) humidity | d) rapid change |
Answer:
| Group – A | Group – B |
| 1) weather | d) rapid change |
| 2) climate | b) long period |
| 3) wind | a) low pressure |
| 4) humidity | c) water vapour |
6.
| Group – A | Group – B |
| 1) gas expansion | a) alcohol thermometer |
| 2) liquid expansion | b) parachute |
| 3) solid expansion | c) railway rails |
| 4) gas contraction | d) LPG cylinder |
Answer:
| Group – A | Group – B |
| 1) gas expansion | b) parachute |
| 2) liquid expansion | a) alcohol thermometer |
| 3) solid expansion | c) railway rails |
| 4) gas contraction | d) LPG cylinder |
7.
| Group – A | Group – B |
| 1) Kelvin | a) °F |
| 2) Fahrenheit | b) K |
| 3) Celsius | c) J |
| 4) Heat | d) °c |
Answer:
| Group – A | Group – B |
| 1) Kelvin | b) K |
| 2) Fahrenheit | a) °F |
| 3) Celsius | d) °c |
| 4) Heat | c) J |