Science General · Environmental Studies

Temperature Concepts

1,111 Questions

Temperature concepts involve understanding thermal conditions across various scientific and daily life contexts. This includes ideal storage temperatures, celestial body heat, and climate ranges. These facts are commonly tested in general science and environmental awareness papers.

Celestial body temperaturesStorage and cooking temperaturesAtmospheric and climate temperatureLaboratory temperature ranges

Temperature Concepts Questions

Multiple choice

A nurse is about to take the temperature of a patient. One notices that the nurse jerks the clinical thermometer well, before placing it under the tongue of the patient. Why does she jerk it?

  1. The jerking makes the mercury level higher.

  2. To frighten the patient.

  3. To show her experience.

  4. To bring down the level of mercury below 35 degrees centigrade.

  5. To warm up the thermometer.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is done to bring down the level of mercury below 35 degrees centigrade. The level of mercury was higher up due to the kink.

Multiple choice

What is the range of a lab thermometer?

  1. 0 - 100 degrees

  2. Minus 10 - 110 degrees

  3. 10 - 100 degrees

  4. 94 - 108 degrees

  5. Minus 1 - 100 degrees
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The range of a lab thermometer is minus 10 - 110 degrees.

Multiple choice

A body originally at 60°C cools down to 40°C in 15 minutes when kept in air at a temperature of 25°C. What will be the temperature of the body at the end of 30 minutes?

  1. 35.2°C

  2. 31.5°C

  3. 28.7°C

  4. 15°C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Newton's Law of Cooling: T(t) = Ta + (T0 - Ta)e^(-kt). First interval: 40 = 25 + (60-25)e^(-15k) => 15 = 35e^(-15k) => e^(-15k) = 15/35 = 3/7. Second interval (30 min): T = 25 + (60-25)e^(-30k) = 25 + 35(e^(-15k))^2 = 25 + 35(3/7)^2 = 25 + 35(9/49) = 25 + 45/7 = 25 + 6.43 = 31.43 degrees C.

Multiple choice

A football was inflated to a gauge pressure of 1 bar when the ambient temperature was 15°C. When the game started next day, the air temperature at the stadium was 5°C. Assume that the volume of the football remains constant at 2500 cm3.

The amount of heat lost by the air in the football and the gauge pressure of air in the football at the stadium are respectively equal to

  1. 30.6 J, 1.94 bar

  2. 21.8 J, 0.93 bar

  3. 61.1 J, 1.94 bar

  4. 43.7 J, 0.93 bar
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Multiple choice physics heat and energy

Without green house effect, the average temperature of earth's surface would have been

  1. -18$^o$C
  2. 33$^o$C
  3. 0$^o$C
  4. 15$^o$C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The greenhouse effect itself occurs when short-wave solar radiation (which is not impeded by the greenhouse gases) heats the surface of the Earth, and the energy is radiated back through the Earth's atmosphere as heat, with a longer wavelength. In the wavelengths 5-30m a lot of this thermal radiation is absorbed by water vapour and carbon dioxide, which in turn radiate it, thus heating the atmosphere and land and ocean surface. This is natural and what keeps the Earth habitable.

Without the greenhouse effect overnight temperatures would plunge and the average surface temperature would be about minus 18C, about the same as on the moon, which lacks the shroud of our atmosphere.
Thus Option A is correct.