WorksheetsHEAT
Total questions: 13
Worksheet time: 13mins
What acts as an indication of the weather outside being very cold, with temperatures in the range of -2°C to 8°C?
(a) Mild sunlight (d) Heavy clouds and grey skies
(b) Fogged window panes
(c) Leaves rustling in the wind
(d) Heavy clouds and grey skies
Several nails were attached to a metallic rod, through its length by using drops of wax as adhesive. This rod was placed horizontally with one end subjected to the flame of a burner, as depicted, below.
Nails closer to point Y begin to fall. If the burner is removed after a short while, nails closer to point X, remained affixed. Which end of the rod is hotter, and why?
(a) X is hotter as the wax and nails both remained stuck to the rod
(b) X is hotter because heat moved from Y and was transferred to X
(c) Y is hotter as the wax melted quicker due to the heat of the rod
(d) Y is hotter as the gravity acted faster near Y, dropping the nails
What is the average range of a laboratory thermometer and how does it compare to the range of a clinical thermometer?
(a) -10 to 110°C; much greater than the range of clinical thermometers
(b) -100 to 100°C; much greater than the range of clinical thermometers
(c) 10 to 50°C; much lesser than the range of clinical thermometers
(d) 37 to 40°C; much lesser than the range of clinical thermometers
From the pictures given below, find the least count of both the thermometers.
How does the least count of the laboratory thermometer compare to that of the clinical thermometer’s least count?
(a) It is 0.3°C greater than least count of a clinical thermometer
(b) It is 0.9°C greater than least count of a clinical thermometer
(c) It is 0.5°C lower than least count of a clinical thermometer
(d) It is 0.1°C lower than least count of a clinical thermometer
Which instrument should be used to measure the boiling point of a liquid and why?
(a) Clinical thermometer; it is easier to read
(b) Clinical thermometer; it has a greater range.
(c) Laboratory thermometer; it is easier to read.
(d) Laboratory thermometer; it has a greater range.
Refer to the following statements:
A. To study the behaviour of substances at different temperatures
B. To measure boiling point and freezing point during a science experiment
C. To measure human body temperature
Which of these statements justify the need of laboratory thermometers?
(a) Only A
(c) Only C
(b) Both A and C
(d) Both A and B
What role does the kink play in making the process of reading temperatures easier, and in which kind of thermometer does it help?
(a) Kink inside the clinical thermometer prevents the mercury thread from falling.
(b) Kink inside the laboratory thermometer lowers the mercury thread, faster.
(c) Kink inside the laboratory thermometer requires it to be held still
(d) Kink inside the clinical thermometer requires it to be held upright.
Student A, takes the temperature reading of Student B and holds the thermometer horizontally while moving it to correctly note the temperature. Student B argues that the reading is inaccurate since Student A took too much time to read it and moved the thermometer a lot. Student A insists that the reading is accurate. What makes Student A so sure about the temperature reading?
(a) Laboratory thermometers are always held horizontally to prevent fluctuations.
b) Clinical thermometers are held horizontally to prevent fluctuations
(c) Readings on a laboratory thermometer remain unchanged
(d) Readings on a clinical thermometer remain unchanged.
A child observes the process of ironing clothes. The base of the iron is very hot. The clothes are warm; however, the top handle of the iron is not warm at all. Which of the following is an incorrect conclusion, based on his observations?
(a) Heat is trapped inside the iron’s handle
(b) Heat is conducted by the iron on to the clothes
(c) The material of the iron’s handle is an insulator
(d) The handle will not radiate any heat to bare hands.
A student boils water in a pan, on an electric stove. Three incidents thus, occur.
1. The top of electric stove remains cold, yet heat reaches the pan
2. Water in the pan is boiled and produces steam
3. The handle of the pan becomes hot and requires a mitten to lift it
Which three processes do the three steps represent, in terms of heat transfer?
(a) 1: Radiation, 2: Conduction and 3: Convection
(b) 1: Convection, 2: Radiation and 3: Conduction
(c) 1: Radiation, 2: Convection and 3: Conduction
(d) 1: Convection, 2: Conduction and 3: Radiation
An object and a source of heat are placed in two different experimental setups.
Setup 1: Vacuum is present between the object and the source in a confined tube. Setup
2: Metallic fibres are stuffed into the space between the source and object, in a confined tube.
To achieve successful heating of the object, which modes of heat transfer must occur in the two setups?
(a) Setup 1: Radiation, Setup 2: Convection
(b)Setup 1: Radiation, Setup 2: Conduction
(c) Setup 1: Insulation, Setup 2: Conduction
(d) Setup 1: Insulation, Setup 2: Convection
In coastal areas, in the day-time, the air circulation between unevenly heated land and sea, causes a sea breeze. Which natural processes are responsible for such air movements?
(a) Warm air from sea is radiated upwards and cold air rushes in, creating sea breeze.
(b) Warm air from land rises up by convection and cold air fills its place, as sea breeze.
(c) Warm air from sea is conducted to air and cold air rushes in, creating land breeze.
(d) Warm air from land and warm air from sea, both rise and are cooled by insulation.
In cold climatic areas that receive a lot of snow, people wear thick coats with woollen inner linings and snow-resistant synthetic outer layer. Which is a property of the materials contributes most to protecting them from the cold?
(a) Inner layer reflects the thermal radiation of the human body
(b) Outer layer allows the conduction of heat throughout the coat
(c) Outer layer restricts the conduction of cold winds inside the coat
(d) Inner layer lets warmth from the body to be trapped within the coat
