Welcome to your Grade 9 Physics chapter 7
After carefully reading the following 30 questions, choose the correct answer.
1.
What is the term for the degree of hotness or coldness of an object?
2.
Which temperature scale is part of the International System of Units (SI)?
3.
What is the boiling point of pure water at standard atmospheric pressure on the Celsius scale?
4.
Which type of thermometer is specifically designed to measure human body temperature?
5.
What is the freezing point of water on the Fahrenheit scale?
6.
Thermal expansion is the tendency of matter to change its shape, area, and volume in response to a change in:
7.
Which thermometer is used to measure very high temperatures without making contact with the object?
8.
The formula used to convert a temperature from Celsius (Tc) to Kelvin (Tk) is:
9.
What is absolute zero in the Kelvin scale?
10.
Which liquid is commonly used in laboratory thermometers due to its wide range of liquid state?
11.
Why is there a constriction (kink) in the tube of a clinical thermometer?
12.
What is the normal human body temperature on the Celsius scale?
13.
Which of the following describes linear expansion?
14.
If the temperature of an object is 0 °C, what is its equivalent in Kelvin?
15.
What happens to most materials when they are cooled?
16.
The coefficient of linear expansion (α) is measured in which unit?
17.
Which temperature scale has 180 divisions between the freezing and boiling points of water?
18.
Resistance thermometers operate based on the change of:
19.
What is the term for the expansion of a material in two dimensions?
20.
Which of these is a safety precaution for extreme temperatures?
21.
Bimetallic strips are used in thermostats because different metals have different:
22.
What is the upper fixed point of a thermometer calibrated in Celsius?
23.
A change in temperature of 1 °C is equal to a change of:
24.
To convert Fahrenheit (Tf) to Celsius (Tc), the formula is:
25.
Which thermometer is based on the principle of thermal expansion of a gas?
26.
When gaps are left between railway tracks, it is to allow for:
27.
Absolute temperature is measured starting from:
28.
Which physical property changes in a bimetallic strip when heated?
29.
The SI unit of temperature is the:
30.
Alcohol thermometers are preferred over mercury in very cold regions because alcohol has a:
