GSCE O Levels Syllabus Secondary 2 Science Chapter 10: Transfer of Thermal Energy and its Effects

What is the definition of temperature

Temperature is the measurement of how hot or cold an object is

What is the SI unit of temperature?

The SI unit of Temperature is Kelvin (K)

Why do we use measuring devices to measure temperature and provide examples of a few measuring devices

Since the human sense of touch is subjective, we use measuring devices to measure temperature accurately. Examples include thermometers.

What do changes in temperature refer to?

Changes in temperature refer to tan object gaining or losing thermal energy, and the phenomenon is known as the transfer of thermal energy.

What happens if a glass of iced water is poured into a glass of hot/boiling water

The temperature of the glass of hot water would decrease . This is because thermal energy is being transferred from the hot water to the cold water.

How do we prevent the buckling of tracks

We prevent the buckling of tracks by putting expansion gaps at regular intervals to allow for expansion in the event of hot weather and contraction during cold weather, helping to maintain track integrity.

How much percent of thermal energy trapped in the atmosphere is absorbed by oceans?

90% of the thermal energy found in earth’s atmosphere

What are the consequences of the overheating of oceans?

1. Coral Bleaching

2. Plankton cannot adapt and die

3. loss of marine life

4. oceans expand causing sea levels to rise, leading to coastal erosion.

Why do pipes carrying hot fluids have flexible joints?\

Flexible joints allow pipes to expand without causing any damage