Question

why it matters
here are some questions to consider as you work through the unit. can you answer any of the questions now? revisit these questions at the end of the unit to apply what you discover.
questions\tnotes
what makes some objects feel colder than others at the same temperature?
when have you attempted to minimize the change in temperature of an object from hot to cold or cold to hot?
why do regions near large bodies of water often have variations in weather from surrounding areas?
what do we mean when we say a technology is \energy efficient\?
when have you experienced a change in the form of energy in your everyday life?
70 unit 2 energy transfer

Explanation:

1. What makes some objects feel colder than others at the same temperature? - Different materials have different thermal conductivities. Objects with higher thermal conductivity draw heat from our bodies faster, making them feel colder.
2. When have you attempted to minimize the change in temperature of an object from hot to cold or cold to hot? - Using insulation like thermos - flasks for hot or cold liquids, or wrapping objects in blankets to slow down heat transfer.
3. Why do regions near large bodies of water often have variations in weather from surrounding areas? - Water has a high specific heat capacity. It heats up and cools down more slowly than land, influencing local temperature, humidity, and wind patterns.
4. What do we mean when we say a technology is "energy - efficient"? - It means the technology can perform a task using less energy input compared to less - efficient alternatives, often by reducing energy losses like heat or friction.
5. When have you experienced a change in the form of energy in your everyday life? - Examples include using a toaster (electrical energy to heat energy), driving a car (chemical energy in fuel to mechanical energy), or using a flashlight (chemical energy in batteries to light energy).

Answer:

1. Different materials have different thermal conductivities.
2. Using insulation for liquids or wrapped objects.
3. Water has high specific heat capacity affecting local climate.
4. It uses less energy input for a task.
5. Using toaster, car, flashlight etc.