Question

Hello, I have some science questions I'd like to double-check before I submit them:

The temperature at which water changes from a gas to a liquid is
Select one:
a. –150°C
b. 100°C
c. –273.15°C
d. 0°C***

A man puts a tea kettle on a stove and turns on the burner. After a few minutes, all the water in the tea kettle is hot.
What process is most responsible for heat spreading throughout the water in the tea kettle?
Select one:
a. Radiation
b. Convection***
c. Conduction
d. Expansion

What is a positive consequence of increased energy use?
Select one:
a. Polluting the environment
b. Using up energy resources
c. Global climate change
d. More choices for fast transportation***

Explain two ways that you can conserve energy in your daily life.
My answer:
One way to conserve energy in everyday life is by switching off lights after you leave a room. This is very easy to do and make a habit of and saves a lot of energy in the long term.
Another way to conserve energy is to wear warm clothing (e.g. a sweater) when you feel a little bit chilly, instead of turning the heat up. This saves the energy used to heat air.

Answer 1

water does not boil at the freezing point.

The rest looks ok.

Answer 2

Oh, sorry, I thought it was the condensation temperature. It is 100°C.
Thank you!

Answer 3

ah, steam also turns to water at 100 deg C (at 1 atm)
water FREEZES at 0 deg C

Answer 4

100°C was correct