熱 and 温度: applying heat and measuring temperature
Distinguish heat from temperature through common combinations and read the size of a temperature change.
Applying heat
熱, read ねつ, means heat. 金属に熱を加えました。 means applying heat to metal.
熱を逃がす仕組みを調べました。 means investigating a mechanism for releasing heat. It does not also mean operating the device.
Measuring temperature
温度, read おんど, means temperature. 温度を数字で記録しました。 means recording the temperature numerically.
温度が二十度から三十度に上がりました。 says that the temperature rose from twenty to thirty degrees. The increase is ten degrees.
Action and measured result
熱を加えましたが、温度はまだ測っていません。 says that heat was applied but the temperature has not yet been measured. Separate heating from a measured value.
熱に強い材料を選びました。 means selecting heat-resistant material. The exact temperature it withstands is not specified.
If the temperature rises from twenty to thirty degrees, what is the increase?
Show the answer and why
Ten degrees. Distinguish the increase from the final temperature of thirty degrees.