That depends entirely on the tea kettle.
Depends on the kettle
Yes, there is, but they look much the same - just without the whistling cover. The Chinese, who presumably know something about tea, boil their water separately, and then add it to the teapot. The concept of a "tea kettle" is unknown there.
The best way to hold a kettle is by the handle. If the kettle does not have a handle then one should use a oven mitt or a pot holder.
When a tea kettles water boils, steam exits the hole in the sound of a loud whistle.
Example sentence - I heated the water in the kettle to make tea.
A kettle is used for boiling water usually used for making a cup of coffee or tea.
Assuming you are referring to a tea kettle, it should be filled no more than 3/4 full. If you are referring to an electric kettle however, then the amount ranges from 1.5 - 1.7 litres.
the kettle is made from iron. Matter passes through and that's why the water is the same temperature as the bottom of the kettle.