Let's think of an example, water boiling to form steam.
When the water boils, it obviously does not have the same shape, and liquids and gases don't have a definite shape, so shape is not the answer.
To force a phase change, water needs energy in the form of heat, so temperature is also not the answer.
The volume is also changed, and gases take up more space than liquids, so volume is also not the answer.
So, after ruling the other three out, the one we're left with is mass, and that is the answer: mass remains constant during a phase change
Don't hesitate to ask further questions!
Hope I helped!! xx
Ionising radiation (ionizing radiation) is radiation that carries enough energy to free electrons from atoms or molecules, thereby ionizing them. Ionizing radiation is made up of energetic subatomic particles, ions or atoms moving at high speeds (usually greater than 1% of the speed of light), and electromagnetic waves on the high-energy end of the electromagnetic spectrum.
Answer: hydroelectric dams
Explanation: Enormous energy is stored in water held back by hydroelectric dams. The energy is transformed into (a form of kinetic energy) as it falls across the dam. The falling water strikes the blades of a turbine and makes them spin, and the then turns the shaft of a generator.
The troposphere<span> is the first layer above the surface and contains half of the Earth's atmosphere. </span>Weather<span> occurs in this layer. </span><span> Many jet aircrafts fly in the </span>stratosphere<span> because it is very stable. Also, the ozone layer absorbs harmful rays from the Sun.</span><span> Meteors or rock fragments burn up in the </span>mesosphere.<span>The </span>thermosphere<span> is a layer with auroras. It is also where the space shuttle orbits. </span><span>The atmosphere merges into space in the extremely thin </span>exosphere<span>. This is the upper limit of our atmosphere.
I'm not sure if this helps you but I would say most of the changes happen in the troposphere because that is where the weather occurs. Sorry if this isn't the answer you were looking for.
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The fronts of the water create clouds so it has a lot of precipitation