because it has mass and takes up space
If something cannot be seen but has mass and takes up space, it is matter. Matter is anything that has mass and occupies space, which includes both visible and invisible particles. Energy, on the other hand, refers to the ability to do work or cause a change and does not have mass or take up space.
Sound is not made up of matter; it is a disturbance that travels through a medium, such as air or water. Light, on the other hand, is made up of electromagnetic waves, which are forms of energy rather than matter.
One example of something that is not matter is electromagnetic radiation, such as light. While it can behave like particles in some situations, it does not have mass or occupy physical space in the same way matter does.
Moving air or wind is difficult to see. The motion of atoms can not bee seen with the unaided eye. One can not see the motion of tectonic plates. In these examples, the phenomena are not visible but one can measure them.
A closed system is a system that cannot exchange matter with its surroundings, but can exchange energy. A system that cannot exchange matter or energy with its surroundings is called an isolated system.
Yes, matter can be something that you can not see. This is because one form of matter is gas, which can not be seen.
No, because matter is something that takes up spaces, and matter is something that you cant see.
Sound cannot be Matter as we can not see sound and it has no mass
matter is something you can see or touch energy is not.
Yes, true steam (you cannot see it) is matter in the gas form.
The clear answer is, we don't. We cannot detect the hypothetical "dark matter", and the only reason we are talking about "dark matter" is that we cannot actually see enough mass in the Milky Way galaxy to account for the gravity that we know must be there - because the Milky Way would fly apart with only the mass that we can see. The "dark matter" may be in the form of invisibly-dim brown dwarf stars, or black holes, or "something else". Dark matter is the "something else". Everything you read about dark matter is a guess.
microrganisms
The air.
Gravity. We cannot see or directly detect "dark matter", and the only reason why astronomers talk about "dark matter" is that galaxies like the Milky Way appear to be spinning too fast for gravity to hold them together. Or at least, for the gravity of the mass that we can SEE to hold them together. Gravity comes from matter, and we can't see enough matter, so it must be "dark matter". This may be in the form of trillions of invisibly-dim brown dwarf stars, or in black holes from which no light ever escapes - or it may be something entirely new. "Dark matter" is the something new.
Well if you cannot see the model you are making you can use your hands by feeling what you are doing.
An illuminated source is something that is assisting in the viewing of something. It will allow people to see it when they normally cannot see it.
An illuminated source is something that is assisting in the viewing of something. It will allow people to see it when they normally cannot see it.