That sounds like the description of "dark matter".
The study of how matter and energy interact is commonly known as physics.
Matter is found in most places in the universe.
Gravitation is the universal force of attraction between all matter in the universe.
Study matter and energy and how they interact.
Because it takes up space, and anythign that has mass in it is matter.
An isolated system I think
A closed system
Neutrinos are subatomic particles that interact only very weakly with "normal" matter. Because they don't interact with anything else, they also don't interact much with any detector device, so they are very difficult to detect. According to our (current( understanding of physics, neutrinos should be emitted every time a helium atom is formed out of hydrogen fusion, so there ought to be billions passing through the Earth each second.
Anything that has volume and takes up space in the universe.
anything that has a weight and takes up space.
The word "universe" means "everything", so basicly, there's only one universe that includes everything everywhere. You can't "get to a different universe", because no matter where you "go" -may your target be a point in space, in time or a different dimension- you are always within the "collection" of everything, the universe.
The word you're looking for is "matter." Matter is anything that has mass and occupies space, and it is the fundamental substance that makes up all physical objects in the universe.
No; all around us, all the Universe is matter in different known or still unknown state.
Everything in the universe is made up of matter - anything that has a mass and takes up space. Matter is composed of tiny particles called atoms.
The study of how matter and energy interact is commonly known as physics.
It means that the universe is cold and heartless. No matter how important you feel you are or how dear you hold anything, the universe doesn't care. We are all insignificant in the universe.
Matter Everything is made out of matter Hope that helps. In a general sense Matter is the right answer What is matter? Matter is anything and everything taht takes up space in and or of an object. For further clearification search "What is matter" in the search box