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Bagel bitesDark Matter
All matter has mass. People, buildings, rocks, water, the air, the sun, and everything else that makes up the physical universe (except for energy) is made up of matter. Mass is defined by its resistance to change in motion, commonly called inertia.
It is believed that about 4% of the mass in the Universe is normal matter. About 23% is dark matter (matter of unknown composition), the remainder being something even more mysterious called dark energy. I suggest searching the Wikipedia for "dark matter" and "dark energy", for more details about both.
The amount of matter in an object is called mass.
Density means that a specific amount (a specific mass) of material occupies a specific volume of space, and this characteristic is constant for a material throughout the universe. We measure density as mass per unit of volume.
Bagel bitesDark Matter
matter has mass and takes up space.matter
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.
It depends on the context. One would be the mass.
All matter in the universe.
Only if your the comic book guy.
Thorium constitutes about 4E-8% of the visible baryonic matter of the universe by mass. Visible baryonic matter is about 4.9% of the total mass of the universe, as per the latest estimates. So the mass-percentage of thorium in the universe would be 4E-8 x 0.049 = ... very little.
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.
All matter has mass. People, buildings, rocks, water, the air, the sun, and everything else that makes up the physical universe (except for energy) is made up of matter. Mass is defined by its resistance to change in motion, commonly called inertia.
Atoms make up most matter around us. In the Universe in general, it seems that atoms make up about 4% of the mass of the Universe. The remainder of the Universe mass is dark matter and dark energy - both of unknown composition.
It is believed that about 4% of the mass in the Universe is normal matter. About 23% is dark matter (matter of unknown composition), the remainder being something even more mysterious called dark energy. I suggest searching the Wikipedia for "dark matter" and "dark energy", for more details about both.
The amount of matter in an object is called mass.