When you cool them down.
When grains move closer together, eliminating spaces, they have compacted.
yep it's true. The atoms in a still object just move a lot faster and are closer together but they're moving
3 times closer
When ANY two objects move closer together, the gravitational forces between them become greater.
As it gets colder the air molecules move closer together and the balloon deflates.
the atoms in a liquid are loosely packed together. they can move, but they have to move together.
When grains move closer together, eliminating spaces, they have compacted.
yep it's true. The atoms in a still object just move a lot faster and are closer together but they're moving
3 times closer
the atoms in a liquid are loosely packed together. they can move, but they have to move together.
No, when an ice cube melts, the atoms move closer together so it seems like a smaller amount. However, it does not lose mass, the number of atoms are still the same.
No. When air cools air particles move closer together. When air warms air particles move father away from each other.
The arrangement of atoms in solids are different from those in liquids in that they are unable to move from their location in the solid, where they can move in the liquid. A solid's atoms are vibrating very rapidly, but the molecules are all locked into place, whereas in a liquid the molecules are free to move around. Also in general the atoms of a solid are closer together than those of a liquid with the exception of water, whose solid form is less dense.
-- increasing the mass of either object -- allowing them to move closer together
No. They move closer together so they can share what little heat they have.
they move away from each other!
As you move them closer and closer together, the repellent force between them will get stronger and stronger.