If the helium is confined to a fixed volume, the pressure will increase. If the volume is not constrained, the volume will increase. Because helium is such a small atom, it tends to diffuse through the walls of any container enclosing it. Increasing the temperature will also increase the rate of this diffusion since the atoms will be more energetic.
it goes up
Nothing, helium is inert.
Helium is not important for living beings.
The helium explodes into flames (which quickly die out).
Helium hasn't an effect.
They vibrate
it goes up
When heated, chlorine will dissociate into chlorine atoms and helium will remain as a noble gas. The chlorine atoms will react with any available species present in the system.
they shrink and shrivel up
It heats up
It bubbles up dummy.
When a noble gas is heated, its molecules move faster (this is the same as saying that the gas heats up).
The water gets heated up and turns into a gas
Horrible things... I am haunted by by laptop.
They get heated up, and get signals in them which make them unhealthy.
When matter is heated it will expand
Nothing, helium is inert.