Science Ch.3 Questions
How does heating a gas in a rigid container change its pressure?
Heating a gas in a rigid container changes its pressure because when a gas is heated at constant volume the particles move quicker and collide more with the each other and the side of the container, therefore increasing pressure.
Why are both liquids and gases called fluids?
Liquids and gases are both called fluids because a fluid is "a substance that flows" and both liquid and gas particles move around freely.
Compare and contrast liquids with a high and low viscosities.
Liquids with a low viscosity like water and vinegar flow quickly while honey and syrup have a high viscosities which means they flow slowly.
Describe the motion of particles in a solid.
The motion of particles in a solid is vibrating but staying in the same place, like a group of people running in place.
How is the thermal energy of a substance related to its physical state?
Thermal energy of a substance is related to its physical state because a substance changes solid to liquid and liquid to gas when its thermal energy increases.
What happens to gas particles when the air in an inflated ball leaks out?
When the air in an inflated ball leaks out the gas particles pressure inside the ball decreases and there is a lower concentration of gas particles inside the ball.
What happens to water molecules when water is heated from a 90 degree Celsius to 110 degrees Celsius?
When water molecules are heated from a 90 degrees Celsius to 110 degrees Celsius the water increases energy and boils to become a gas.
Define a solid.
definite shape, definite volume, closely packed particles
Making ice cubes from a liquid is an example of?
freezing
Describe four examples of changes in state.
melting- the change in state from a solid to a liquid when a solid reaches its melting point freezing- the change of state from a liquid to a solid when a liquid reaches its freezing point boiling- the change of state when a liquid forms into a gas because vaporization takes place below surface and at the surface sublimation- occurs when the surface particles of a solid gain enough energy that they form a gas
