Particle Behavior
These move faster and spread apart when thermal energy is added.
What are particles?
At Earth’s surface, water changes from solid to liquid at this temperature.
What is 0 °C (32 °F)?
Most substances become denser in this state.
What is solid?
At higher elevations, air pressure does this.
What is decreases?
While water boils, its temperature does this.
What is stays constant at 100 °C?
When water boils, this happens to the bonds between particles.
What is they break, allowing molecules to separate into the gas phase?
At higher elevations, water boils at this type of temperature (higher or lower?).
What is lower?
This common substance is the exception because its solid form is less dense.
What is water (ice)?
Lower pressure does this to the boiling point.
What is lowers it?
The energy added during boiling is used for this process instead of raising temperature.
What is breaking bonds?
Show this in a diagram: liquid molecules close together and gas molecules spread apart.
What is boiling water molecules?
Water does not need to boil to change into vapor because this happens at the surface.
What is evaporation?
Because ice is less dense than liquid water, this happens when it is placed in water.
What is it floats?
Air pressure usually does not change this property, except with ice.
What is melting point?
Scientists use this extremely cold liquid to preserve samples, cool electronics, and even in cryotherapy.
What is liquid nitrogen?