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What happens when ice turns into water?
It melts
What states of change turns a liquid into a gas?
Evaporation or boiling
A liquid changes into a solid at what temperature?
The melting/freezing point
What’s the opposite of sublimation (gas to solid)?
Deposition / desublimation
What are the white lines planes leave in the sky called?
Contrails
What change of state happens when water vapor turns into liquid?
Condensation
What happens when warm air touches cold air?
Water vapour turns to liquid
What state is water in frost?
Solid
Name a solid that can change directly into a gas
Dry ice or frost
What are the three states of water?
Solid (ice), liquid (water), and gas (water vapour)
What is mist?
Tiny water droplets near the ground
What is the difference between boiling and evaporation?
Boiling happens at 100°C everywhere in the liquid; evaporation happens at any temperature, on the surface
What weather event is caused by condensation in the atmosphere?
Clouds or rain
What happens when frost disappears without melting?
Sublimation
Why do we see mist when we breathe on a cold day?
Warm air from our mouth condenses into water.
Which phenomenon occurs when tiny water droplets form close to the ground after rapid cooling?
Mist
What causes dew to form on clear nights?
The ground temperature reaches 0°C, causing moisture to condense on surfaces
What state is water in dew?
Liquid
What happens to water vapor as it rises into the atmosphere?
It condenses into tiny water droplets or ice crystals.
What state of matter is water in when it forms clouds?
Liquid
Why do contrails form behind airplanes?
Airplane fuel burns and releases water vapor, which crystallizes at high altitudes
How is frost different from dew?
Frost forms below 0°C and is solid ice, while dew forms above 0°C and is liquid water
What is the primary cause of rain?
Water droplets in clouds grow large and heavy, falling due to gravity
What forms clouds in the atmosphere?
Water vapor condenses into tiny droplets or ice crystals when it cools.
What causes hail to form inside clouds?
Strong upward winds pushing frozen water droplets back into clouds