Phase Changes

Group the examples based on their correct category!

Groups:

(a) 🌞 Melting (Solid → Liquid)

,

(b) ❄️ Freezing (Liquid → Solid)

• Gelatin freezes and becomes firm.

• Melted chocolate freezes back into a chocolate bar.

• Water freezes into ice in the freezer.

• Butter melts on a hot pan.

• Wet clothes freeze outside on a very cold day.

• Candle wax melts when the candle burns.

• Ice cubes turn into water.

• Juice freezes into popsicles.

• Melted butter hardens in the refrigerator.

• Snow melts on a warm day.

• Soup freezes when kept in the freezer.

• Lava cools and freezes into rock.

• Frozen juice melts into a drink.

• Cheese melts on a pizza in the oven.

• Rainwater freezes into ice on the road.

• Candle wax hardens after the candle is turned off.

• Metal melts in a factory furnace.

• Ice cream melts when left outside the freezer.

• Chocolate melts in your hand or under the sun.

• Crayon melts when near a candle flame.

Group the examples based on their correct category!

Groups:

(a) 🌬️ Evaporation (liquid -> gas)

,

(b) ☁️ Condensation (gas -> liquid)

• Water on leaves dries after rain.

• Water drops form on a cold glass of water.

• Steam turns to water on a cold wall.

• Water appears inside a plastic bag after it’s tied and left under the sun.

• Drops of water form on windows when it rains outside and it’s warm inside.

• Wet clothes dry under the sun.

• Water in a puddle disappears on a hot day.

• Fog appears on car windows in the morning.

• Water forms on the outside of a soda can.

• Water in an open glass slowly gets less and less.

• Water in a kettle changes into steam.

• Dew forms on grass early in the morning.

• Bathroom mirror fogs after a hot shower.

• The floor dries after mopping.

• Clothes dry faster when the wind blows.

• Water vapor turns into clouds in the sky.

• Steam turns into water drops on a mirror.

• Sweat on our skin disappears when it’s hot.

• Sea water turns into vapor to make clouds.

• Hair dries after swimming.

Group the example based on their correct category!

Groups:

(a) 🌫️ Sublimation (solid to gas)

,

(b) 🌨️ Deposition (Gas to Solid)

• Dry ice (solid carbon dioxide) changes into gas and makes “smoke.”

• Air freshener blocks slowly disappear.

• Water vapor in cold air turns into snowflakes.

• Ice crystals form inside the freezer walls.

• Frost forms on cold car windows.

• Frost appears on grass on a cold morning.

• Ice cubes in the freezer get smaller even without melting.

• Frost forms on house roofs at dawn.

• Mothballs (kapur barus) disappear in the cupboard.

• Snow changes directly into vapor on a sunny day.

• Frost appears on tree branches in winter.

Match these!

• is a change from solid to gas

• Evaporation

• is a change from liquid to gas

• Sublimation

• is a change from gas to liquid

• Melting

• is a change from solid to liquid

• Freezing

• is a change from liquid to solid

• Condensation

What process happen here?

What process happen here if we put the water into the freezer?