My ice-cream melted
What is the change of state during melting?
Solid to liquid
What is the freezing point of ice?
0oC
What temperature does water boil at?
100oC
What is the change of state in condensation?
Gas to liquid
Evaporation is when water gains heat and changes to _________.
water vapour
At what temperature does ice starts to melt?
0oC
When something freezes, it gains heat. True or false?
False.
When water is heated, what happens to the temperature of the water?
The temperature increases.
Condensation happens when water vapour turns into water. Does it happen because of heat gain or heat loss?
Heat loss
Evaporation is when water changes to water vapour because it loses heat. True or False?
False
What is the temperature of the melting ice called?
Melting point
Which of the following shows freezing?
1) Water boiling in a kettle.
2) Rain forming clouds.
3) Ice forming in the freezer.
4) Chocolate melting.
3) Ice forming in the freezer.
Grandma says, "Put in the fishball when the water boils." What is the temperature of the water when it starts boiling?
100oC
What process helps form clouds in the sky when warm water vapour cools down?
Condensation
Which will dry faster: a wet towel in the sun or a wet towel in a fridge?
A wet towel in the sun.
What happens to the temperature of ice during melting?
Remains the same
What happens to the temperature of water during freezing?
It remains the same.
You see bubbles rising in a pot of soup on the stove. What is happening to the water in the soup?
It is boiling. The water is changing from liquid to gas (steam).
Name one place you have seen condensation.
On a cold glass/cold can/mirror after a shower/breathing onto your spectacles
Where at home have you seen water slowly dry up and disappear?
Wet clothes drying in the sun.
A puddle on the bathroom floor disappearing.
Water in a cup left near a window getting lower.
A wet sponge drying on the kitchen sink.
You left an ice cream cone out in the sun. After some time, it started dripping. What caused the ice cream to melt?
The ice cream gained heat from the sun, causing it to change from solid to liquid state.
Jay forgot to take his packet of chocolate out of his school bag. After a hot afternoon, he opened the bag and found chocolate all over his books. What caused this to happen?
The chocolate melted because it gained heat from the warm weather, changing the chocolate from a solid to a liquid state.
Sarah placed a pot of water on the stove to cook instant noodles. After a few minutes, bubbles formed and steam started rising. What caused the water to boil?
The water gained heat from the stove, changing it from liquid to gaseous state.
What if there was no condensation in the air?
Clouds would not form, so there would be no rain.
Why do clothes dry faster when you hang them outside on a hot, windy day instead of inside your room?
The wind and the heat from the Sun increases the rate of evaporation.