States of Matter
What are the three main states of matter on Earth?
solid, liquid, gas
What do we call the process when ice turns into water?
melting
When water boils, is heat being added or removed?
added
What phase change happens when puddles disappear on a hot day?
evaporation
Name one everyday example of water as a solid.
ice cubes
snow
icicles
frost
Which state of matter has a definite shape a volume?
solid
What is the process called when water turns into vapor?
evaporation or boiling
When water freezes, is heat being added or removed?
removed
What phase change happens when dew forms on grass in the morning?
condensation
Name one everyday example of water as a gas.
steam from boiling water
water vapor in the air
Which state of matter takes the shape of its container but has a definite volume?
liquid
What do we call the process when gas turns back into liquid?
condensation
Does evaporation require adding or removing heat?
adding heat
Why does the bathroom mirror fog up after a hot shower?
Condensation of water vapor on the cooler mirror surface.
Name two processes where heat is removed.
freezing/crystallization
condensation
Which state of matter has neither a definite shape nor volume?
What is it called when liquid water turns into ice?
freezing
True or False: Condensation requires adding heat.
False, it removes heat.
Which state of matter are clouds mostly made of?
Tiny liquid water droplets.
Name two processes where heat is added.
melting
evaporation/boiling
Which state of matter has particles that move the fastest?
gas
Which two phase changes occur when particles move faster?
melting and evaporation
Explain how energy is involved in melting ice.
Heat is added to speed up the molecules which move freely as liquid.
When you put a bottle of water in the freezer, what phase change happens?
freezing, liquid to solid
Describe the full cycle of how water can move from the ice phase to the gas phase and back.
ice melting - water boiling/evaporation - water vapor condensation - water freezing/crystallization