States of Matter
Phase Changes
Molecules
Energy
Real-Life Science
100
Which state of matter keeps its own shape?
Solid
100
Solid → Liquid is called...?
Melting
100
Which molecules have more kinetic energy?
A. Slow-moving
B. Fast-moving
B. Fast-moving
100
Energy transfers from...
A. lower temperature → higher temperature
B. higher temperature → lower temperature
B. higher temperature → lower temperature
100
A puddle slowly disappears on a warm day. What happened?
Evaporation
200
Which state of matter takes the shape of its container but keeps the same amount of space?
Liquid
200
Liquid → gas is called...?
Evaporation
200
If temperature increases, what usually happens to molecular motion?
It increases / molecules move faster.
200
A 25°C block touches 0°C ice. Which way does energy move?
Block → ice
200
Why does spreading water across a wide tray make it evaporate faster?
More surface area is exposed.
300
Which state of matter has particles that are spread out and move freely?
Gas
300
Gas → liquid is called...?
Condensation
300
Which liquid has the higher temperature? 
B
300
Two blocks are the same temperature. Ice melts faster on the metal block than the foam block. Why?
The metal transfers energy to the ice faster.
300
Why did water form outside our cold cup?
Water vapor in the air cooled and condensed from gas to liquid.
Energy was transferred to the colder cup.