Changes of state — melting, freezing, evaporation and condensation
P4 Science · Cycles in Matter and Water · 203 questions · difficulty D1–D5 · Singapore MOE-aligned
Sample questions
SAMPLE 1
A block of ice cream left on a plate at room temperature for 30 minutes turns into a puddle of liquid. What process causes this change?
A Melting
B Freezing
C Evaporation
D Condensation
SAMPLE 2
A puddle of water on a sunny playground disappeared after 3 hours. Which process caused the water to disappear?
A Evaporation
B Condensation
C Melting
D Freezing
SAMPLE 3
Aunty Mei placed a tray of water in the freezer at 8 a.m. The water started turning into ice at 10 a.m. and was completely frozen by 11 a.m. What is the total time taken for the water to freeze completely?
A 3 hours
B 2 hours
C 1 hour
D 4 hours
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