6. It takes place when the particles between objects that are in contact
vibrate and collide at different speeds due to the difference in their
temperature.
A. conduction
C. radiation
B. convection
D. insulation
7. When a metal spoon with a temperature of 20 °C is placed into a cup
of water with a temperature of 90 °C the spoon will heat up. This is
an example of
A. conduction
C. radiation
B. convection
D. insulation​