WorksheetsENERGY TRANSFER AND CONDUCTIVITY
Total questions: 20
Worksheet time: 10mins
__________ is a type of system that does not exchange matter or energy from its environment.
open system
all systems
no system
closed system
There are three ways energy could be transferred. Which one is not included.
conduction
radiation
convection
temperature
What does this diagram show?
specific heat of substances
how thickness affect transfer of energy
thermal equilibrium is reached
thermal absorption
Thermal energy transfers _______________________.
when temperatures are equal.
from higher temperature to lower temperature.
from lower temperature to higher temperature.
because both objects have high temperatures.
(a) is transfer of thermal energy through a space [vacuum] using electromagnetic waves.
(a) is thermal energy transfer that occurs in liquids and gases. It involves rising of warmer particles and sinking of cooler particles.
(a) is thermal energy transfer that occurs in objects that are in contact with each other.
It measures the radiation given off by objects. What is it?
(a)
___________ is the ability of a material to conduct heat.
specific heat
thickness
surface area
conductivity
The substance with more mass takes more energy from the surroundings to increase the kinetic energy of the particles. This relationship is called _______________.
directly proportional
inversely proportional
not proportional
high proportion
The data below shows that when the amount of energy added is constant, mass is (a) to the conductivity of the substance.
Which is NOT a characteristic of copper?
It heats up quickly and loses heat slowly.
It heats up and loses heat quickly.
It is a conductor.
It has low specific heat.
Insulators have ___________________.
high specific heat and low conductivity.
high specific heat and high conductivity.
low specific heat and low conductivity.
low specific heat and high conductivity.
Which factors affect the conductivity of a material?
specific heat
thickness
surface area
all of the above are correct
How will you decrease the conductivity of a bowl of water?
increase its surface area
decrease the surface area
keep the surface area the same
add more water
Convection current is formed when warmer air mass rises and __________________.
cooler air mass sinks.
cooler air mass scatters.
cooler air mass moves in all directions.
cooler air mass goes in the same direction with warmer air mass.
Which one does not belong to the group?
copper wire
aluminium pot
wooden ladle
silver spoon
(a) is a type of system that exchanges matter and energy to its environment.
Which type of heat transfer does not occur in solids?
radiation
convection
conduction
all of them
Why does the seashore heats up faster than the sea during daytime?
Because materials that make up the land has low specific heat and low conductivity.
Because materials that make up the land has high specific heat and high conductivity.
Because materials that make up the land has high specific heat and low conductivity.
Because materials that make up the land has low specific heat and high conductivity.
