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Worksheets7th Grade Unit 1 Review
Total questions: 37
Worksheet time: 19mins
What happens to the molecules in a substance when the temperature of the substance increases?
they spread far apart in all directions
they get closer together
they start to break apart, but are pulled down due to gravity
they freeze together
When the temperature of a substance increases, the molecules move faster and spread apart in all directions. This leads to a(n) ________ in the volume of the substance.
decrease
increase
When thermal energy is added to water, the molecules break apart and spread out, forming _____.
a liquid
ice
a gas
a non-Newtonian fluid
As kinetic energy increases, temperature _____.
decreases
increases
_______ is the transfer of heat through direct touch.
convection
conduction
radiation
_______ is the transfer of heat through a liquid or a gas.
convection
conduction
radiation
_____ is the transfer of heat through electromagnetic waves.
convection
conduction
radiation
As kinetic energy decreases, temperature ______________.
increases
decreases
To increase the distance between molecules, _________ the substance.
add heat to
take heat away from
Total thermal energy depends on temperature of the substance, how many atoms in the system, and the conductivity of the material.
true
false
Which of the following would have the greatest effect on the temperature of the water?
adding a handful of ice to a cup of water
adding a handful of ice to a swimming pool
You have a large soup pot and a small sauce pan on the stove both filled with water. The burners are both turned on high. Which one will boil faster?
big pot
small sauce pan
What is the transfer of thermal energy from one object to another?
heat
temperature
kinetic energy
freezing
melting
What happens to gas molecules when thermal energy is removed?
the move faster
they spread apart
they slow down and group together
Which of the following is NOT a good conductor of heat?
iron
copper
cotton
aluminum
When exposed to a heat source, a poor conductor of heat will see _____________ in temperature.
a small increase
a great increase
a decrease
no change
When exposed to a heat source, a good conductor of heat will see _____________ in temperature.
a small increase
a great increase
a decrease
no change
When designing a new frying pan, a scientist would want a metal that was a _______.
poor conductor
good conductor
good insulator
Mrs. Loupe is installing new windows in her house. She knows that some glass can be better at keeping the heat out in the summer AND keeping the heat in during the winter. What kind of glass does she want?
glass that is a good conductor of heat
glass that is shatter proof
glass that is a poor insulator of heat
glass that is a poor conductor of heat
Mrs. LeBlanc wants to determine which material is the better conductor of heat. Each of the following materials started at 20 degrees C. She then put them in an oven to see which material held the most thermal energy. When she took them out after 15 minutes, their resulting temperatures were as follows:
Aluminum 37C
Glass 27C
Wood 21C
Stainless Steel 35C
Which one was the best conductor of heat?
Aluminum
Glass
Wood
Stainless Steel
How does heat move?
from a warmer to a cooler object
from a cooler to a warmer object
toward a hot object
away from a cold object
How is energy from the Sun transferred?
by radiation
by conduction
by convection
by the force of gravity
When you touch hot sand, heat is transferred by _________ to your skin.
conduction
convection
radiation
In which state of matter are the particles least able to move?
A
B
C
Which of these three states represents a liquid?
A
B
C
Which model represents gas?
A
B
C
Which has more energy?
Hot water
Room temperature water
Ice water
The energy that an object has because it is moving
Molecule
Refute
Density
Kinetic Energy
