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WorksheetsEnergy Conversions Project Alternative Test
Total questions: 45
Worksheet time: 45mins
What energy transformations occur when a lump of clay is dropped?
PE to KE to Thermal energy
KE to Chemical energy to Thermal energy
KE to PE to Thermal energy
PE to KE to Elastic PE
A
B
C
D
A
B
C
D
A
B
C
D
What is the energy conversion when you burn wood for a fire?
electrical to thermal
light to kinetic
chemical to thermal
chemical to electrical
How would you describe the way molecules move when the molecules are solid?
the molecules are moving in place.
the molecules are moving around each other.
the molecules are moving away from each other.
the molecules are not moving
What happens to molecules when the temperature drops or lowers?
The molecules get closer together
The molecules start moving faster.
The molecules stop moving.
The molecules become smaller.
The smallest part of matter and makes up molecules
is an atom
is a molecule
is a gas
is matter
At 0 degrees Celsius, water _________.
evaporates
boils
freezes
remains the same
At 100 degrees Celsius, water __________________.
freezes
stays the same
evaporates
condenses
Adding HEAT to matter causes its particles to:
move faster and farther apart
Move slower and farther apart
Move faster and closer together
Move slower and closer together
Solid carbon dioxide, commonly known as dry ice, changes from solid to vapor at room temperature. Predict the change in the motion of the carbon dioxide molecules while it changes state at room temperature.
The molecules lose their energy and slide past each other.
The energy of the molecules increases, but the spaces between them decrease.
The molecules start vibrating in their positions with higher energy.
The energy of the molecules and the spaces between them increase.
Dry ice is a solid form of carbon dioxide. At about room temperature, dry ice will turn from solid directly into a gas. This process is known as
melting
boiling
evaporation
sublimation
The diagram shows the changes in state
of H2O, the chemical formula for water.
What process at Label Y is occurring?
Evaporation
Freezing
Melting
Boiling
Water puddles on a sidewalk evaporate when the Sun heats the water. Which of these BEST describes what is happening as the water evaporates?
Water changes phase as it releases heat to the environment.
Water boils as it absorbs energy from the sidewalk.
Water becomes a gas as it absorbs energy from the Sun.
Water evaporates as its thermal energy is transferred to the air.
Raphael is studying the movement of water molecules as ice changes from a solid to liquid water. Which statement best describes the changes in the movement of the water molecules as heat causes the ice to melt?
The molecules in the solid stay tightly connected and do not move. As heat is added, the molecules in the liquid move far apart and do not interact.
The molecules in the solid move freely around one another and do not interact. As heat is added, the molecules are pushed closer together and begin to interact with one another.
The molecules in the solid are in a rigid lattice and vibrate more rapidly. As the ice melts, the molecules in the liquid move more freely but are still attracted to each other and pack more tightly.
The molecules in the solid are unmoving in a rigid lattice. As the ice melts, the molecules start to vibrate, and then release from the lattice structure, moving freely as they drift farther apart to form a liquid.
Which of the following best describes the energy transformations that occur when a flashlight that runs on batteries is turned on?
chemical to mechanical to electrical to radiant
radiant to electrical to sound
chemical to radiant to mechanical to electrical
electric to radiant to chemical
What energy transformation occurs as howler monkeys loudly call to each other in the forest?
Chemical --> Mechanical --> Sound
Chemical --> Sound --> Thermal
Sound --> Chemical --> Radiant
Mechanical --> Chemical --> Sound
