# Energy: Heat And Matter Topic Test

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_____________is the thermal energy that flows from one substance to another when the substances differ in temperature.
Heat
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Isaac wants to make s'mores. He holds a marshmallow on a metal skewer over a fire. A few seconds later, the marshmallow is cooked and the skewer feels warm. What most likely happened?
Thermal energy in the form of heat moved from the fire to the skewer and marshmallow.
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Shelly tells a friend that her computer needs to be fixed because it has been producing a lot of heat and is smoking. Where is the error in her statement?
Her computer is producing thermal energy, not heat.
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Which best explains why water boils in a pot sitting over fire?
Thermal energy from the fire moves to the water in the form of heat.
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If a cup of coffee is at 90Â°C and a person with a body temperature of 36Â°C touches it, how will heat flow between them?
from the cup to the hand
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Heat flows from_________________substances.
hot to cold
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A stovetop burner on medium reaches 200Â°C. Which other objects will heat from the burner flow to? Check all that apply.
Incorrect recheck all that applies: the surrounding air * a cool pan* a pan heated to 223Â°C cool water inside a pan someone who touches it*
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What must be true about two objects if heat is flowing between them?
The objects must be different temperatures.
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Which substance is most likely to heat up the fastest?
copper (specific heat of .39 /g â€¢ CÂ°)
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The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?
They must be cooler than the air inside the house.
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How do the metal aluminum coils in an air conditioner help keep a house cool?
They insulate the house from outside thermal energy. "NC" They conduct thermal energy from inside the house and release it outside the house. They insulate the surrounding air from indoor thermal energy. They conduct thermal energy from outside the house and release it inside the house.
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When Object 1 came into contact with Object 2, Object 2 got warmer. What can be concluded about the objects before they came into contact with each other?
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How does a foam-filled winter coat help keep a person warm?
It slows down the transfer of thermal energy from outside to inside the coat. "NC" It slows down the transfer of thermal energy from inside to outside the coat. It speeds up the transfer of thermal energy from outside to inside the coat. It speeds up the transfer of thermal energy from inside to outside the coat.
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Which describes how fast-moving particles assist in transferring thermal energy to a cup after hot tea is poured into it?
They collide with slow-moving particles.
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What must be true about two objects for conduction to take place?
The objects must be different temperatures and they must be in contact.
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Conduction can occur within a single substance, but parts of the substance must have which property?
different temperatures different textures different particle sizes "NC" different colors
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Conduction involves the transfer of electric charge or
thermal energy
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What occurs when someone places an ice pack on an injured ankle?
Heat from the ankle is transferred to the ice pack.
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In which areas of the diagram does conduction occur?
X and Z
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Which contains the particles that are vibrating fastest?
boiling water
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The diagram shows the sun's interior. Convection currents are present in the convection zone. Which best describes how fluids change as they travel through different portions of the convection currents?
They become more dense at the outer portion of the convection currents
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Which area of Earth is most similar to the sun's convection zone?
the mantle
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Yami pours powdered cocoa mix into milk and stirs it. Then she microwaves the mixture for three minutes. When she takes the cup out, the handle is very warm. Steam rises from the cup, so she blows it before taking a sip. In which part of this scenario can convection be best observed?
rising steam from the cup of cocoa
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The diagram shows how air circulation forms a sea breeze on a warm day. Which best describes what is happening in the diagram?
At point 4, thermal energy from warm air over the land is transferred upward toward cooler areas of the atmosphere
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Water is boiling in a clear pot, as shown in the picture. Which takes place as water cycles from the bottom of the pot toward the top?
Thermal energy is transferred.
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Which best describes the shape of a convection current?
circular
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When Xavier places his hands near a light bulb, he notices that certain areas around the light bulb are warmer than others. Which best explains this?
The area directly above the light bulb is warmest because of convection.
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A student places a large pot of cold water on a stove and heats it for one minute. Then she takes the pot of water off the burner and places it on the counter. Which best describes the convection currents?
After the stove is turned off, convection currents continue to transfer energy through the water for a period of time
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Convection only occurs in
fluids
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The lava lamp has a light bulb as a heat source at its base. The lamp contains a colored, waxy fluid that can be observed moving in clumps through a clear liquid. Which indicates that the clump of waxy fluid at the center of the lamp is moving downward rather than upward?
Its temperature increases before it decreases again.
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Which best describes the shape of a convection current?
circular
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Where could convection currents form? Check all that apply.
in a freshwater lake in the atmosphere in Earth's mantle
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Which is required for convection to occur?
a heat source
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Which best describes convection?
It relies on the collision of particles within or between substances. It occurs in solids, liquids, or gases that are heated."NC" It results when portions of a liquid cool and rise. It is driven by temperature differences within a fluid.
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Which best describes the convection currents in Earth's mantle?
They transfer thermal energy away from Earth's core toward its crust.
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How does radiation help treat cancer?
It heats up the cancer cells and weakens them.
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drying paint
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A diagram that shows thermal energy being released by objects is called a
electromagnetic wave "nc"
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Which material most likely gets the warmest when placed in the Sun?
white cement beige sand brown mulch yellow pebbles "nc"
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A thermogram of a house shows high amounts of thermal energy around the windows but not around the roof. Which conclusion is best supported by the thermogram?
The windows take in a lot of solar radiation. The roof takes in a lot of solar radiation. "nc" The windows are not energy efficient, but the roof is. The roof is not energy efficient, but the windows are.
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A(n) _______ is a material that causes a wave to bounce off of it.
reflector
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The owner of a window-treatment company wants to design shades that will cover the windows of a house. The shades should also warm the house by maximizing the absorption of solar energy coming through the windows. Which kind of material would best accomplish this task?
black and textured
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Why is thermal energy from the Sun transferred to Earth through electromagnetic waves instead of any other type of thermal energy transfer?
Electromagnetic waves can travel through empty space.
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A farmer places unhatched chicken eggs under a heat lamp. How does the radiation help the eggs?
It keeps the eggs warm until they hatch.
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Which energy change occurs during boiling?
Heat energy is absorbed by the substance.
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Jean has a sample of a liquid. If she changes the liquid's phase by _________ it, the molecules will spread out, allowing the sample to expand and fill a container of any shape or volume.
evaporating
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Which example involves a phase change in which heat energy is released by the substance?
freezing ice cream
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When does carbon dioxide absorb the most heat energy?
during sublimation
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A gaseous substance turns into a solid. Which best describes this change?
A substance that has no specific volume changes to a substance that has a specific volume.
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Which is the correct order of materials in terms of reflectivity, from least to greatest?
black asphalt, brown soil, beige sand, white paper
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Which indicates that thermal energy is no longer being transferred from boiling water to a mug?
The water and the mug are the same temperature.
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For conduction to occur, particles must be
in contact
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Consider the statement below. "When nitrogen is liquefied, heat is released." Is this statement true or false?
It is true because heat is released when a gas changes to a liquid
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A solid substance turns into a liquid. Which best describes this change?
A substance that has a specific shape and volume changes to a substance that has a specific volume.
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Which statement best describes heat and thermal energy?