Heat Transfer
What form of heat transfer takes place in a boiling pot of water?
a) convection
b) conduction
c) radiation
a) convection
Which best explains how ice melts in a person's hand?
a) the heat from a person's hand transfers to the ice cube by radiation
b) the heat from a person's hand transfers to the ice cube by conduction
c) the cool temperature of the ice transfer by radiation to the person's hand
d) the cool temperature of the ice transfers by conduction to the person's hand
b) the heat from a person's hand transfers to the ice cube by conduction
On a hot day in the sun, why does Robert use a foam can holder to keep his drink cool?
a) foam insulates a cold drink
b) foam reflects cold air from the sun off the can
c) foam reflects heat from the sun off the can
d) foam conducts heat between the can and the air
a) foam insulates a cold drink
A plastic bottle of water was placed into the freezer. The next day, it is taken out of the freezer. What MOST LIKELY happened to the water and the plastic bottle overnight?
a) the water changed to a gas, the bottle shrunk
b) the water changed to a solid, the bottle expanded
c) the water changed to a gas, the bottle was empty
d) the water changed to a solid, the bottle was empty
b) the water changed to a solid, the bottle expanded
Which best describes the flow of heat?
a) from larger objects to smaller objects
b) from a warmer object to a cooler object
c) from a cooler object to a warmer object
d) from smaller objects to larger objects
b) from a warmer object to a cooler object
Which best explains why the sun's rays will warm a lake?
a) conduction
b) convection
c) radiation
c) radiation
Which would most likely turn a gas to a liquid?
a) cooling
b) boiling
c) warming
d) freezing
a) cooling
Joann fries an egg each morning in a metal frying pan with a rubber-coated handle. Which best explains why the handle of the frying pan is cated in rubber?
a) rubber makes the pan lighter
b) rubber makes the pan prettier
c) rubber is cheap to manufacture
d) rubber is a poor conductor of heat
d) rubber is a poor conductor of heat
An unlit candle was laid on a table directly in front of a hot fireplace. Which MOST LIKELY explains why the candle melted?
a) heat energy from the fire was radiated through the air and to the candle
b) heat energy from the fire was conducted through the table and to the candle
c) heat energy from the fire was radiated through the floor and to the candle
d) heat energy from the fire was conducted through the air and to the candle
a) heat energy from the fire was radiated through the air and to the candle
Which color reflects heat radiation best?
a) red
b) blue
c) white
d) black
c) white
Which is an example of something that transfers heat by radiation?
a) the sun
b) a stove
c) hot air balloon
d) wind currents
a) the sun
Which best describes an effect of boiling a pot of water?
a) the boiling water changes color
b) the boiling water produces steam
c) the boiling water cools more quickly
d) the boiling water changes into a solid
b) the boiling water produces steam
Which is the best conductor of heat?
a) a glass tube
b) a copper wire
c) a piece of string
d) a piece of wood
b) a copper wire
Lee is making simple syrup by dissolving sugar into water. Which action will most likely cause the sugar to dissolve more quickly?
a) heating the water
b) cooling the water
c) increasing the amount of sugar
d) decreasing the amount of water
a) heating the water
Which shows an example of convection?
a) Jose cooks an egg in a pot of boiling water.
b) Clara burns her hand by touching a light bulb.
c) Lucy wraps herself in an electric blanket to get warm.
d) Ben holds the end of a metal rod in fire to cook hot dogs.
a) Jose cooks an egg in a pot of boiling water.
What conditions are necessary for heat conduction to occur between two objects?
a) the objects must be surrounded by air or water
b) two objects at different temperatures, touching one another
c) two objects at different temperatures are located far from one another
d) one object must be in hot water, one must be in sunlight
b) two objects at different temperatures, touching one another
Anya placed an ice cube on the sidewalk on a warm day. The ice cube soon melted to form a puddle. What process caused the melting?
a) heat transferred by convection
b) heat transferred by radiation
c) heat transferred by conduction
b) heat transferred by radiation
Mark is designing a dog house. Which material would he use if he wanted to keep the dog house as cool as possible?
a) black metal
b) reflective plastic
c) light colored steel
d) dark cement blocks
b) reflective plastic
People sitting around a campfire area able to feel the heat from the fire. How are the people able to feel the heat from the fire without touching the fire?
a) the heat from the fire travels through the ground and heats the ground around the people
b) the heat from the fire is conducted through air models to the people
c) the heat from the fire rises in the air then settles around the people
d) the heat from the fire radiates from the fire to the people
d) the heat from the fire radiates from the fire to the people
Water expands when it freezes. Which best describes an example of this characteristic?
a) water can move dirt in a river
b) water pipes can burst in the winter
c) water puddles evaporate in the sun
d) water combined with a powder makes a gelatin
b) water pipes can burst in the winter