Heat Transfers
The three types of heat transfers
What are Radiation, Convection, and Conduction
What material allows heat to transfer easily?
Conduction
A student rolls a ball down a smooth wooden ramp and observes what happens. Then he puts sandpaper on the ramp and rolls the ball again. What is the student most likely investigating?
The effect of a change in friction on the ball's motion.
If a plane travels 45 miles in 30 seconds, what is the average speed?
1 1/2 miles per second
If a cube of frozen fruit juice is placed in a warm pan, what will most likely happen?
Heat will move from the pan to the cube.
A resort uses a solar cover to heat the swimming pool. The solar cover collects solar energy.
How is the energy from the sun transferred to the solar cover?
Radiation
Which object would best conduct thermal energy?
silver spoon
glass bottle
wood bowl
plastic cup
silver spoon
A girl lets go of her backpack, and it falls toward the ground. Which is the best explanation for why the backpack moves toward the ground?
Gravity pulls on the backpack.
Speed = Distance/Time
When does heat stop flowing between two objects?
When both objects reach the same temperature
Michael measures the temperatures of copper, silver, steel, and gold wires before and after placing them in hot water. Which idea is Michael most likely testing in his investigation?
Many types of metals are good conductors.
A worker pushes a cart full of books up a ramp. The woker removes 10 books from the cart.
How will the force the worker needs to push the cart be impacted?
The worker will need to use less force due to less mass on the cart.
Which information is needed to determine how fast a truck is traveling?
distance and time
A small beaker of liquid is placed inside a large beaker of liquid. The temperature of the liquid in the small beaker begins to increase. Which is the best explanation?
Heat flowed from the large beaker to the small beaker.
Spoons made of steel, wood, copper, and plastic, are placed in a pot of hot water. Which spoon or spoons will most likely heat up easily?
Steel and copper spoons
Four wheelbarrows with different masses are sitting in the yard. Which wheelbarrow would require the most force to make it start moving?
the wheelbarrow with a mass of 45 kg
the wheelbarrow with a mass of 35 kg
the wheelbarrow with a mass of 20 kg
the wheelbarrow with a mass of 15 kg
the wheelbarrow with a mass of 45 kg
Which object will most likely move the farthest during 1 minute?
a train traveling 16 meters per second
a racehorse running 15 meters per second
a bowling ball rolling 7 meters per second
a man swimming 2 meters per second
a train traveling 16 meters per second
A pot of soup heats on a hot plate. Which occurs as a result of convection?
Heat gets transferred throughout the soup.
A pencil falls off of a desk. What moves the pencil toward the floor?
gravity
An object is rolling along the ground. How would decreasing friction most likely affect the motion of the object (in terms of speed)?
It would increase the object's speed.