Conductors and Insulators
Heat Transfer 1
Heat Transfer 2
Physical/Chemical Change
Water Cycle
100
Which is a better conductor?
Metal is a better conductor.
100
Feeling warmth from a campfire.
Radiation
100
Heat moves from the _____ object to the ______ object.
hotter ; cooler
100
List an example of a physical change.
Breaking a pencil, clipping your fingernails, bending a piece of paper. Anything that can be reversed.
100
What is when plants release water into the atmosphere?
Transpiration
200
_____ are materials that absorb heat easily.
Conductors
200
What method of heat transfer is shown here?
Convection heating (hot fluid rises, cool fluid sinks)
200
What is an example of convection?
A. Warm cookies on a plate
B. Heated seats warming your back in the car
C. A radiator heating the air in your home
D. The sun is heating the surface of the ocean
C. A radiator heating the air in your home
200
What is a clue that a chemical change is happening?
New Substance, not easily reversed, color change, temperature change, forms a gas
200
After a rain, a puddle of water remains on a sidewalk. After a day of sunshine, the puddle is gone. Which process is most responsible for the disappearance of the puddle?
Evaporation
300
Are styrofoam coffee cups insulators or conductors?
Insulators. They don't conduct heat.
300
Do the molecules in a cube of ice move or are they completely still?
They still move a little. Cool things still have heat energy that moves the molecules.
300
When an object is COOLED the atoms ____ ____ causing the object to ____
slow down, CONTRACT
300
Which state of matter is the least dense?
A. Solid
B. Liquid
C. Gas
C. Gas
300
Which term best describes the flow of water over land?
Runoff
400
What is the definition of an insulator? Provide one example of an insulator.
An insulator is a material that does not conduct heat well. Wool socks are an insulator.
400
What method of energy transfer is this?
(Description: Heat flows from the hotter cup into the cooler hands. )
Conduction (energy transfer via contact)
400
Radiation is when _____________ waves travel through space, without direct contact.
electromagnetic
400
What do particles in matter do when heat is removed?
They slow down and contract
400
A student gets a can of soda from the refrigerator. There is a thin film of moisture on the surface of the can. Which best describes the source of the moisture?
Water from the air condensed on the can.
500
Wax is a conductor because it quickly absorbs heat.
True/False
True
500
When an object is HEATED the atoms ______ ______ causing the object to ______
Move faster, expand
500
Describe an example of radiation.
Answers will vary. The warmth we feel from a fire.
500
Jason poured 500 grams of water into a container and tightly sealed it. The water was allowed to freeze. Which is most likely true about the ice that formed?
The mass of the ice is the same as the mass of the water.
500
What is the opposite of condensation?
Evaporation
600
Explain one example of a conductor and one example of an insulator you use while cooking.
An oven mitt, rubber-coated handles on pans and pots, and rubber and plastic utensils are all examples of insulators. Pots, pans, and metal baking sheets are all examples of conductors.
600
Explain why it’s much colder at the bottom of a pool than at the top. Also, describe what heat transfer processes are taking place.
Convection makes the cool water sink and hot water rise. Radiation heats the surface of the water and may not penetrate down to the bottom.
600
Describe an example of convection.
Answers will vary. The convection currents in the ocean and atmosphere.
600
Which change would result in a new substance being formed?
A. Sugar dissolving in water
B. metal rusting
C. glass breaking
D. ice melting in a bowl
B. Metal rusting
600
When Maria went for a walk early in the morning, she noticed the ground was wet. It had not rained overnight, but there were water droplets on the grass. What best explains why the water droplets formed on the grass?
Condensation