Conductors and Insulators
Heat Transfer 1
Heat Transfer 2
Conservation of Mass/Matter
Physical Vs. Chemical Changes
5000
Which is a better conductor?
Metal is a better conductor.
5000
Radiation is when _____________ waves travel through space, without direct contact.
electromagnetic
5000
Heat moves from the _____ object to the ______ object.
hotter ; cooler
5000
What is the Law of Conservation of Mass/Matter?
It's a law that states that matter/mass is never created or destroyed in any physical or chemical change.
5000
Ripping up paper
Physical Change
6000
Warm clothes prevent you from losing heat through radiation. Are they insulators or conductors?
insulators
6000
The transfer of heat energy from the sun to Earth.
Radiation
6000
The current of hot magma rising and cool magma sinking.
Convection
6000
If I have 100 grams of ice in a cup and then the ice melts into liquid water, what is the mass of the water?
100 grams
6000
Candle wax melting.
Physical Change
7000
Are styrofoam coffee cups insulators or conductors?
Insulators. They don't conduct heat.
7000
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.
7000
What method of heat transfer is this?
Conduction (energy transfer via contact)
7000
Tommy mixes 30 grams of sugar into 150 grams of tea. What is the mass of the solution?
180 grams
7000
Cooking an egg in a frying pan.
Chemical change
8000
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.
8000
What method of energy transfer is this?
(Description: Heat flows from the hotter cup into the cooler hands. )
Conduction (energy transfer via contact)
8000
What method of heat transfer is shown in the photo?
It is showing heat radiation and how the mesh over the rabbit is an insulator blocking the transfer of heat from the rabbit.
8000
I left my bicycle out in the rain. The mass of the bicycle chain is 200 grams. After several days, rust has formed on the bicycle chain. If the chain now has a mass of 180 grams, what is the mass of the rust?
20 grams
8000
If a new substance is formed, it is a.....
Chemical change
9000
Explain why a metal spoon feels warmer than a plastic one in the same cup of hot tea. Use the terms insulator and conductor.
The plastic spoon is an insulator, so it does not conduct heat from the tea. The metal spoon is a conductor and it will absorb the heat from the tea, making it feel warmer.
9000
What method of heat transfer is shown here?
Convection heating (hot fluid rises, cool fluid sinks)
9000
Describe an example of radiation.
Answers will vary. The warmth we feel from a fire.
9000
Jemma is burning some firewood. She has 10 Kg of firewood before she burns it. After it has burned and turned into ash, she measures the mass of the ash and it is 8 Kg. What happened to the original mass of the wood?
When the fire burned the wood, the products are ash and carbon dioxide gas that was released into the atmosphere.
9000
If Jimmy mixed water and salt together and made a solution of salt water, this was a .......
Physical change because the salt and water are still there in the product and can be separated using evaporation.
10000
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.
10000
What are two different words we use to describe temperature?
Kelvin, Celsius or Fahrenheit
10000
Describe an example of convection.
Answers will vary. The convection currents in the ocean and atmosphere.
10000
I am conducting an experiment. The mass of my beaker is 25 grams. I put water and salt into the beaker. The salt has a mass of 10 grams. The total mass of the beaker, salt and water is 75 grams. What is the mass of the water?
40 grams
10000
What are two signs that a chemical change has taken place?
Odor, color change, bubbles, temperature change