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Changes
Expert Chemist
Vocabulary
Heat Transfer
Matter
100
A melting ice cube is this type of change.
What is physical?
100
Not a quiz question. This is how many natural elements make up our Earth.
What is 92?
100
These are the characteristics about an object.
What are physical properties?
100
Name the 3 indicators that a chemical change has occurred.
What is bubbling, color change, temperature change?
100
Matter is anything that has _______ and takes up ________. Fill in the blanks.
What is mass and space?
200
Name a chemical change.
What is baking soda/vinegar, elephant toothpaste (yeast, peroxide, dish soap), Alka-Selzer/water, Mentos/Diet coke, etc.?
200
92 elements are found on the name of this table. Not a quiz question.
What is the Perodic Table?
200
This is what you call a "sour" solution that can sometimes react with metals and cause a chemcial reaction.
What is an acid?
200
This type of heat is transferred by waves, often by the sun.
What is radiation?
200
Name the 3 types of matter.
What is solid, liquid, and gas?
300
Explain why mixing sugar and water is a physical change.
What is when you mix the two solutions, you can then evaporate the water and you will be left with only sugar? Because physical changes are when the substances still exist, this is a physical change.
300
Sodium Choride (NaCl) is commonly known as this. Not a quiz question.
What is salt?
300
Solid, liquid, and gas are these.
What are the 3 types of matter?
300
This type of heat transfer occurs when a hot surface heats up another surface when it is touched. In other words, heat is transferred through from one object to another.
What is conduction?
300
This type of matter has molecules that are tightly packed together, so close that they only vibrate.
What is a solid?
400
This is the difference between and physical and chemical change.
What is physical change can be turned back into its original state, but a chemical change occurs when a new solution is produced and you cannot change it back?
400
A pyrotechnic works with chemical reactions every day, because they work with these things. Not a quiz question.
What are fireworks?
400
Cork, foam, and wood are considered these, because heat does not quickly escape through these materials.
What is an insulator?
400
This type of heat transfer is when heat travels through a gas or liquid and heats up an object.
What is convection?
400
Name an object that has molecules that are free to go anywhere they want and move quickly.
What is oxygen, helium, etc.? Answer answer that is a gas is acceptable.
500
Not a quiz question. Desalination (yes from Unit 1, Natural Resources) is an example of this type of change and why?
What is phyiscal change, because by evaporating the water, only the salt is left behind? Since the salt is still salt and the water was heated to evaporate into a gas (but still exists) nothing new was created, making it a physical change.
500
This chemical or gas is produced when you mix vinegar and baking soda. Not a quiz question.
What is carbon dioxide?
500
This is what is formed when two liquids are mixed to create a solid.
What is a precipitate?
500
This type of heat transfer occurs when you use a metal spoon to eat hot soup. Explain what type of heat transfer is shown in that example and how you know.
What is conduction, because the metal spoon is a poor insulator, so when the metal spoon touches the hot soup, the heat transfers from the soup to the spoon and then into her mouth?
500
Describe the molecules of water, include how they move and what chemicals are found in water.
What is hydrogen (2) and oxygen? What is the molecules are stuck together, but are free to move to fill any shape?