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Students placed a balloon with air in the freezer for several hours. What will they observe when they take the balloon out?
Gold atoms
Gas
Compound
Liquid
Moved fast enough to escape the liquid
The balloon had shrunk
They help prevent cracking when the cement is heated
Several hundred years as many scientists worked on it.
A decrease in the temperature of a gas would cause a change to which of the following phases first?
Gold atoms
Gas
Compound
Liquid
Moved fast enough to escape the liquid
The balloon had shrunk
They help prevent cracking when the cement is heated
Several hundred years as many scientists worked on it.
What do scientists call a substance that is made of two or more elements?
Gold atoms
Gas
Compound
Liquid
Moved fast enough to escape the liquid
The balloon had shrunk
They help prevent cracking when the cement is heated
Several hundred years as many scientists worked on it.
What is a pure lump of elemental gold made of?
Gold atoms
Gas
Compound
Liquid
Moved fast enough to escape the liquid
The balloon had shrunk
They help prevent cracking when the cement is heated
Several hundred years as many scientists worked on it.
What happens to molecules of a liquid when it turns to gas? The molecules have:
Gold atoms
Gas
Compound
Liquid
Moved fast enough to escape the liquid
The balloon had shrunk
They help prevent cracking when the cement is heated
Several hundred years as many scientists worked on it.
An increase in temperature of a liquid causes it to change to which phase?
Gold atoms
Gas
Compound
Liquid
Moved fast enough to escape the liquid
The balloon had shrunk
They help prevent cracking when the cement is heated
Several hundred years as many scientists worked on it.
Sidewalks have cracks that are imprinted every meter or two. What is the purpose of these cracks?
Gold atoms
Gas
Compound
Liquid
Moved fast enough to escape the liquid
The balloon had shrunk
They help prevent cracking when the cement is heated
Several hundred years as many scientists worked on it.
An understanding of the structure of an atom has been developed. How much time did it take to do?
Gold atoms
Gas
Compound
Liquid
Moved fast enough to escape the liquid
The balloon had shrunk
They help prevent cracking when the cement is heated
Several hundred years as many scientists worked on it.
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