States of Matter
What are the three states of matter?
They are solid, liquid, and gas.
What is the natural rock material found in rivers and streams.
It is gravel.
What is created when a solid material is mixed with water and the solid material disappears in the water?
A solution is created.
What tool would you use to separate a mixture of gravel and water?
A screen
What occurs when a substance called a reactant changes into a new substance called a product with different properties?
A chemical reaction occurs.
What happens when a solid, when heated, becomes a liquid?
It melts.
What is the name of the material used to season food and to prevent ice from forming on roadways?
It is salt.
What is the word that describes what happens when the salt disappears in a solution when mixed with water?
Dissolves
How could you decrease the concentration of a powder and water solution?
You could add more water.
What is evidence that a chemical reaction has taken place?
Gas and/or a precipitate or new substance.
What happens when water and another substance create a solution without heat?
The substance dissolves in the water.
What are the components of air?
The components of air are nitrogen, oxygen and few other substances?
In a salt and water solution, which substance is the solvent?
The water
How could you increase the concentration of a powder and water solution?
You could add more powder.
When you mix a substance with water, what are the names of three different things that you could have created?
A mixture, a solution, and/or chemical reaction.
What is the process that occurs when a liquid, when exposed to cold temperatures, becomes a solid?
The process of freezing
What is the name of the material that is actually the shell remains of tiny aquatic organisms called diatoms.
diatomaceous earth
Which substance is the solute in a salt and water solution?
The salt is the solute.
What could you use to separate diatomaceous earth and water?
A filter
What is evidence of a chemical change when two substances are mixed with water?
Bubbling, fizzing, a smell and rising and falling.
When a substance melts, what happens to the mass of the substance?
The mass stays the same.
What is the component of air that occurs naturally, but has been increasing at rates that are dangerous to plants and animals, including humans?
It is carbon dioxide.
What is the process you would use to separate water and salt?
Evaporation
What tool could you use to compare the mass of water with the mass of water with salt?
You could use a (balance) scale.
What are the two substances used to make chalk?
calcium chloride and baking soda