Definitions
How Substances are Described
How Substances Interact
Density
Teachers Choice
100
This is a way of describing objects using traits that can be observed without changing it into something else.
What is a physical property?
100
These are some physical properties that you can observe with your senses. Name three.
What are color, size, shape, taste, odor, and texture?
100
These are some chemical properties of wood.
What are burning in air, reacting with air to create heat, and turning into substances like ash, carbon dioxide, and water vapor?
100
What happens if you put something in water that has less density than water ?
it floats
100
What state of matter is a crystal?
solid
200
This is a liquids resistance to flowing.
What is viscocity
200
These are some physical properties of a basketball.
What are bouncy, orange, round, and hard?
200
What is a pure substance made of atoms?
element
200
A 60-gram sample of an unknown material has a volume equal to 5 cm3 what is its density?
12 g/cm3
200
These are the elements that combine to make water molecules.
What are hydrogen and oxygen?
300
This describes the way a substance reacts with other substances.
What is a chemical property?
300
List two quantitative physical properties.
boiling point, freezing point, density
300
What is a pure substance made of molecules?
What is a compound
300
This is how we knew that a chemical reaction occurred when we combined baking soda and vinegar.
What is the fact that our balloons filled with gas and we saw the solution bubble (carbon dioxide)?
300
What state of matter has no specific shape and no specific volume?
Gas
400
This is the amount of space an object takes up
What is volume?
400
These are physical changes that can happen to water.
What are freezing, melting, evaporating, boiling, and taking the shape of its container.
400
This is a chemical property of iron when it is exposed to air.
What is combining with oxygen to form iron oxide (rust)?
400
A 54-gram sample of an unknown material has a volume equal to 20 cm3 what is its density?
2.7 g/cm3?
400
What state of matter has molecules that are tightly packed together?
Solid
500
This is a mixture that has a solute dissolve in a solvent.
What is a solution?
500
Compare and contrast chemical and physical properties.
Similar: both describe objects Different: you can't see chemical properties without changing the starting substance, while physical properties don't effect the substance.
500
Compare and contrast a homogeneous and heterogeneous mixture.
A homogeneous mixture and a heterogeneous mixture are made of compounds/elements that are not bonded together, but when you look at a homogeneous mixture you cannot see the separate pieces that make it up while the heterogeneous mixture you can see the separate pieces.
500
Explain the steps you need to take to get the density of an odd shaped solid.
1. Find the volume (place in water and measure how much the water moved) 2. Find the mass (use a scale) 3. Sub your numbers into the density equation (D=M/V)
500
Compare and contrast element and compound. Include definition, example, and what they are made of.
Elements are a group of atoms that have the same atomic number, while compounds are groups of atoms chemically bonded together. They are similar because they both are made of many atoms, but they are different because the element is one type of atom only and a compound has different types of atoms. (Examples may vary).
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