Am observation involving the physical apperance of the substance or what the substance is.
100
What is physical property?
Any property of matter that doesn't change it's chemical composition.
100
What is a mixture?
Two types of atoms bound together. They can not be separated by physical means.
100
What is matter?
Anything that has mass.
100
What is density?
A physical property of a substance which is found by dividing the mass by the volume.
200
What is a quantitative observation?
An observation involving a number that was collected from the experiment.
200
What is chemical property?
The manner in which substances change structure when rearranging during a chemical change.
200
What is a compound?
A combination of two or more substances.
200
What is an element?
A substance that can not be broken down into simpler substances by chemical means.
200
Why is density important?
It can affect everything from weight to stability.
300
What is the difference between quantitative and qualitative observations?
Quantitative obserations are a number, Qualitative are a description.
300
What is the difference between physical and chemical changes?
Physical changes can be reversed while chemical can't be.
300
What is the difference between mixtures and compounds?
Mixtures can not be separated easily while compounds can.
300
What is the difference between matter and an element?
Matter can be natural or man-made, everything is matter; but an element is always natural.
300
What is the equation for finding density?
Density=mass/volume
400
Why are qualitative and quantitative observations important?
It is a goos way to ensure that the experiment has gone properly. It also allows someone who may be trying the same experiment to be sure they are getting the same results.
400
Why are physical and chemical properties important?
They help us understand how something will behave under various conditions.
400
Why are compounds and mixtures important?
Without mixtures, water and other important things would not exist. Compounds make food more exciting like trail mix and fruit salad. Steel is also a compound.
400
Why are matter and elements important?
Everything is made of matter and elements are everything natural, such as oxygen and all the metals.
400
What is stoichionetry?
A branch of chemistry that deals with the relative qualities and products in chemical reactions.
500
How are qualitative and quantitative observations similar?
They can be about the same things. For example,
qualitative: The book was heavy.
quantitative: The book wieghed 15 pounds.
500
How are physical and chemical properties similar?
They can both be used to identify an object.
500
How are compounds and mixtures similar?
They are both pure substances.
500
How and matter and elements similar?
Without elements, matter wouldn't form. Elements are the building blocks to make matter what it is.
500
What is stiochiometry used for?
To find the molar ratios between the reactants of a chemical reaction.