the study of the properties of matter and how matter changes
What is chemistry?
100
roasting a marshmallow
What is a chemical change
100
when you mix baking soda and vinegar together, these 2 types of evidence occurs
What is gas production and change in temperature?
100
anything that has mass and occupies space
What is matter?
100
a characteristic of this substance is that the parts of it keep their own properties, and can be easily separated
What is a mixture or solution?
200
a substance that cannot be broken down into any other subsances by chemical or physical means
What is an element?
200
melting chocolate
What is a physical change?
200
when you cut a peach, and leave it uncovered, this form of evidence occurs
What is a color change?
200
a particle made of two or more atoms bonded together
What is a molecule?
200
have different properties than the elements that make them up
What are compounds?
300
consists of two or more pure substances that are in the same place but are not chemically combined
What is a mixture?
300
carbon, nitrogen, calcium, potassium
What are elements?
300
the leaves in the fall
What is a color change?
300
a mixture that has individual substances that are not easily seen
What is a solution?
300
hydrogen peroxide, vinegar, baking soda, salt, sugar are all types of
What are compounds?
400
a change that alters the form or appearance of a material
What is a physical change?
400
name the elements and number of atoms of each element found in carbon dioxide
What is one atom of carbon and 2 atoms of oxygen? (CO2)
400
wood burning - name 2 forms of evidence that a chemical reaction is occuring
What is a change in temperature, a change in properties, a color change, gas production.
400
the force that holds atoms together
What are chemical bonds?
400
the difference between an atom and a molecule
What is an atom is the smallest particle of an element; a molecule is 2 or more atoms combined?
500
the smallest particle of an element
What is an atom?
500
name 4 of the 5 forms of evidence for changes in matter
What is: color change; precipitation; gas production; changes in temperature; changes in properties?
500
the only sure evidence for a chemical reaction is
What is a new substance is formed?
500
a solid that forms from solution during a chemical reaction
What is a precipitate?
500
the difference between a physical change and a chemical change?
What is a physical change causes a change in the appearance of a substance, but a chemical change causes a new substance to be formed? Should also include an example of each.