What is a way to describe how a substance reacts with other substances?
100
Physical Change
What is a change in one or more physical properties?
100
A mixture
What forms when two or more substances are mixed together but their atoms are not combined?
100
A substance that cannot be broken down into other substances by heat, light, or electricity
What is an element?
100
What is a molecule?
When two or more atoms are joined together.
200
May have an odor, irreversible, change color, produce energy or light, bubbling because the release of gas
What are indicators of a physical change?
200
It can freeze or melt
What is a physical change of water?
200
Molecules are not joined together in a mixture
True
200
Reasons why an element is often called "building blocks"
Each element is like a letter of the alphabet. The letters can combine to form words. In a similar way elements can combine to make up different kinds of matter.
200
Why is an oxygen molecule not a compound?
It is only made up of one type of atom.
300
It can burn in air, reacts with oxygen in the air, creates heat as it changes into other substances
What are chemical properties of wood?
300
texture, shape, size, color, odor, volume, weight, and density
What are physical properties?
300
How can you separate the parts of a solution?
Let the water or other liquid evaporate
300
A particle in a atom that has a negative charge.
What is an electron?
300
What are elements of water?
Two parts Hydrogen to 1 part oxygen
400
How can you use chemical properties to tell gold and pyrite apart?
Puts drop of acid to see if pyrite reacts to produce a gas, hydrogen sulfide
400
What are examples of a physical change?
Creation or separation of a mixture, (including homogeneous mixture)
Physical deformation (cutting, denting, stretching, etc.)
Physical relocation (moving an object)
400
In a ________ the parts are spread out evenly.
What is a solution?
400
What are three pieces of information that would appear in each small block on the periodic table?
What is elements name, its symbol, number of protons, number telling its position on the periodic table
400
Compare and Contrast a molecule with an atom. How are they alike or different?
Molecules are formed of atoms joined together and are the smallest parts of many substances. Atoms are the smallest particles of an element.
500
Forms new substances such as carbon dioxide
What is the chemical reaction that occurs when baking soda and vinegar are combined?
500
T?F
Water boiling is an example of a physical change.
True
500
Sand and iron fillings together can make up a ____________.