Atoms/Particles
What are the 3 sub-atomic particles that make an atom
Protons, Neutrons, Electrons
Which pure substance is made up of only one type of atom?
Element
What phase change goes from a solid to a liquid
Melting
True or false: Color is a chemical property
False. We can observe color without changing anything.
Where do natural/raw materials come from?
nature
Define matter
an object that has mass and takes up space (volume)
Give an example of a molecule
Answers may vary. H2, O2, H2O, NaCl are some common ones
Which phase change goes from a liquid to a solid?
Freezing
Give 3 examples of a physical change
Could include:
cutting paper, bending a paper clip, mixing sand and iron filings, water freezing, etc.
Where do synthetic materials come from?
They are human-made through manufacturing processes
Where do the electrons live in the atoms?
orbital/ electron cloud
Give an example of an extended structure.
Could include:
Diamond, NaCl, Quartz, etc
What phase change goes from liquid to gas
Evaporation/Boiling
Give 3 examples of a chemical change
Could include:
rust, fireworks, digestion, vinegar and baking soda, lighting a match etc.
List 3 examples of synthetic materials.
Could include:
carbon fiber, nylon, steel, glass, paper, plastic, penicillin, rubber, etc.
Which particle is neutral--no electric charge
Neutrons
True or False: Molecules can only be made of two atoms of the same element.
False. Compounds are a type of molecule that have two or more DIFFERENT elements
Which state of matter has definite shape and volume
solid
True or false: A new substance is created in a PHYSICAL change.
False. The material has changed form or shape in a physical change, but is still the same material
Why are synthetic materials important?
a. They occur naturally and are easier to obtain.
b. They can be found in rare environments
c. They often have properties that natural resources do not
d. They require no energy to produce
c. They often have properties that natural resources do not
Which particle occupies the space outside the nucleus of an atom--is negatively charged
Electrons
Explain one difference between a molecule and an extended structure.
Extended structures:
repeat in a pattern
are larger
are stronger/ more rigid
Which state of matter does NOT have definite shape and or volume
gas
True or false: We need to have a chemical reaction to see a chemical property.
True! We cannot observe chemical properties without a chemical change.
How are natural/ raw materials and synthetic materials different?
Both are useful for humans.
Natural: found in nature
Synthetic: human-made through manufacturing processes