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Scientific Method
kyjameonne
Physical Properties
Compounds, Molecules
Atoms, Elements
100
What is the first step in the scientific method?
Formulate a question (based on observations)
100
who do i like
what is kamryn
100
What is the formula for density?
mass, volume.
100
What are the 3 parts of an atom?
Atom
100
What are the 4 phases of matter?
Solid, liquid, gas, plasma.
200
What is the name of the variable we measure?
Dependent (responding) variable
200
How many electrons are in a water molecule?
10 electrons
200
True or False: Viscosity is the ability to transmit light?
False
200
Are elements made up of atoms or are atoms made up of elements?
Elements are made up of atoms.
200
When matter changes from a solid to a liquid it is _____________
Melting.
300
The actual steps we follow in an experiment are called a __________.
Procedure
300
Water molecules are connected to each other by what kind of bond?
Hydrogen bond.
300
In the Station Lab was the purple water transparent or translucent?
Translucent.
300
What element has 8 protons, 8 neutrons and 8 electrons?
Oxygen.
300
During what state of matter do atoms only vibrate in place?
Solid state.
400
What section does data and observations go into?
Results
400
Liquid water has _____________ volume and indefinite shape.
Definite.
400
If the length, width, and height of a cube is 2cm and it’s mass is 16g, what is it’s density? (correct labeling of units does not apply - although you should know them).
2g/cm3
400
Is a substance with 2 or more atoms chemically combined an element or a molecule?
Molecule.
400
What state is the most dense; solid, liquid, or gas (water is an exception to this rule).
Solid is most dense.
500
Where do inferences go?
Conclusion
500
Are water molecules polar or non-polar. Don't write an explanation, but you should have an explanation ready.
Polar. Water molecules share electrons unevenly. In a game of tug o'war the oxygen atom is like a big football player that attracts more negative electrons. The hydrogen atoms are like a toddler; their negative electrons are being pulled away from them, making them more positive.
500
What type of test or scale is used to examine/measure the hardness of a substance?
Scratch test or Moh's hardness scale.
500
Is water a molecule or a compound molecule? Be able to explain your reasoning
Compound Molecule.
500
What is it called when a substance changes directly from a solid to a gas? ________________
Sublimation.