The Scientific Method
The following is an observation or an inference?
Mr. Grishaber is angry
What is an inference
This is a form of matter that flows, has a fixed volume, and takes the shape of its container
What is a liquid
The 3 subatomic particles that make up an atom
What are protons, neutrons, and electrons
This scientist first introduced the idea of "atomos"
Who is Democritus
This state of matter has molecules that are moving the FASTEST
What is a gas
The type of observation for the following:
the room is 72.6 degrees
What is quantitative
This is the property of matter that determines whether something will float or sink
What is density
The atomic mass of an element with 5 protons, 5 electrons and 6 neutrons
what is 11 amu
This scientist first discovered electrons
This is the subatomic particle that plays the GREATEST part in determining the characteristics of an atom
What are electrons
Ms. Wiktor, creates a quick experiment on the number of hours spend studying and finals grades. She surveys the class on the hours spent studying, then the students take the final, and she records the grades. State the independent and dependent variables
IV: hours spent studying
DV: Grade on final
Examples of this type of property include: melting point, boiling point, dissolves in water
What are physical properties
An atom with atomic number 50 and mass number 125 has this many protons, neutrons and electrons
What is:
50 proton
50 electrons
75 neutrons
As a result of this scientist's experiment, the Gold Foil experiment, we now know that the nucleus is small, dense and contains positive particles.
Who is Rutherford
This is the number of significant figures in 0.000000567
What is 3 SF
This is the difference between a control group and control variables?
The evaporation of water is an example of this kind of change.
What is a physical change
Write the nuclear notation for oxygen - 18
18
6 O
This scientist discovered the neutron
who is Chadwick
Vegetable oil has a density of 0.8 g/mL. If you put a 3 pound ball of wood with a density of 0.8 g/mL in the oil, what will happen? Explain.
Neither float nor sink. It will hover in the middle of the substance because both densities are exactly the same.
A scientist testing the affects of a chemical on apple yield sprays an orchard with the chemical. A second orchard does not receive the chemical. In the fall, the number of apples harvested from each forest is counted. - Write a hypothesis for this experiment
valid answers must have a prediction and science reasoning
This is the difference between a compound and a mixture
Compounds are bonded together where as mixtures do not have bonds
Draw a Bohr diagram for sodium
11p, 12n, 11e
model should show 3 rings with 1e on the outermost ring
Write the scientists in order of earliest contributions to current atomic contributions
Democritus, Dalton, Thompson, Rutherford, Bohr, Chadwick, Schrodinger
Three isotopes of oxygen occur in nature: oxygen-16, oxygen-17, and oxygen-18. The atomic mass of oxygen is 15.9994. This isotope of oxygen will be the most abundant
What is oxygen - 16