Chapter 1 Concepts
Law tells the ______ of a scientific phenomenon, theory tells the __________ of a scientific phenomenon.
What is how and why? (in that order)
How many sig figs are there in this number: 1938
What is 4?
How do you calculate neutrons in an atom?
Take the rounded mass and subtract the atomic number (AKA number of protons)
Give three examples of non-matter.
answers will vary
What is the density equation? D =
Physical Science includes these two branches of science.
What are physics and chemistry?
Convert to standard form: .00392
What is 3.92 x 10^-3
_________ and ________ are pure forms of matter. However, ________ are impure.
What are elements, compounds and mixtures? (in that order, first two are interchangeable)
Matter has both mass and _________ (hint: think density)
What is volume?
If an object has a mass of 2 kg and a volume of 1 cm^3, what is its density?
What is 2 kg/cm^3?
Ms. Wolf decides to contact all parents of CCS students and ask how they feel about school policies. She writes down their responses and sends an email to Mr. Daniel Simon to share the information she collected. This is a __________________ measurement.
Convert to Scientific Notation: 100
What is 1.0 x 10^2
Pure substances can only be separated _______________.
What is chemically?
What are the equations to find the following (using density equations)
Mass =
Volume =
What is M= D x V?
What is V = M / D?
What are the SI units for length, time and mass (+200)
SI units are the international units of measurements that scientists use for ease of reproduction.
m, sec, kg
How many sig figs are there? Explain the significant figures.
00290.084700
What is 9?
Give three examples of physical changes.
Though we cannot produce chemical changes without the help of lab materials, share 3 ways you can tell a chemical change has occurred.
Answers will vary.
What are the two CHEMICAL properties we discussed in class?
What are flammability and reactivity?
An object with a mass of 3 kg is placed in a graduated cylinder filled with water. Before the object is placed in the cylinder, its volume reads 3 mL. After the object is placed in the cylinder, its volume reads 6 mL. What is the density of this object?
What is 1 kg/mL?
This is the term for when new properties arise from the combination of two characteristically different substances.
What are emergent properties?
Name at least 4 of the significant figure rules.
answers will vary
Define reproducibility.
How reproducible an experiment is describes how easily it can be carried out by a separate scientist. The goal is to exactly mimic the conditions of the original experiment and find the same results.
Name and define ALL the phase changes including where energy must be added/removed to occur.
gas --> liquid = condensation (energy -)
liquid --> solid = freezing (energy -)
gas --> solid = deposition (energy -)
solid --> liquid = melting (energy +)
liquid --> gas = evaporation (energy -)
solid --> gas = sublimation (energy -)
Give a clear, concise definition of density in scientific terms!
Example: Density describes how much volume is displaced by an object's mass.
answers will vary