Physical Science
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State the SI unit for temperature
Kelvin
State the SI unit for mass
Kilogram
State the SI unit for time
S
State the SI unit for distance/length
meter
What is the difference between quantitative and qualitative data? Give an example of each.
Quantitative data has numbers (A football field is 100 yds) and qualitative data is descriptive (my hair is brown)
What kind of questions can science answer?
Science can answer questions about the physical world.
What types of questions can science NOT answer?
Science cannot answer questions about religion, what is right and wrong, and supernatural.
Write 0.000867 expressed in scientific notation.
8.67 x 10^-4
How many significant figures are there in 06.07980?
6 significant figures
A hippo can run 19 miles per hour. How fast is that in meters per second? (1 mi=1609m)(1 hr=3600s)
(19 mi/1 hour) x (1 hr/3600s) x (1609m/1 mi)=8.49 meter per second
What is a dependent variable? What is an independent variable?
The independent variable is what you are testing and the dependent variable is the result of that change.
What is the correct formula for writing hypothesis statements?
if/then statements
What axis do independent variables go on? What axis do independent variables go on?
Independent on x-axis, dependent goes on y-axis
Give 4 examples of things that are made of matter.
table, phone, car, clothes, blood, air
Give 3 examples of things that are NOT matter
heat, energy, space
What two things are classified as pure substances?
elements and compounds
What is a compound? Give an example
Two different elements bonded together. NaCI, H2O
How is a compound different than a molecule?
Compounds have to be made of different elements, where a molecule is just more than one atom joined together
How many total atoms of Phosphorus are there in 4Ca3(PO4)2?
8 atoms
What is a homogeneous mixture? Give an example.
Mixture that has uniform composition. Lemonade, tea, steel
What is a heterogeneous mixture? Give an example.
Mixture that DOES NOT have uniform composition. Chicken noodle soup, blood, dirt.
What is a Physical Property? Give 3 examples.
characteristic of a substance that can be observed or measured without changing the identity of the substance. Color, density, shape.
What is a chemical property? Give 3 examples.
a characteristic of a particular substance that can be observed in a chemical reaction. Flammability, combustibility, reactivity.
Give 4 signs that a chemical change is occurring.
Odor is produced. Unexpected color change, bubble/heat forming