# Shared Flashcard Set

Physical Science
Semester 1 final
45
Science
12/11/2011

## Additional Science Flashcards

Term
 Ch1The main branches of natural science are:
Definition
 life, physical, and earth science.
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 Ch1What do scientists who do pure science do?
Definition
 They do experiments to find out about the world.
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 Ch1What is a scientific law?
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 it is a description of a natural event.
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 Ch1Scientific theories can be changed or replaced when
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 new discoveries are made.
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 Ch1Scientists test a hypothesis by
Definition
 doing experiments.
Term
 Ch1Maria is 123 centimeters tall. her height in meters is
Definition
 1.23m
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 Ch1Which SI prefix means one one-hundredth (1/100)?
Definition
 centi-
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 Ch1A loaf of bread weighs 1362g. the weight in kilograms is
Definition
 1.362kg
Term
 Ch1The speed of light is approximately 3 × 10(8power)m/s. How would this be written in conventional notation?
Definition
 300,000,000 m/s
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 Ch1You asked to find the volume of a cube that is 2.5 cm high, 2.65 cm wide, and 3.456cm long. How many significant figures should you show in your answer?
Definition
 2
Term
 Ch1A measurement that is accurate is one that
Definition
 is close to the true values.
Term
 Ch1A mathematical representation of an object or event is a
Definition
 model
Term
 Ch1Any factor in an experiment that can change is referred to as a
Definition
 variable
Term
 Ch1Combinations of the SI base units, which are used to measure quantities such as volume, speed, and pressure, are called
Definition
 derived units
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 Ch1In the SI system, what prefix means one millionth?
Definition
 Micro-
Term
 Ch1The number .0009234 would be written in scientific notation as
Definition
 9.234 × 10(8power)
Term
 Ch1The number of 56,780,000,000 would be written in scientific notation as
Definition
 5.678 × 10(10power)
Term
 Ch1The number 4.065 has how many significant figures?
Definition
 4
Term
 Ch1"That measurement is very precise, but it is still not accurate." Explain how this statement might be true.
Definition
 A measured quantity is only as accurate as the tool uses to make the measurement.
Term
 Ch2Matter is defined as anything that
Definition
 has mass and takes up space.
Term
 Ch2The smallest unit of a substance that behaves lie the substance is
Definition
 a molecule.
Term
 Ch2The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
Definition
 5
Term
 Ch2What is an example of gas- liquid mixture.
Definition
 a carbonated drink
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 Ch2Which state of matter will hold its shape without a container?
Definition
 solid
Term
 Ch2The kinetic energy states that the higher the temperature, the faster the
Definition
 particles that make up a substance move.
Term
 Ch2The ability to change or move matter is referred to as
Definition
 energy
Term
 Ch2Evaporation refers to the change of state from a
Definition
 liquid to a gas
Term
 Ch2During a chemical or physical change, energy may be
Definition
 converted to another form
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