Numbers
Energy
Temp & Matter
ECM
Etc.
100
How many sig figs in 2.1070?
5
100
The capacity to do work
energy
100
If searching for Celsius, you _____ 273.
subtract
100
A substance that contains 2 or more elements that are chemically combined in a fixed proportion?
compound
100
A tentative answer to a scientific question is called a ...
hypothesis
200
How many sig figs in 0.0025010?
5
200
the ability to move an object against a resisting force
work
200
The point at which particle motion ceases is called...
absolute zero
200
A substance that cannot be broken down into simpler form chemically?
element
200
Which law states that matter cannot be created or destroyed?
The Law of Conservation of Matter (Lavoisier)
300
What is 2,350,000 in scientific notation?
2.35 x 10^6
300
the amount of energy needed to heat 1gram of water 1 degree Celsius?
calorie
300
0K=___Celsius
-273
300
Elements and compounds are considered pure substances because...
they have unique properties
300
Which state of matter has a definite volume, but no definite shape?
liquid
400
How many calories is 6.235J?
1.490 (must have 4 sig figs)
400
energy cannot be created or destroyed in any chemical process
Law of Conservation of Energy
400
As kinetic energy increases, what happens to the density of a substance?
decreases
400
A blend of 2 or more pure substances is called a...
mixture
400
Explain the difference between a homogeneous mixture and a heterogeneous mixture
homogeneous-looks like one thing heterogeneous-you can see the different components of the mixture
500
How many days is 6.1 x 10^5 minutes?
420 or 4.2 x 10^2 (only 2 sig figs)
500
What's the difference between kinetic energy and potential energy?
objects in motion have kinetic energy. potential energy is stored energy based on the position/arrangement of particles.
500
Melting, freezing, condensation, and evaporation are all examples of ______ changes.
physical
500
In this type of mixture you cannot see the different components.
homogeneous
500
What's the difference between a natural law and a theory?
law-explains how nature behaves theory-attempts to explain why nature behaves a certain way
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