defenitions
más defenitions
EEK! MATH!
fill in the blank
Choose the right word!
100
A single kind of matter that is pure, meaning it always has a specific makeup- or composition- and specific set of properties.
What is a substance?
100
The basic particlee fom which all elements are made.
What is an atom?
100
L:5 cm W:7cm H:2cm
What is 70cm^3?
100
_________ are the simplest substances.
What is an element.
100
Every chemical (and/or) physical change in matter includes a change in energy.
What is and.
200
A pure substance that cannot be broken down into any other substances by chemical or physical means.
What is an element
200
A pure substance made of two or more elements chemically combined in a set ratio.
What is a compound?
200
Mass: 200g Volume: 20cm^3
10g/cm^3
200
When elements are chemically combined, they form ________(s) having properties that are different from those of the uncombined elements.
What are compunds?
200
Natural gas is (never/mostly/always) the compound methane.
What is mostly
300
It is the study of the properties of matter and how matter changes.
What is chemistry?
300
Groups of two or more atoms held togethe by chemical bonds.
What are molecules?
300
If you had a cup filled with 50mL of water and added a little toy that made the water go to 53mL or water, then how much is the mass?
The mass is 3 mL ((that was a give-me))
300
The parts of a mixture are not combined in a _____ _____.
What is a set ratio?
300
Density is a (physical/chemical) property of a substance.
What is physical?
400
It is a characteristic of a pure substance that can be observed without changing it into another substance.
What is physical property?
400
It is a characteristic of a pure substance that describes its ability to change into different substances.
What is chemical property?
400
For every molecule of methane that burns, how many oxygens are used?
What is 2?
400
Unlike wieght, ______ doesnt change with location, even with the force of gravity on an object changes.
What is mass?
400
A substance that undergoes physical change is (still the same/ a different) substance after the change.
What is still the same?
500
The fact that matter is not created or destroyed in any chemical or physical change.
What is the law of conservation or mass? ((so tricky!))
500
The system of units used by scientists to measure the properties of matter.
What is International System of Units or Système International,
500
1L=?mL
What is 1000mL-s-
500
Unlike a ______ change, a _____ change produces new substances with properties different from thoseof the original substances. ((two different words))
What is pysical and chemical
500
The ability to react is a (physical/chemical) property.
What is chemical?
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