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28 Cards in this Set

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What has a definite shape and definite volume in general, and is the densest state of matter.
Solids
What has no definite shape but has a definite volume in general, and is the second densest state of matter.
Liquids
What has no definite shape or volume in general and is the least densest state of matter.
Gases
What is chemistry?
It is the study of matter and it's changes.
EXPLAIN the meaning of the word element.
Elements are the basic building block of all matter. They are pure substances that cannot be broken down into any simpler substances by chemical reactions.
What are the most common elements in space, and make up 98% of the mass of the universe?
Hydrogen and Helium.
What are the most common elements on the Earth's atmosphere?
Nitrogen and Oxygen.
What does your body consist of?
65% oxygen, 17.5% carbon, 10.2% hydrogen, 2.4% nitrogen, 1.6 calcium, and 3.3% of other elements.
Why is Iron good?
Because it can be combined with other metals.
What is an atom?
The smallest unit of an element that retains the properties of that element.
What is Buoyancy?
The upward push of a liquid or gas on an object placed in it.
What is Corrosion?
The gradual wearing away of a metal by combining with nonmetals in its environments.
What is Density?
The amount of mass for each milliliter of a substance; formula is mass of an object divided by its volume.
What is Ductility?
The ability to be pulled into thin wires without breaking.
What is an Electron?
A particle in space outside of the Nucleus of an atom that carries one unit of negative electric charge.
What is an Element?
A pure substance that cannot be broken down into an simpler substances through chemical reactions,.
What is Malleability?
The ability to be bent, flattened, hammered, or pressed into new shapes without breaking.
What is Mass?
A measure of the matter in an object.
What is Matter?
Anything that has mass and takes up space.
What are Metals?
Any group of elements that conducts heat and electricity, has shiny luster, and is flexible.
What are Molecules?
A particle that contains more than one atom joined together.
What is a Neutron?
A particle in the Nucleus of an atom that has no electric charge.
What are Nonmetals?
Elements that are dull, poor conductors, and brittle.
What is a Nucleus?
The center of an atom that has most of its mass.
What is a Proton?
A particle in the nucleus of an atom that carries one unit of positive electric charge.
What is a Semiconductor?
A material that has properties in between conductors and insulators.
What is Volume?
A measure of how much space the matter of an object takes up.
What s Weight?
a measure of how gravity pulls on an object.