Terms  Definitions 

color 

dood 
DID

area: 
is squared

Shear Stress Max 
16T/pi*d^3

Volume of a Cylinder 
(pi)r2(h)

strength 
4x as much when doubled

Vertex 
Where 3 or more edges meet

bases 
faces that are congruent, parallel polygons

examples of amorphous solid 
glass, rubber, plastic

Cube 
A solid figure with six congruent squares as its faces

polyhedron 
a solid formed by polygons that enclose a single region of space

Malleable 
Capable of being hammered or rolled onto a sheet.

Amorphous 
doesn't have a repeating pattern of molecules

ionic solids 
dissolve in water and conduct electricity

Reactivity 
a substance that enters into a chemical

Lateral Faces 
the sides that arn't on the bottom

elastic limit 
the farthest an object can stretch until it won't go back to its original shape

Scaling 
The study of how size affects the relationship between weight, strength, and surface area

Materials 
They shape our lives and are sometimes created accidentally.Human needs create them too.

cylinder 
is a solid with two congruent circular bases that lie in parallel planes.

crystal 
a substance in which the particles are arranged in an orderly, geometric pattern.

elements 
a substance taht canout be broken down into other substance b chemical or phyical means

denisty 
measurement of how much matter is in a given amount of space

Specific Gravity 
A standard measure of density that is a ratio of mass (or weight) of a substance to the mass (or weight) of an equal volume of water. (specific gravity= mass or weight x mess or weight of an equal volume of water)

rectangular prism 
a shape with... 4 rectangles and 2 squares
6 faces 8 vertices 12 edges 
compound 
a substance made of 2 or more elements chemically combines

density 
the measurement of how much mass of a substance is contained in a given volume

Material Science Technology 
A course about the materials in our lives and how they can be manipulated.

What are densities given at? Why? 
Density varies with temperature and pressure so, except for water, densities are given at 0C and atmospheric pressure

Surface area of a culinder 
words: the surface area of S of a cylinder is the sum of twice the base area B and the product of the base circumference C and the height h.

Which has the greater density 1g or uranium or planet Earth? 
Any amount of uranium is more dense than Earth. The average density of Earth is actually 5.5 g/cm^3, much less than the density of uranium (19 gram/cm&3)

What happens as the size of a thing increases? 
As the size of a thing increases, it grows heavier much faster than it grows stronger

volume 

crystalline 
melts quickly

square pyramid 

Crystals 
regular geometric shapes

vertices 
edges meet at points.

Surface Area of a Sphere 
4(pi)r3

liquid, aqueous 
ionic solids conduct electricity when

Chemicals 
They are found everywhere in everything. Not just in a laboratory.

covalent bonds 
forces holding covalent network solids together

prism 
a polyhedron with two bases, lateral faces, and lateral edges

vapor pressure 
measure of liquids tendency to evaporate

elastic 
tennis balls and springs are examples of ________

supercooled liquids 
substances that retain certain liquid properties even at temperatures at which they appear to be solid.

GAS 
A STATE OF MATTER WITH NODEFINITE SHAPE OR VOLUME.

Base of a Cylinder 
the bottom of a cylinder

regular polyhedron 
a polyhedron where each face is enclosed by a regular polygon and each face is congruent to the other faces and the faces meet at each vertex in the exact same way

Mixtures 
Formed when 2 or more elements are mixed together not chemically combined. EX: vinegar and oil,

Non Ionic Solids 
oppositely charged atoms of the lattice points

Solid figure 
A figure that has length, width and height

oblique prism 
a prism that is not a right prism

Iron Age 1000BC 
Iron rarely occurs free in nature. High temperatures are needed.

tetrahedron (triangular pyramid) 
a shape with... 4 triangles
4 faces 3 vertices 1 apex 6 edges 
liquid 
a state of matter that has a definite shape

lateral area 
the sum of the areas of the lateral faces of the prism

total surface area 
sum of the areas of all the faces or surfaces that enclose the solid

Are all crystals visible to the naked eye? 
Not all crystals are visible to the naked eye. Their existence in many solids wasn't discovered until xrays became a toll of research early in the 20th century.

*When you look at a sagging bean, can you see it bending down? 
Yes, well, atoms are tugged away from one another. The top part is slightly longer. Can you see the bottom part is compressed? atoms there are pushed TOWARD one another, making the bottom part slightly longer.

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