Transcript What is a mineral?

1.
All of these are examples of ways in
which models can help scientists
except
A.
Communicating observations and
ideas
Saving time, money, equipment,
and lives
Predicting exactly what will happen
Predicting possible outcomes
B.
C.
D.
Technicians plan to develop a new type of
keyboard that will have alphabet letters in
different positions from a standard keyboard.
Which will BEST help the technicians
decide if the new keyboard is an improvement
over the standard one?
2.
Asking people their opinions of how they like
standard keyboards
B. Analyzing the problems that people have
using standard keyboards
C. Determining how much it will cost to make a
new keyboard
D. Comparing the speeds at which people type
on each style of keyboard
A.
Bell work 9/14/2015-GET YOUR COMP BOOK!
Technology developed for the space program
has resulted in both intended and unintended
benefits. Which of these is the MOST likely
intended benefit of Hubble Space Telescope
technology?
Lenses that filter dangerous light that comes from
the sun
B. Video headsets that magnify people’s view of their
surroundings
C. Cordless, rechargeable remote-control devices
D. Colorful, expensive materials used to print off
pictures
A.
What is a mineral?
Plates=silica and
feldspar
Radio=aluminum,
copper, gold, iron
Toaster=copper, iron,
nickel, mica, chromium
What is a mineral?
To be a mineral, it must have all five of
the criteria below.
1.
2.
3.
4.
5.
They are not made by humans.
They have never been alive and are not
made up from plants or animals.
They are solids.
Each one is made of a particular mix of
chemical elements.
Minerals “grow” as crystals because the
elements that make them up are arranged
in a certain way.
What do you think…
Object
#1:
Wood
No
What do you think…
Object
#2:
Quartz
Yes
What do you think…
Object
#3:
Plastic
No
What do you think…
Object
#4:
Graphite
Yes
What do you think…
Object
#5:
Copper
Yes
What makes up a mineral?
Mineral Facts:
There are thousands of different kinds of
minerals.
Many of the minerals come from magma
cooling.
Some are formed from compounds dissolved in
a liquid.
There are about 100 common minerals formed
from the 8 most abundant elements from the
Earth’s crust: aluminum, iron, calcium,
sodium, potassium, magnesium, oxygen, and
silicon.
Two Groups of Minerals:
Silicate Minerals
silicon and
Made up of ________
oxygen
__________
90
Make up ______%
of
Earth’s crust
Mica and
Ex: Quartz, ________,
Feldspar
Nonsilicate Minerals
Does not contain
silicon or oxygen
__________
Made up of Carbon,
Oxygen, Fluorine, and
Sulfur
_____________
Ex: Native elements,
Carbonates Halides,
____________,
Oxides, Sulfates, and
Sulfides
Examples of Minerals:
Silicate Minerals
Examples of Minerals:
Nonsilicate Minerals
Properties of Minerals
How to identify minerals…
Color
Luster – the way a mineral reflects light (metallic
or non-metallic)
Hardness – the ability of a mineral to resist
being scratched
Streak – powder scraped off is the same color as
the mineral
Density
Crystal shape – 6 basic crystal shapes
Cleavage and fracture – how a mineral breaks
Special properties – individual properties that
individual minerals have (ex. Magnetite is
naturally magnetic)
Today’s Goals:
Know how to tell if something is a
mineral or not
Explain how color and luster are
used to identify minerals
LUSTER
Luster refers to how light is
reflected from the surface of a
mineral.
Is it shiny? Does it look oily?
COLOR
Most minerals occur in more than
one color.
Luster: Yes or No?
Yes
Luster: Yes or No?
Yes
Luster: Yes or No?
No
Luster: Yes or No?
Yes (glassy
Luster: Yes or No?
Yes
Luster: Yes or No?
No
Why is color not the best property to
use to identify a mineral?