Description
Follow the link below to begin your lab experience.
http://www.glencoe.com/sites/common_assets/science/virtual_labs/ES15/ES15.html
For the Week 6 lab, you will need to channel your inner weatherperson. In this lab, you will be attempting to predict the weather in 3 cities based on the regional weather pattern of the previous 3 days. Follow the directions as provided on the website; you may choose any region. In your introduction, you will be discussing what atmospheric conditions define the weather and why being able to predict the weather is important. The M&M will require a little research as you will need to discuss the pieces of equipment used to collect the atmospheric data (wind speed, temperature, etc.) that are found at each weather station. Your R&C will be a comparison of your predicted Day 4 weather conditions and the actual conditions. To facilitate this comparison, you will include in your R&C a screenshot of your predicted weather and a screenshot of the “checked” weather. If there are any differences between your predicted and actual weather, discuss how the data may have been misinterpreted.
- Earth Science, 15th edition, by Edward J. Tarbuck, Frederick K. Lutgens, Dennis Tasa. Pearson/PrenticeHall, 2018.
Ch: 16-18
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Explanation & Answer
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Weather
Name
Abstract
Minerals are solid substances that occur naturally and abundantly in Earth. Each mineral
has a distinct chemical composition and properties. These properties include appearance, luster,
cleavage/fracture, streak color, and hardness. By testing these properties, we are able to
distinguish a certain mineral. In this experiment, we are given five unknown minerals. To identify
them, the following tests are performed: a magnifying glass was used to visualize its appearance,
luster, and cleavage/fracture; the minerals were dragged on a streak plate to produce their
streak colors; and their hardness was determined by scratching them on and with a nail and a
sheet of glass. Based on the results, the identities of Minerals A, B, C, D, and E are hematite, talc,
fluorite, pyrite, and magnetite, respectively. In the experiment, streak color was the most helpful
test since all of the unknown minerals had unique streak colors. Moreover, streak color is more
reliable since produced a uniform result whereas mineral color could vary. The least helpful tests
in the experiment were the luster and cleavage/fracture tests because there are only two
possible options, thus, minerals are more likely to have same results. Some minerals were easier
to identify than others due to their uniqueness. For example, only fluorite has a purple color
among the minerals in the handbook, which made it easy to identify it.
Introduction
Minerals are naturally-occurring solid substances that are made of up one or more
elements. The Earth is rich with minerals, which means that they can be found anywhere. This
has attracted interest in scientists who study their properties. Throughout history, people have
pegged certain minerals valuable, which is why mining them has become one of biggest industries
in the world. Minerals can be transformed into goods that can be consumed by the general public
such as pans, jewelry, money, and many more.
Minerals share five characteristics: 1) they are formed naturally either through the
solidification of magma, precipitation from a solution, or evaporation of a solution; 2) they are
inorganic; 3) minerals are solid substances; 4) minerals can be distinguished by their unique
chemical compositions; and 5) the atoms of a mineral are arranged in a repeating pattern, which
is unique to that mineral. Minerals are characterized by their properties which include
appearance, luster, cleavage/fracture, streak color, and hardness. By testing these properties,
anyone can identify an unknown mineral. Due to their abundance, we are likely to encounter a
mineral, either in its natural form or as a material component in common things that we use in
our daily lives. Therefore, if we wanted to identify an unknown mineral, we can simply test its
properties.
Materials and Methods
In this lab experiment, we were given five different minerals with unknown identity. The
objective of this experiment was to determine their identities by testing the following mineral
properties: luster, cleavage/fracture, color, streak color and hardness.
Prior to any performed tests, the mineral was placed on a testing plate where all the tests
will be performed. To test for the color, luster, and cleavage/fracture of the unknown minerals,
a magnifying class was used to inspect their appearance. The color of a mineral is unique and
distinguishable; thus, an unknown mineral can be matched to minerals with known colors to
determine its identity. The luster of a mineral is deemed metallic if it is shiny and reflects light or
non-metallic if it is opaque and does not reflect light. Additionally, a min...