Passive transport means there is no expenditure of energy ATP. Passive transport requires the substance to move from an area of high concentration to low concentration.
Distinguishing between crystalline and amorphous substances. Electron level picture of tin The atoms in crystalline solid matter are arranged in regular, repeating. All other types of solid matter are amorphous or without a regular atomic arrangement.
Metals and minerals are crystalline. Depending upon its composition, the crystalline pattern of a mineral may not be visible in a hand sample. In this case minerals are studied using X-ray diffraction, a technique that uses the reflection of X-rays to determine crystal structure and composition.
Draw the following diagram on the board to illustrate crystalline versus a noncrystalline amorphous patterns. On the worksheet, have the students outline or fill in spaces on the Altair designs sheet to create patterns. Their patterns are examples of order within the overall structure of the design.
This same type of organization generates crystalline structures in minerals. Since no two students are alike, none of them will see the same shapes, forms or patterns hidden in these designs. They may create some very interesting artwork.
After the students finish their patterns, see if there are any similar patterns. Use any similarities and differences to reinforce that there are many types of minerals, and hence many different crystal patterns.
Discovering that not all crystals are minerals. Comparing organic and inorganic crystals. Crystals consist of solid matter that has a regular, internal pattern of atoms: Individual crystals are bounded by smooth, planar surfaces called faces, that meet at specific angles.
For example, in halite crystals, the faces meet at right angles and can be seen by its cubic crystals.
Many times, however, the internal pattern is present but not visible. This may happen if the crystal grows in a confined space, and could not assume its preferred shape. Students usually think that all minerals have nice crystal shapes. This is not true.
Only minerals that had "room to grow" will produce nice crystals. Minerals are the basic building block of rocks. Minerals are inorganic crystals.
Crystals can also form from organic compounds.
For example, sugar can form crystals, but since sugar is composed of organic material, these crystals are not minerals. Minerals have to be naturally created or else they are classified as man-made substances. Pass around the geode from the module to demonstrate crystal growth. The quartz crystals in the geode are a good example of crystals that grew into an open space.
You may wish to describe how the geode formed. Little crystals grew and grew, until there was no room.A summary for the Nucleus Software Exports Ltd share. Signals range from Strong Buy, Buy, Neutral, Sell to Strong Sell.
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