ESC-1000 - Scientific Method, Minerals, and Ig Rocks (Quiz)

Read the article about insect populations, and then complete the assignment.

https://www.sciencemag.org/news/2017/05/where-have-all-insects-gone#

Which of the following statements is true according to the bar chart from the nature preserve in Germany,?

(T) Insect mass declined from about 500 g in June 1989 to about 125 g in June 2013.

Which of the following statements would be an alternative hypothesis, which is in contrast to the null hypothesis.

1 Insect populations have not declined over time. (?) Insect populations have increased in many parts of the world. 3 Insect populations have decreased in many parts of the world. (Not this one) The article offers no alternative hypothesis.

The null hypothesis is the default hypothesis--that two variables are not related or that a variable does not change over time. In the article about the decline of insect populations, which of the following statements would best describe the null hypothesis of the article?

1 Insect populations have significantly declined over the last three decades. 2 Insect populations show no trends over time. (?) Insect populations have increased in many parts of the world. (Not this one) The decline of insect population is related to the use of pesticides.

The article starts by discussing people's "gut feelings" that the windshield of their cars are cleaner now than in the past due to a decline in insect populations. Which of the following best describes this type of information?

1 Valid scientific data (Not This one) Outliers (?) Type II Errors 4 Anecdotal evidence

Match the rock to its property, texture, and (or) mineral composition. (PHUQ THIS GUY!)

Pahoehoe-fluid lava that results in ropy texture. Rhyolite-Aphanitic texture with quartz, potassium feldspar, and sodium plagioclase. Granite-Large, easily visible crystals of quartz and potassium feldspar. Peridotite-Green rock composed primarily of olivine and small amounts of pyroxene. Porphyritic basalt-Large calcium plagioclase crystals in a fine-grained background indicates two stage of cooling history. Pumice-Light colored rock with a frothy texture. Obsidian-Glassy texture results from rapid cooling. Gabbro-Phaneritic rock consisting mostly of calcium plagioclase and pyroxene. Diorite-Phaneritic rock with ampibole, biotite, and plagioclase. Contains no quartz or olivine. A'a-Broken texture results from thick, viscous lava. Scoria-Dark rock with numerous gas vesicles. Basalt-Aphanitic rock consisting mostly of pyroxene and calcium plagioclase with minor amounts of olivine and amphiboles.

Match the minerals to their properties and (or) uses.

Quartz-Hardness = 7; no cleavage. Muscovite-Silicate mineral. One plane of cleavage produces flat, shiny sheets. Olivine-Single tetrahedron joined by iron or magnesium. No cleavage. Halite-Three planes of cleavage at 90 degree angles. Dissolves easily in water. Salty taste. Calcite-Fizzes with hydrochloric acid. Hardness = 3. Used to make Portland cement. Corundum-Hardness = 9. Used as abrasive or in jewelry. Gypsum-Hardness = 2. Used to make plaster of Paris. Graphite-Easily scratched with fingernail. Greasy appearance. Used to make pencil lead. Pyrite-Distinctive gold color. Chemical formula is FeS2. Magnetite-Magnetic. Ore of iron. Diamond-Hardest known substance. Used in jewelry and as an abrasive. Native copper-Malleable. Used in electronics.