MGLS PC LC4 Cuiz (1) - Compatibility ModeLayoutReferencesMailingsReviewViewHelpSearch=、三,F11AAAaAaBTAHeadA 2 A-ntParagraph4. Jason often sees trash left near the lake, such as plastic bags floating near tEHuman activities disrupt the natural cycling of materials in an ecosystem. Idedescribe three human activities that negatively affect the ecosystem.Vrite the letters of the correct answers on the line at left.

Deforestation is the activity in which permanent removal of trees takes place to make room for…

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1. Distinguish between condensation and evaporation A Condensation is the change of a liquid to a gas,while evaporation is the change of a gas to a liquid. B Condensation is the change from a gas to a liquid, while evaporation is the change from a liquid to a gas.
4. In a few sentences, relate the amounts of energy needed to heat the cold and hot water with the amounts of time that it took to heat each sample. Do the results make sense? Why?
2. Gross primary productivity in an equatorial grassland is 8,000 cal/m'/yr. This particular region has such a high efficiency that the grasses use only 75% of the energy in cellular respiration. Calculate the energy (calories) that is available to secondary consumers from 1 m of grassland over a year's period. 2. 8000 x75% =6000 callm/yr 0 callm²lyr
2. Casson model was discussed in class in the context of blood rheology. This phenomenological model is often used to describe the shear stress vs. shear rate relationship in colloidal suspensions where particle aggregation might cause the measured viscosity to increase at low shear rates. In an experiment, data for the shear stress rand the applied shear rate S were fitted to the Casson model written below (in a slightly different form compared to that given in the lecture notes): √t=√₁+√as. (1) The best least square fit parameters to the experimental data were found to be 40 mPa for the yield stress and 2.5 mPas for the parameter a, which is referred to as the plastic viscosity. a. Using Eq. (1), derive an expression for the fluid viscosity u as a function of S. b. Plot the viscosity of the fluid as a function of S for 0.1s¹
3. Which of the following describes an example of a material undergoing a chemical change to become another material with different characteristics? A. Iron turns to rust when it is exposed to oxygen. B. When water boils, it turns into vapor, which is a gas. C. Oxygen can become liquid at a very low temperature. D. Gold can be spread out very thin to cover a large area. Explanation:

4. Jason often sees trash left near the lake, such as plastic bags floating near Human activities disrupt the natural cycling of materials in an ecosystem. Ide describe three human activities that negatively affect the ecosystem.