How does an aneroid barometer differ from a mercury barometer?
What will be the ideal response?
ANSWER: An aneroid barometer houses a small, flexible metal box called an aneroid cell. Before the cell is tightly sealed, air is partially removed, so that small changes in external air pressure cause the cell to expand or contract. A mercury barometer consists of a long glass tube open at one end and closed at the other. Removing air from the tube and covering the open end, the lower portion of the tube is immersed into a dish of mercury. The column of mercury in the tube balances the weight of the air above the dish, and hence the height of the column is a measure of atmospheric pressure.
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If you measure a plot of land with a steel tape on a hot day, your measurements of the plot will be
A) smaller than actual. B) larger than actual.
Find Murphy Slough and Jenny Lind Bend. Which type of feature are they? Use a green colored pencil or pen and color in the other features of that type on the map.
What will be an ideal response?
After a policy is implemented, the next step in the policy cycle is to
A. Set an agenda B. Evaluate results C. Build support for the problem D. Suggest changes E. Develop proposals
Which of the following best describes the role of biological activity in soil development?
A) Plant roots provide channels for air and water movement in soils. B) Broadleaf trees tend to increase the alkalinity of soil, whereas needleleaf trees increase the acidity. C) Earthworms increase soil porosity and contribute to soil movement and organic content. D) All organisms living in, on, and over the soil, influence soil development and characteristics: they can influence the pH, the organic matter, chemical content, and biological content of soils.