Explain why California would mandate the installation of catalytic converters in cars at a time when their use cost energy and degraded performance
What will be an ideal response?
California was dealing with a unique air quality problem in the "famous" Los
Angeles smog. It was a public health problem of great magnitude and required a strong
response. The converters reduced greatly the cars' emissions.
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How did Eratosthenes estimate the size of Earth in 240 B.C.?
A) by observing the duration of a solar eclipse B) by measuring the size of Earth's shadow on the Moon in a lunar eclipse C) by comparing the maximum altitude of the Sun in two cities at different latitudes on the summer solstice D) by sending fleets of ships around Earth E) We don't know how he did it since all his writings were destroyed.
Samples of the Earth's molten outer core come directly through the mantle, pour out of volcanoes, and can be studied in labs
Indicate whether the statement is true or false
A molecule is:
a. a combination of two or more atoms b. less stable than its constituent atoms separated c. electrically charged d. a carrier of one or more extra neutrons e. another term for an atom
The surface of Mars is surprisingly smooth and featureless
Indicate whether the statement is true or false