How are cinder cones different from the other two major types of volcanoes? What will be an ideal response?
Cinder cones are made of pyroclastic materials called cinders. They are small, usually not more than
400 m high, often with a bowl-shaped crater. They sometimes have lava flows on their lower flanks.
Many cinder cones are found within or around larger volcanoes
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Which event does not occur during the decay of potassium-40 isotopes?
A) An electron orbiting near the nucleus enters into the nucleus and combines with a proton to produce a neutron. B) Electrons rearrange, producing x-rays. C) A neutron changes to a proton and emits an electron. D) A proton is ejected from the nucleus.
All mutations are either harmful or beneficial. Indicate whether the statement is true or false
In Appalachia, many miners are out of work because ________
A) they were fired for protesting mountaintop removal B) of a moratorium on mountaintop removal C) of local protests that shut down mining operations D) they are not needed, since mountaintop removal is highly mechanized E) coal extraction has decreased because the region is beginning to run out of coal
Mike stands at the edge of a cliff and throws one ball straight up and another ball straight down, both with the same speed. Neglecting air resistance, which ball hits the ground below with the greater speed?
A. The one thrown downward B. The one thrown upward C. neither, both hit with the same speed D. need more information