The properties of ductility, malleability, ability to conduct heat and electricity are characteristics of what type of material?
A) all elements
B) metallic elements
C) metalloid elements
D) nonmetallic elements
B
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Which experience was the most important in causing Darwin to begin to think about evolution and the history of life?
A. meeting Jean Baptiste Lamarck B. working as a naturalist on the H.M.S. Beagle C. studying the gradual erosion of canyons D. watching a debate between Charles Lyell and Thomas Malthus
Which of the following photographs depicts an igneous rock where the magma cooled slowly at first and then had fast cooling?
A)
B)
C)
D)
Which of these minerals would be the main component in the cement slab in your house?
A. gypsum B. calcite C. quartz D. hematite E. clay minerals
What have scientists discovered will happen to a hurricane about six hours after it produces hot towers?
A) The storm will make landfall. B) It will produce an outbreak of tornadoes. C) It will intensify. D) The wind speeds will drop.