Oxygen and silicon alone comprise 75% of crustal rocks by weight. Indicate whether the statement is true or false
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Genetically modified organisms are created by
A. injecting growth hormones into seeds or pregnant animals. B. inserting chemical pesticides into embryos to improve pest or disease resistance. C. cloning of good producers to make millions of offspring. D. inserting pieces of DNA, which will result in pest or disease resistance in a crop.
Peridotite is the main constituent of which part of the Earth?
A) Crust B) Magma chambers C) Rift zones D) Upper mantle
Which of the following is an example of tertiary circulation?
A) Migratory high and low pressure systems B) General circulation of the atmosphere C) Subtropical high pressure systems D) Land-sea breezes
Which of the following features in a sedimentary rock can be used to interpret its depositional environment?
a) sedimentary structures b) types of fossils c) the types of minerals (such as halite or gypsum) d) the size, shape and surface texture of the sedimentary grains e) All of the above features can be used to interpret depositional environment