How many of the known minerals found in the Earth's crust are impure? (mixed with something else)

a) None of them

b) All of them

Which is an uncomfortable twitching of the muscles of the legs, particularly the calf muscles, along with an indescribable tingling, aching, or crawling-insect sensation?

This man met a woman with the genotype BBee, what are the different combinations of the alleles in her gamates (4 answers)

Which observational study design allows scientists to hypothesize a potential causal association? Select one: a. Case study b. Cohort study c. Cross-sectional study d. Case-control study

Which of the following is true regarding audience? A. Consideration of the audience is less important than the message of an essay. B. An author should write for himself first; the audience is secondary. C.

Which would you pick Play dough or Kinetic sand?

Which of the following correctly describes the size of the Milky Way galaxy?

The fossil record shows that two groups of organisms are related, which means they share a

The sun is A. An unusally hot star B. A very cool star C. A typical star D. None of the above

Which plant is often used as a soil conditioner Some Moss A Fern Some Horsetail Or maybe some Hornwort I just put my own little twist in words but the questions are Moss, Fern, Horsetail, and Hornwort

Astronomers studying the planet of Acer have detected igneous rock under its surface. One astronomer makes a claim that some of the material that this igneous rock formed from used to be in sedimentary rock on the surface of Acer.