The two most abundant elements in Earth's crust are
What will be an ideal response?
Silicon and oxygen
You might also like to view...
Complex molecules in the interstellar medium are found:
A) uniformly throughout the disk of the Galaxy. B) scattered evenly throughout the universe, a product of the Big Bang itself. C) only around the supergiant stars like Betelguese that make their heavy atoms. D) primarily in the dense dust clouds. E) on the surfaces of the coolest class K and M stars only.
Nearly every aspect of astronomy is related in some way to the existence of gravity and to the motions which are responsible for a balance against gravity. How does this balance play a role for the miscellaneous objects of the solar system (i.e
, the asteroids and comets)? How can some aspect of this be used as a tool to determine masses in the solar system?
Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. Their dog, Spot, starts from Arthur's side at the same time and runs back and forth between them
By the time Arthur and Betty meet, what is Spot's displacement?
A magnifying glass has a focal length of 7.0 cm. What is the angular magnification if the image is viewed by a person having a relaxed eye with the near point of 25 cm?
A) 1.6 B) 2.6 C) 3.6 D) 4.6