What is the importance of "blueberries" found on Mars?
What will be an ideal response?
These tiny spheres are composed of minerals that suggest formation in a salty environment such as a pond or lake. The clumps of pebbles with rounded surfaces and sedimentary layers in the ancient streambed clearly indicate formation in flowing water.
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When an atom emits light, an electron in it moves from a higher to a lower energy level.
Answer the following statement true (T) or false (F)
________ objects are found at opposite ends of the bi-polar jets expelled in the protostar's T-Tauri phase
Fill in the blank(s) with correct word
Why is nuclear reactor waste radioactive?
a. Radiation from the reactor makes everything in or near it radioactive. b. Used fuel rods contain fission fragments which are radioactive. c. Spent fuel rods pick up contamination from the reactor. d. all of the above
A heavy dart and a light dart are launched vertically by identical ideal springs. Both springs were initially compressed by the same amount. There is no significant air resistance
Which of the following statements about these darts are correct? (There could be more than one correct choice.) A) The heavy dart goes higher than the light dart. B) The light dart goes higher than the heavy dart. C) Both darts reach the same maximum height. D) At the maximum height, both darts have the same gravitational potential energy. E) Both darts began moving upward with the same initial speed.