Explain how an aurora is produced
What will be an ideal response?
ANSWER: An aurora is produced by solar wind disturbing the magnetosphere. The disturbance involves high-energy particles within the magnetosphere being ejected into Earth's upper atmosphere, where they excite atoms and molecules. The excited atmospheric gases emit visible radiation, which causes the sky to glow like a neon light.
You might also like to view...
About 90% of all living fishes are contained within the order ____
a. Chondrichthyes b. Osteichthyes c. Teleostei d. Coelacanths e. Lamniformes
Why does wave height increase in shallow water?
a) The wave loses energy. b) Wave orbital motion is constricted by the sea bottom. c) Offshore winds blow the water higher. d) The waves tilt because the top gets ahead of the bottom. e) Waves move water toward the shore where it bunches up.
Which statement correctly describes the urban geography of Europe?
What will be an ideal response?
Which of the following statements best describes how this object may have formed?
A. Material accumulated into a sphere because of gravity, and it underwent nuclear fusion of hydrogen. B. A star ejected its outer envelope of gas and plasma. C. A supernova exploded, probably from the late-stage evolution of a high-mass star. D. Interstellar gas and dust accumulated due to gravity. Some pockets had enough mass to cause star formation.