What causes auroras?
A) sunlight reflected off meteor dust high in the atmosphere
B) micro meteorites burning up as they sweep along Earth's magnetic field
C) particles from the Sun colliding with and exciting atoms in our upper atmosphere
D) fluorescence by upper atmospheric hydrogen atoms
E) waves in the magnetic field creating an upper atmospheric laser-like effect
Correct Answer:
Verified
Q53: What do we mean when we say
Q54: What evidence do we have that Earth's
Q55: What is the dynamo model of Earth's
Q56: Why does the Moon not have a
Q57: Currents in Earth's molten iron core create
Q59: Analysis of volcanic emissions suggests that eruptions
Q60: Ozone
A) is an element.
B) is a molecule
Q61: The composition of Earth's atmosphere today is
Q62: The majority of Earth's atmosphere is found
Q63: What is the troposphere?
A) the layer of
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents