There is good evidence that variation in solar energy, as evinced ...

[genevieve1028]

There is good evidence that variation in solar energy, as evinced by sunspot activity cycles, is responsible for short-term climatic variations.
  Indicate whether the statement is true or false

Question 2

Discuss what volcanologists look for when trying to determine if a volcano is about to erupt.

[juiceman1987]

Answer to Question 1

False

Answer to Question 2

Volcanologists monitor and measure volcanoes they think might erupt. They look for any evidence that magma is moving upward in the volcano, such as changes in the slope or horizontal distances of volcanic cones. They also look for changes in magnetic or electrical fields and for gas emissions. Most importantly, they look for harmonic tremors. These are not the sharp earthquakes that commonly occur but they can last for hours and indicate magma movement.