Primary sources can be described as those sources that are closest to the origin of the information. They contain raw information and thus, must be interpreted by researchers. Secondary sources are closely related to primary sources and often interpret them.
The Earth's Moon is about 4.35 billion years, which means it existed when the solar system first existed. Hope this helps!
Europe enjoys a high standard of living because it means the level of wealth, comfort, material goods and necessities available to a certain socioeconomic class in a certain geographic area would usually be high.
Yes it is true.
Hope this helps
Hello!
A fire is hot enough to produce visible light. But, a source of heat, like a human, will produce infrared light, which is invisible.
Your answer would be B. Invisible
I hope this helps!
