They are electromagnetic waves because mechanical waves have to be physically created by something, while electromagnetic waves are just emitted without any effort or force.
One thing scientists in the late 1700s could determine about the fossils they were finding were fossils in the upper layers were younger than fossils in lower layers. The correct answer is A.
5.972 × 10^24 kg is the correct answer
Answer: It depends on the season
Explanation:
In summer Northern Hemisphere is hot and Southern Hemisphere is cold In Winter Northern Hemisphere is cold and Southern is hot . Fall and spring are medium tempature on both sides
yo its the Vatican City in Europe
