a large area of flat unforested grassland in southeastern Europe or Siberia
Astronomers use redshirts to track the rotation of our galaxies, tease out the subtle tug of a distant plant on its parent star, and measure the expansion rate of universe.
Answer:
70,000 wildfires per year
Explanation:
Climate change indicators and Wildfires in the Untied States are the sources for the data
Cultural hearths<span> are civilizations that have </span>cultural influence around the world. There are seven original culture hearths<span> that include West Africa, Meso america, the Nile River Valley, the Indus River Valley, the Wei-Huang Valley, the Ganges River Valley and Mesopotamia</span>
Answer:
the sun
Explanation:
the sun warms up the earth and the earth keeps its warmth
