<span>A portion of the atmosphere that becomes warmer than surrounding air will expand and rise. The warmer atmosphere the more space between the molecules. Therefore, warmer atmosphere </span><span>expands to allow more space for the molecules. Cool air on the other hand, contracts because the molecules in cool air need less space.</span>
Explanation:
Ummm i think a timer or clock?
Answer:
B) 89500 km
Explanation:
speed = distance / time
time= 3h 58 min = 30+58/60= 30.966 h = 31 hrs (approxx)
250= distance / 31
250× 31= distance
distance = 7750 ( approxx)
but none of the given options is 7750 km so we will choose the answer nearest to it,
therefore 89500km is the right answer
Reaction is the answer. If you're wondering why, all you need to do is look up the definitions of the words.
Earth, the planet:
1. Collision of Earth with Mars-sized planet.
2. Formation of the Moon and its gravitational effects.
3. Cooling and solidification of Earth's molten outer surface.
4. Period of intense asteroid bombardment.
5. Build-up of liquid water on Earth's surface.
6. Appearance of continents.
7. Start of plate tectonics.
8. Appearance of photosynthetic bacteria.
9. Change in atmosphere due to photosynthetic bacteria.
10. Widespread appearance of complex organisms.
11. Adaptation of plant and animal life to land.
12. Periods of intense, long-lasting volcanic activity.
13. Re-positioning of Earth's continents and oceans, and its
resultant effect on weather patterns and ocean circulation.
14. Changes in Earth's magnetic fields.
15. Changes in Earth's orientation to the sun.
16. Random devastating meteorite impacts.
17. Glaciations, floods, earthquakes.
Life: Abundance, Diversity and Extinction of different species in response to changing climatic, ecologic and edaphic conditions.
