Answer:
1. hydrogen Nitrogen Lead Mercury
2. Phytoplankton
3. About 71 percent of the Earth's surface is water-covered, and the oceans hold about 96.5 percent of all Earth's water. Water also exists in the air as water vapor, in rivers and lakes, in icecaps and glaciers, in the ground as soil moisture and in aquifers, and even in you and your dog.
Explanation:
Did you know that more than half of the oxygen on earth is produced by these tiny one-celled plants in the surface of the ocean called phytoplankton?
hope this help
Answer:
Correct answer is D. Tourism
Explanation:
Only option D is correct because most of the islands in Oceania are rather small, and therefore it is impossible to develop any of the mentioned industries, except tourism. Due to beautiful beaches, awesome climate tourism is the major developing force of this area.
Answer:
Weathering of rocks is the breaking down or dissolving of rocks/minerals, also known as erosion
Explanation:
