An area of a mountain has rocks with small cracks between them in the winter water flows into the cracks and freezes the expansion of water when ice forms causes the rocks to break down into smaller pieces is this and example of weathering or is it an example of erosion? how do you know?

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Consider the classification levels of a human. eukarya ,animalia ,chordata ,mammalia ,primates, hominidae ,homo ,sapiens .which is the most specific taxonomic level in the classification system above? a sapiens b homo c hominidae d primates

24. how are vaccines used to keep people healthy?