How do is rocks compared to rocks on the surface

Different rocks have different characteristics because of their minerals, the ways in ... In this first investigation, your students will use their senses to investigate. ... to handle the rock samples and describe their relative weights and textures. ... silt, clay, and gravel), or the remains of living things found at the surface of the Earth.

Explanation:

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.