1. Which rock sample had the most porosity? Which sample had the least? 2. How much empty space was there in the medium-sized rock sample?

3. How much time did it take the water to flow through the gravel? The sand? What about the dirt?

4. Which sample is the most permeable

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

multiplying and dividing the two decimals and the eqations by the same number of the overalls