I WILL GIVE BRAINLEIST/ Use the visual and the table to answer the question. A black and white rock with no shine is shown. The rock appears to have a rough texture. (Item Mohs Hardness fingernail 2.5 penny 3 knife 5.1 steel nail 6.5 ) You have found the mineral shown in the picture. A knife won’t scratch it, but a nail will. Describe at least four properties that would help you identify the mineral.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.