If you look on the label of your toothpaste, you will see that many contain the mineral fluorite. Your teeth, ironically, are made up of the mineral apatite. Based on what you
know about hardness (and using the table below of Moh's Hardness Scale below),
explain why fluorite is used in toothpaste rather than a mineral like quartz. In your
response, why fluorite is used and include two examples of why other minerals would
not be as beneficial.

What is the difference between bacterial infections and viral infections?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

The bacteria inside a tube worm would be analogous to what organism in the ocean ecosystem near the waters surface? a. photosynthetic algae b. shrimp c. clown fish d. parasitic lamprey