how can people who are marginalized in science push back against being left out?(help with explanations)

The velocity would be 2 

It can be classified based on its

Ithink about 50 % of an original isotope's number of atoms remain

For lesson: cameras, plant presses, newspaper, paper towels, clip boards, pencils, calculators, field guides, metric measuring tapes, paper, transect squares, colored pencils, ph meters, light meters, computers, etc.for extension: baggies for soil samples collecting, distilled water, hand shovels, beakers, boiled rice, microscopes, well microscope slides or regular microscope slides with cover slips