What is the exact messuring system we use in science?

There are lots of exact measuring systems we use in science. Here are just a few measurement words you may find in chemistry and science

 ° Liter - Metric unit for measuring volume

 ° Gram - Metric unit for measuring mass

 ° Meter - Metric unit for measuring length

 ° Ruler, meter stick, tape measure - Tools used to measure length

 ° Thermometer - Tool used to measure temperature

  ↑   ↑   ↑  Hope this helps! :D

materials water oxygen those are the things i can think of in this moment.

answer; hydrologic cycle;