Answer:
hypothesis=In science, a hypothesis is an idea or explanation that you then test through study and experimentation. Outside science, a theory or guess can also be called a hypothesis. A hypothesis is something more than a wild guess but less than a well-established theory. ... Anyone who uses the word hypothesis is making a guess.
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experiment=An experiment is a procedure carried out to support, refute, or validate a hypothesis. ... Uses of experiments vary considerably between the natural and human sciences. Experiments typically include controls, which are designed to minimize the effects of variables other than the single independent variable.
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observation=an act or instance of viewing or noting a fact or occurrence for some scientific or other special purpose: the observation of blood pressure under stress. the information or record secured by such an act. something that is learned in the course of observing things: My observation is that such clouds mean a storm.
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evidence=noun. that which tends to prove or disprove something; ground for belief; proof. ... data presented to a court or jury in proof of the facts in issue and which may include the testimony of witnesses, records, documents, or objects.
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4 benefits to liquid ink are
Ballpoint. Ink Base: Oil. Pigment or Dye: Pigment. Ink Properties: ...
Drawing (Dip Pen) Ink Base: Water. Pigment or Dye: Dye. Ink Properties: ...
Fountain. Ink Base: Water. Pigment or Dye: Dye. ...
Rollerball. Ink Base: Water. Pigment or Dye: Both. ...
Gel. Ink Base: Water. Pigment or Dye: Pigment.