Aproperly written hypothesis to be tested in a scientific study must be and

Experimentation and deductive method

Explanation: Hypothesis is the document containing the explanation about any particular phenomena.The testing of hypothesis is made for the evaluation to determine whether it is true or not.

Testing can be done by using experimentation and deductive method .Experimentation involves researching about the hypothesis content and deductive method is the logical technique base on already existing hypothesis and then evaluating the  current hypothesis.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.

the answer is b.) hydrogen bonds between bases.