1)

According to Webster’s New Collegiate Dictionary, the definition of science is “knowledge attained through study or practice,” or “knowledge covering general truths of the operation of general laws, esp. as obtained and tested through scientific method [and] concerned with the physical world.”

2)A bias is a prejudice in a general or specific sense, usually in the sense for having a preference to one particular point of view or ideological perspective. However, one is generally only said to be biased if one’s powers of judgment are influenced by the biases one holds, to the extent that one’s views could not be taken as being neutral or objective, but instead as subjective. A bias could, for example, lead one to accept or deny the truth of a claim, not on the basis of the strength of the arguments in support of the claim themselves, but because of the extent of the claim’s correspondence with one’s own preconceived ideas. This is called confirmation bias.

Bias – a particular tendency or inclination, esp. one that prevents unprejudiced consideration of a question; prejudice.

Put them together and you’ll have part 2 of question 2.

then google it…