The president is responsible for
a. appointing senators
b. amending the constitution
c. declaring war
d. commanding the u. s. armed forces

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

Which statement is correct ? a. aborigines were the first people to settle australia and new new zealand. b.aborigines were the first people in australia,and maori were the first people in new zealand c. the maori were the first people in australia, and aborigines were the first people in new zealand . d.the aborigines and the maori descended from the polynesians, the first people to settle australia and new zealand.