Which of these statements did you include in your answer? check all that apply. elements are pure substances with only one type of atom. the substances on earth are created when two or more elements are combined. because elements can combine to form compounds, more substances can be created on earth.

The correct answers are:

A. Elements are pure substances with only one type of atom.

B. The substances on Earth are created when two or more elements are combined.

C. Because elements can combine to form compounds, more substances can be created on Earth.

Answer : All the statements are correct.

Explanation :

For example : The molecule of hydrogen element is made from atoms of similar element (hydrogen).

For example : The carbon tetrachloride is made from atoms of different elements (carbon and chlorine) combined together in a fixed ratio by mass.

Hence, all the statements are correct.

the correct answer is

d) rocket launcher

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;