Rocks in the earth's mantle contain a higher percentage of and than do rocks in the earth's crust.
a. iron and silicon
b. iron and magnesium
c. silicon and oxygen
d. magnesium and oxygen

In a the people elect the legislature, and the legislature chooses the head of government. question 5 options: parliamentary democracy communist state presidential democracy autocratic state

Did egypt invent wheels or sailboats

What primary role of regulatory agencies is the article excerpt referring to check all that apply