Which energy source is formed when organic matter is trapped underground without exposure to air or moisture?
a. natural gas
b. coal
c. oil
d. biomass fuels

when it gains or loses electrons

real, smaller and upside-down.   so the answer should be b.

he made 11 calls in one day

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles