The principle of conservation of matter states that matter is neither created nor destroyed, but it can
a. grow larger
b. leave earth
c. alter its shape
d. change its form

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?