Rica wants an essential element for building and maintaining strong bones and teeth. What element does Rica needs to intake? *

a. Magnesium
b. Calcium
c. Sodium
d. Helium

Rica accidentally mixed water and oil in one glass, she wants to separate it immediately. What method she can used to separate the components of a mixture? *

a. Evaporation
b. Distillation
c. Filtration
d. Decantation​