Answer:
What is a combination of sand and salt that can be separated rather
easily called?
a mixture
Explanation:
A mixture has to do with two or more different substances added together, salt and sand is a typical example of such mixture
Answer:
Ion
Explanation:
An Ion is exactly as stated it bears either a positive or negative charge.
Answer:
The return of blood to the heart is assisted by the action of the skeletal- muscle pump. As muscles move, they squeeze the veins running through them. Veins contain a series of one-way valves, and they are squeezed, blood is pushed through the valves, which then close to prevent backflow.