Answer:
oxygen is a present in our atmosphere and mixed with other gases on the surrounding screen plants are also measure source of getting oxygen they take carbon dioxide from making their food by for the cities and give away oxygen in return
Explanation:
most of the earth oxygen comes from tiny Ocean plants are called phytoplaston
Answer:
The food coloring mixes through the hot water faster than it mixes with the cold water.
Explanation:
Pretty cool tbh lol, hope this helps!
Our main source of energy is the sun. True.
Answer:
Properties of transition elements
they are all metals and that most of them are hard, strong, and lustrous, have high melting and boiling points, and are good conductors of heat and electricity.
It is avogrado number. One molecue of magnesium has 6.023 x 10^23 atoms
