The 4 Realms of Earth

Solve the cross word puzzle:

Across: 1) Colourless, odourless, taste less ___________________

2) Essential for respiration ____________________

3) Gaseous form of water _______________

4) Contain 75% of the atmosphere’s gases _______________

Down: 5) Electrically charged particles ________________

6) Holds the universe in placed ________________

7) Gas that absorbs ultra-violet rays from the sun _____________

8) They moves