Science and Technology Crossword 5

Click on a number in the crossword, write your answer, and then click "Enter". (Click "Hint" if you need help to get the next letter in each word.)
1    2    3   4    5   
    6      
        
7       8     
        
9     10       
       11   
12          

Across

1. Light particle
6. Do again
7. To absorb nutrients
9. Degree of compactness
12. Round, like a wheel

Down

1. Elements are listed in the _ _ _ _ _ _ _ _ table.
2. Atmospheric element
3. Spheres
4. Symbol for element "neon"
5. Our planet is in the _ _ _ _ _ system.
8. Sum of added numbers
10. Internal bodily cavity
11. Numbers are odd _ _ even.