Science Outlines Crossword Puzzle

2. Substances change state because their ____ are arranged in a different way.
3. Compounds can only be broken apart by ____.
4. The ____ of an object is a measure of the force of gravity between Earth and the object.
6. Any substance that is formed by the ____ of two or more elements is called a compound.
7. A(n) ____ is the smallest unit of an element that retains the properties of the element.
8. The ____ of an object tells us how massive something is for its size.
9. The groups in Mendeleyev's table contained elements with similar ____ properties.
11. Materials with very low density and relatively great strength, called ____, are very good insulators against heat.
14. About three-fourths of the elements are ____.
15. A formula contains numbers below the elements called ____.
17. Anything that has mass and takes up space is ____.
18. As long as conditions such as ____ do not change, the density of a substance does not change.
19. A measure of how much space a sample of matter takes up is ____.

1. Every substance has its own particular melting point and ____.
5. When heat is removed from a boiling substance it ____.
6. Scientists write symbols for compounds called ____.
10. The basic building blocks of all matter are ____.
12. A measure of the amount of matter in an object is ____.
13. ____ are made up of molecules that have different kinds of atoms joined together.
16. The liquid in a ____ expands or contracts with changes in temperature.