Science

3. The measure of how easily a substance could be stretched into wire.
5. Includes all solid, liquid, and gaseous water on the Earth.
8. Equivalent to 3.26 light years.
10. Neutral subatomic particles with a relative mass of 1 and located in the nucleus of the atom.
12. Includes all of the solid surface of the land (29% of Earth's surface) as well as the various layers of Earth's interior.
13. A measure of the angular distance, measured from 0 to 90 degrees, of a celestial object above the observer's horizon.
15. A group of individuals of the same species living in the same area.

1. The measure of how easily a liquid flows.
2. Subatomic particles with a negative charge, a relative mass of approximately 1/2000 of the mass of a proton or a neutron, and located in the orbits of the atom.
4. Subatomic particles with a positive charge, a relative mass of 1, and located in the nucleus of the atom.
6. Composed of only one type of element.
7. The amount of matter (mass) per unit of volume.
9. The rate in which electrons move past a given point in the circuit.
11. The ability to slow down the movement of electrons.
14. Aquatic ecosystems that have directional flow of water, and include rivers and streams.