Match each energy source with the correct description
1. creates radioactive waste
wood
2. uses the kinetic energy of water
oil
3. spills can destroy aquatic ecosystems
hydroelectric power
4. burning releases carbon dioxide into the air
nuclear power
5. renewable resource that can be burned
coal

wood- renewable resource that can be burned

oil- spills can destroy aquatic ecosystems

hydroelectric power- uses the kinetic energy of water

nuclear power- creates radioactive waste

coal- burning releases CO2 into the air

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.