Ripples of Energy 1A wave is any movement that carries energy. Some waves carry energy through water. Others carry energy through gases, like air, or solid materials. If you drop a rock into a pool of water, a wave, or ripple of energy, skims across the pool's surface. In the same way, an underwater earthquake can release energy into ocean water. Then it carries a giant wave, or tsunami, across the surface until it hits land. 2If you hear a clap of thunder, sound waves (or vibrations) have carried the crashing BOOM to your ears. Sound waves speed through the air at about 1,100 feet (335 meters) per second. 3Light also travels through the air in waves. They travel at more than 186,000 miles (300 million meters) per second. So the light waves from a flash of lightning reach your eyes before that clap of thunder reaches your ears! 4Electrons travel in waves, too. They move back and forth in a solid wire, sending waves of electricity so you can turn on a light during the storm! 1. What is the author's most important purpose for writing the selection?

Ripples of Energy 1A wave is any movement that carries energy. Some waves carry energy through water. Others carry energy through gases, like air, or solid materials. If you drop a rock into a pool of water, a wave, or ripple of energy, skims across the pool's surface. In the same way, an underwater earthquake can release energy into ocean water. Then it carries a giant wave, or tsunami, across the surface until it hits land. 2If you hear a clap of thunder, sound waves (or vibrations) have carried the crashing BOOM to your ears. Sound waves speed through the air at about 1,100 feet (335 meters) per second. 3Light also travels through the air in waves. They travel at more than 186,000 miles (300 million meters) per second. So the light waves from a flash of lightning reach your eyes before that clap of thunder reaches your ears! 4Electrons travel in waves, too. They move back and forth in a solid wire, sending waves of electricity so you can turn on a light during the storm! ``2. Which question could best help someone figure out this author’s purpose?

Ripples of Energy 1A wave is any movement that carries energy. Some waves carry energy through water. Others carry energy through gases, like air, or solid materials. If you drop a rock into a pool of water, a wave, or ripple of energy, skims across the pool's surface. In the same way, an underwater earthquake can release energy into ocean water. Then it carries a giant wave, or tsunami, across the surface until it hits land. 2If you hear a clap of thunder, sound waves (or vibrations) have carried the crashing BOOM to your ears. Sound waves speed through the air at about 1,100 feet (335 meters) per second. 3Light also travels through the air in waves. They travel at more than 186,000 miles (300 million meters) per second. So the light waves from a flash of lightning reach your eyes before that clap of thunder reaches your ears! 4Electrons travel in waves, too. They move back and forth in a solid wire, sending waves of electricity so you can turn on a light during the storm! `3. Which might also have been an author’s purpose for the above selection?