Why a Floating Ball Bobs Up and Down, Read and Answer

Make waves in a tub or shake a jump rope so your child can see crests and troughs before the wave pages. Shine a flashlight at a mirror in a dim room for the light pages, and tap out SOS together for the code pages. Check each page with the answer key.

Read why a beach ball on a pond rises and falls in one spot while the ripples carry energy past it. Amplitude is how high a wave rises from its middle to its top. The directions on the page read: Read the passage. Then, turn the page and answer the questions. On page 2: Circle the letter of the best answer for questions 1 to 3, and write the answers to questions 4 to 6 on the lines. The answer key covers the questions on page 2.

Yes, both. We made it for 4th Grade waves and light, and the page works the same whether it lands on a kitchen table or a center rotation. At home, most families go through it together and talk the answers out loud, and that talking is where most of the learning happens. In class it runs well as independent work while you pull a small group. Print one copy or thirty, whichever the day needs.

A wave is a repeating pattern of motion that carries energy, not matter, from place to place. A wave's amplitude is its height from the middle up to the crest, and its wavelength is the distance from one crest to the next. Stormy ocean waves have a bigger amplitude and carry more energy than calm ones (4-PS4-1).

We see an object when light bounces off it into our eyes. A lamp or the sun is a light source that makes its own light, while a book, a chair or the moon only reflects light. In a room with no light at all, nothing reflects into your eyes, so you cannot see (4-PS4-2).

Yes. Sound is a wave that travels through the air when something vibrates. Like a water wave, it carries energy to your ears while the air itself mostly stays in place. The 4th grade Sound waves sheet and the Light sheet from the Energy topic also appear on this page, next to the 12 waves and light sheets.

A code is a pattern that carries a message, as long as the sender and the reader both know what each signal means. Morse code turns letters into short and long signals, and SOS is three short, three long and three short. A phone turns each letter into a code of 1s and 0s (4-PS4-3). Every sheet has an answer key.