National Geographic Science - Spanish Sampler - Grade K
Issue link: http://www.e-digitaleditions.com/i/157323
Ciencias de la Tierra Gran idea Gran libro El día y la noche Pregunta sobre la gran idea SECTION 3 ¿En qué se diferencian el día y la noche? Lesson 5 Close and Far Away por Susan Halko Objectives Science Students will be able to: • Observe that things can be big and things can be small as seen from Earth. • Observe that some things are far away and some are nearby as seen from Earth. • Recognize that the sun appears larger than other stars because it is closer to Earth than other stars. 1 Introduce Tap Prior Knowledge Have students identify and compare things that are big and small. Ask them whether they think stars are big or small and why they think so. Set the Purpose and Read Read the heading on page 18 aloud. Tell students to listen as you read to find out why big things can look tiny from Earth. 2 Teach Read Aloud and Discuss •Read page 18 aloud. Then point to the two photos of the planes and read their captions. Ask: ¿En qué foto el avión se ve más pequeño? (the top photo) ¿Por qué se ve más pequeño cuando vuela? (because it is far away) •Now read page 19 aloud. Ask students to identify the stars and sun in the photo. Then read the caption aloud. Point to one of the stars at night. Ask: ¿Qué aspecto tiene esta estrella? (a tiny point of light) ¿La estrella es realmente así de diminuta? (no) ¿Por qué no? (The star looks tiny only because it is very far away.) •Have students compare the photos of the sun with those of the other stars. Ask: ¿En qué se parecen el Sol y otras estrellas? (Both are bright.) ¿En qué se diferencian? (The sun seems much larger and brighter.) Explain that, like planes on the ground and in the sky, stars seem different when they are close from when they are far away. T18 Big Ideas Big Book Raise Your SciQ! Sun Distance and Size Although the sun is the closest star to Earth, it is still millions of miles away. If a jet airplane could fly to the sun at its normal speed, the trip would take over 600 years! The sun is also much larger than it appears in the sky, and it is much larger than Earth. If a bowling ball was used to model the sun, then Earth would be the size of an apple seed.