Question

stars also change color as they get older. young stars are made of mostly hydrogen and helium. they burn their gases quickly and shine blue or white. then, as the star gets older, it starts forcing helium atoms together to make even heavier elements, like carbon and oxygen. carbon is what makes up diamonds and is also important for all living things. oxygen is what we breathe to stay alive! older stars cool down and look orange or red. when stars reach the end of their lives, some explode and send their gases into space. those gases can later help make new stars and planets. next time you see stars at night, think about what their colors mean. the sky is full of stories written in color! reading check 8. what happens when stars get very old? a. they turn into planets b. some combine with other stars c. they stop shining d. some explode and send gas into space 9. what elements do older stars make? how? 10. why do stars have different colors? a. because of their shapes b. because of their temperature c. because of their distance from earth d. because of their size 11. when a star explodes, what happens to the elements and gas?

Explanation:

• Para la pregunta 8, el texto dice que cuando las estrellas llegan al final de sus vidas, algunas explotan y envían gases al espacio.
• Para la pregunta 9, el texto indica que las estrellas más ancianas forzan átomos de helio juntos para formar elementos más pesados como carbono y oxígeno.
• Para la pregunta 10, el texto sugiere que las estrellas tienen diferentes colores según su edad y temperatura, siendo las estrellas jóvenes más calientes y azul - blancas y las estrellas ancianas más frías y naranja - rojas.
• Para la pregunta 11, el texto dice que los gases que se liberan cuando una estrella explota pueden ayudar a formar nuevas estrellas y planetas.

Answer:

1. D. Some explode and send gas into space
2. Forman elementos como carbono y oxígeno al forzar átomos de helio juntos.
3. B. Because of their temperature
4. Pueden ayudar a formar nuevas estrellas y planetas.