Question

gravity keeps earth, the other planets, and everything else in the solar system in orbit around the sun. the sun contains over 99% of the solar system’s matter, making it much more massive than jupiter, saturn, and all other objects in the solar system combined! the sun’s gravity is strong enough to keep all these objects in orbit around it and hold the entire solar system together.

image of solar system model

the planets orbit the sun in this model of the solar system. if this model were shown to scale, several planets would be too small to see compared to the sun!
select the true statements.

• the solar system is held together by the sun’s gravity.
• if the planets suddenly lost all their forward motions, they would most likely crash into the sun.
• the vast majority of the solar system’s matter is contained in the sun.
• gravity keeps the sun and the planets in the solar system in orbit around earth.

Explanation:

• Para la primera afirmación: El texto dice "The Sun’s gravity is strong enough to keep all these objects in orbit around it and hold the entire solar system together", así que es verdadera.
• Para la segunda afirmación: Si los planetas pierden su movimiento hacia adelante, la gravedad del Sol los atraería, haciendo que chocaran con el Sol, lo que es lógico según la física de la gravedad.
• Para la tercera afirmación: El texto indica "The Sun contains over 99% of the solar system’s matter", por lo que la mayoría de la materia del sistema solar está en el Sol, es verdadera.
• Para la cuarta afirmación: Sabemos que los planetas (incluyendo la Tierra) orbitan alrededor del Sol, no al revés, así que esta es falsa.

Answer:

A. The solar system is held together by the Sun’s gravity.
B. If the planets suddenly lost all their forward motions, they would most likely crash into the Sun.
C. The vast majority of the solar system’s matter is contained in the Sun.