Question

planets are large, roughly spherical objects that orbit stars. their orbits tend to be nearly circular or oval - shaped. in the solar system, planets orbit the sun.
there are two types of planets in the solar system: rocky planets and giant planets. rocky planets are mostly made of rock and metal. they have a diameter between 4,800 and 12,800 kilometers. giant planets are mostly made of gas and ice. they have a diameter between 49,000 and 143,000 kilometers.
both types of planets can have moons and atmospheres. giant planets can have rings. rocky planets can have craters and volcanoes.
select the true statements about planets in the solar system.

• giant planets are mostly made of gas and ice.
• planets are irregular in shape.
• some rocky planets are larger than giant planets.
• only rocky planets have moons.

Explanation:

1. For "Giant planets are mostly made of gas and ice": The text says "Giant planets are mostly made of gas and ice", so this is true.
2. For "Planets are irregular in shape": The text states "Planets are large, roughly spherical objects", so "irregular" is wrong.
3. For "Some rocky planets are larger than giant planets": Rocky planets have diameter 4,800 - 12,800 km, giant 49,000 - 143,000 km. So rocky are smaller, this is wrong.
4. For "Only rocky planets have moons": The text says "Both types of planets can have moons", so this is wrong.

Only the first statement is true.

Answer:

Giant planets are mostly made of gas and ice.