1. Which of the inner planets has an internal structure similar to Earth's and has the hottest surface of any planet in our solar system?
2. Which of the following statements about similarities among the inner planets is true?
3. How did planetesimals form planets?
4. What do the outer planets have in common?
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1. The inner planet that has an internal structure similar to Earth's and the hottest surface in our solar system is Venus.
2. The true statement about similarities among the inner planets is that they are all terrestrial planets, meaning they are primarily composed of rock and metal.
3. Planetesimals formed planets through a process called accretion. This process began when dust and ice particles in the early solar system collided, sticking together and forming larger objects known as planetesimals. Over time, these planetesimals continued to collide and merge, eventually forming the planets we see today.
4. The outer planets, also known as gas giants, have several things in common. Firstly, they are composed primarily of gas, such as hydrogen and helium, with a relatively small rocky core. They also have thick atmospheres, many moons, and ring systems. Additionally, they are located further away from the Sun compared to the inner planets.
1. The inner planet that has an internal structure similar to Earth's and the hottest surface in our solar system is Venus. To determine this, you can refer to scientific literature or resources on the internal structures and surface temperatures of the inner planets. You can also use reputable websites or astronomy books that provide accurate information about the physical characteristics of the planets in our solar system.
2. To determine which statement about similarities among the inner planets is true, you would need to assess the given statements and evaluate their accuracy. These statements could include facts about the overall composition, atmosphere, or physical features of the inner planets (Mercury, Venus, Earth, and Mars). Comparing these statements against reputable sources of information such as scientific articles or astronomy textbooks will help confirm the accuracy of the statement.
3. Planetesimals are small rocky or icy bodies that formed in the early stages of the formation of our solar system. They are thought to have originated from the protoplanetary disk, a rotating disk of gas and dust surrounding the young Sun. These planetesimals collided and merged, gradually growing in size over millions of years to form planets. This process is known as accretion. As planetesimals accumulated more mass, their gravity increased, allowing them to attract more material and eventually become planets.
4. The outer planets, also known as the gas giants, have several characteristics in common. First, they are composed primarily of hydrogen and helium, unlike the inner planets that are predominantly rocky. They also have much larger sizes and masses compared to the terrestrial planets. Additionally, the outer planets are all surrounded by thick atmospheres, with features such as bands and storms. They have numerous moons, with some having dozens or even hundreds of satellites. Another common trait is that the outer planets have rings, although they vary in composition and prominence. These shared features distinguish the outer planets from the inner planets in our solar system.