â¢ Analyzing light from the planet tells us about its atmosphere. Density: We determine a planet's makeup primarily by learning its density. For example, Earth's density is about 5.5 times water's density. So, if we learn that a new planet has about the same density as Earth's, we might guess it is similar to Earth.: Scientists determine a planet's ingredients in several ways, depending partly on how close it is to Earth. Planets within our solar system: For planets like Mars that robots have visited, we analyzed rock and atmospheric samples on the spot. We also measure the planet's magnetic properties.
There is an enormous difference between the physical properties of carbon dioxide and silicon dioxide (also known as silicon(IV) oxide or silica). Carbon dioxide is a gas whereas silicon dioxide is a hard high-melting solid.The other dioxides in Group 4 are also solids.here is an enormous difference between the physical properties of carbon dioxide and silicon dioxide (also known as silicon(IV) oxide or silica). Carbon dioxide is a gas whereas silicon dioxide is a hard high-melting solid.
In dimeric silicon dioxide there are two oxygen atoms bridging between the silicon atoms with an Si-O-Si angle of 94Â° and bond length of 164.6 pm and the terminal Si-O bond length is 150.2 pm. The Si-O bond length is 148.3 pm, which compares with the length of 161 pm in Î±-quartz.he solubility of silicon dioxide in water strongly depends on its crystalline form and is 3â4 times higher for silica than quartz; as a function of temperature, it peaks at about 340 Â°C.