Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
The Earth I) How does the motion of the earth cause day and night? The Earth rotates on its axis. When the side is facing the sun it is day and when it is facing away from the sun it is night. This spinning in a circle on its axis is also called ROTATION _________________. II) In addition to rotating on its axis, the Earth also travels around Orbit the sun in a path called an ______. This motion around the sun along its orbit is REVOLUTION called ____________. The other planets in our solar system also revolve around, or orbit, the sun. The Earth revolves around the sun in ______ 365 1/4 days. Mercury’s orbit is 88 days III) The Earth’s Interior 3 distinct The Earth’s Interior is divided into ___ layers according to the composition of its materials. 1. The Crust OUTERMOST -The _____________ layer of Earth. - It is 5 km (bottom of ocean) – 100 km thick 2. The Mantle BELOW - Lies __________ the crust (30 - 2,900 km below the surface) - made from dense rock 70% of Earth's volume. - occupies about ____ - temperatures range between 100°C 4,000°C at the edge of core to over _______ 3. The Core - the center of our Earth OUTER - _________ core is liquid, made from a metallic nickel-iron mixture SOLID due to the enormous - inner core is ________ pressure at the center of the planet - ranges 2900 km - almost 6400 km deep 2900 to 5100 km = Outer core 5100 to 6378 km = Inner core