The three main levels of the Earth are the core, mantle, and crust. The core is divided into the inner core and outer core, the mantle is located between the core and crust, and the crust is the outermost layer where we live.
The 3 types of gases in Earth's atmosphere are argon, oxygen and nitrogen.
The period number is equal to the number of energy levels. Elements of period 3 have 3 energy levels. Na,Mg,Al,Si are few elements in the period 3.
No, there are five main layers of Earth's atmosphere. They are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
The Earth's surface has three main levels: the crust, which is the outermost layer and is divided into continental and oceanic crust; the mantle, which lies beneath the crust and is composed of solid rock material; and the core, which is at the center of the Earth and is divided into the inner core (solid) and outer core (liquid).
The process most responsible for the increase in early Earth's atmospheric oxygen levels is photosynthesis. This is the process by which plants, algae, and some bacteria convert carbon dioxide and sunlight into oxygen and energy. Over time, the accumulation of oxygen from photosynthesis led to the rise in atmospheric oxygen levels.
the biosphere, the atmosphere, and the geosphere
the earths sea levels will rise
sun, water, wind.there may be others, but those are some of the most typical
The Sun.
Oil
nickel and iron
The # of levels in portal is not an exact number. there are the 20 main chambers 00-19, then there 3 or 4 escape levels, then a boss. It's a pretty short game but has lots of replay value.
they come from earths atmosphere and gases
Crust, mantle, and core
Rotation and Revolution.
Crust, mantle, and core
Crust, mantle, and inner core.