tierra

Lands in federal ownership that were obtained by the federal government through purchase, condemnation, gift, or exchange. One category of public lands.

tierra vírgen

農業; 水稲科学

Land that has not been used for agricultural purposes or disturbed by humans at all.

tierras públicas

農業; 農業政策および法令

As defined in the Federal Land Policy and Management Act, public lands are any land and interest in land outside of Alaska owned by the United States and administered by the ...

tierras tribales

農業; 農業全般

Land owned or traditionally belonging to a group of families, clans, or generations.

astrobiología

天文学; 惑星科学

Study of the origin, distribution, and destiny of life in the universe. These are interdisciplinary studies involving astronomers, astrophysicists, biologists, chemists, ...

organismo

天文学; 惑星科学

Any form of animal or plant life.

extrusivas

天文学; 惑星科学

Refers to igneous rocks erupted on the surface.

atmósfera

天文学; 惑星科学

Mixture of gases that surround and are gravitationally attached to a planet.

lava

天文学; 惑星科学

Fluid magma that flows onto the surface of a planet or moon; erupted from a volcano or fissure. Also, the rock formed by solidification of this material.