When Hitler continued his aggression, Chamberlain pledged Britain to defend Poland's independence if the latter were attacked, an alliance that brought Britain into war when Germany attacked Poland in 1939.
FIND OUT MORE. The Earth is covered in a layer of solid rock called the crust. Rocks are either SEDIMENTARY, IGNEOUS, or METAMORPHIC. Almost all rocks made of minerals, but different rocks contain different mixtures of minerals.Granite, for example, consists of quartz, feldspar, and mica.IND OUT MORE. The Earth is covered in a layer of solid rock called the crust. Rocks are either SEDIMENTARY, IGNEOUS, or METAMORPHIC. Almost all rocks made of minerals, but different rocks contain different mixtures of minerals.
The lithosphere is Earth's outermost layer, composed of rocks in the crust and upper mantle that behave as brittle solids. The rigid lithosphere sits on top of the asthenosphere, a layer of the mantle in which rocks are hot and deformable.The lithosphere is broken into large pieces called plates, which are made up of either seafloor lithosphere (mostly basalt) or continental lithosphere (less dense rocks, like granite).he rigid lithosphere sits on top of the asthenosphere, a layer of the mantle in which rocks are hot and deformable. The lithosphere is broken into large pieces called plates, which are made up of either seafloor lithosphere (mostly basalt) or continental lithosphere (less dense rocks, like granite).