A rock discovered near your home is known to be an igneous rock. The rock was formed as magma cooled inside the earth's crust. Is this rock an intrusive or extrusive igneous rock? Explain your answer

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.