Igneous rocks tend to weather slowly because it is hard for water to penetrate them.
(Igneous rocks; tend; to weather slowly because it is hard) (Igneous rocks; to weather slowly; because it is hard for water to penetrate them) (water; to penetrate; them)
Igneous rocks Igneous rocks water
tend to weather slowly to penetrate
to weather slowly because it is hard
because it is hard for water to penetrate them
them