Specimen No.25 crystallized from
 *a felsic magma.
 an intermediate magma.
 a mafic magma.
 an ultramafic magma.
 none of the above.

Specimen No.25 is
 gabbro.
 diorite.
 syenite.
 gray granite.
 *red granite.

Specimen No.26 has 
 a pegmatitc texture.
 *a phaneritic texture.
 an aphanitic texture.
 a porphritic texture.
 a glassy texture.

Specimen No.26 crystallized from 
 *a felsic magma.
 an intermediate magma.
 a mafic magma.
 an ultramafic magma.
 none of the above. 

Specimen No.26 is
 gabbro.
 diorite.
 syenite.
 *gray granite.
 red granite.

Specimen No.27 is
 an ultramafic igneous rock.
 a mafic igneous rock.
 an intermediate igneous rock.
 *a felsic igneous rock.
 none of the above.

Specimen No.27 has 
 a pegmatitc texture.
 a phaneritic texture.
 an aphanitic texture.
 *a porphritic texture.
 a glassy texture.

Specimen No.27 is
 *rhyolite porphyry. 
 rhyolite.
 andesite.
 basalt.
 pumice.

Specimen No.28 is
 an ultramafic igneous rock.
 a mafic igneous rock.
 an intermediate igneous rock.
 *a felsic igneous rock.
 none of the above.

Specimen No.28 has 
 a pegmatitc texture.
 a phaneritic texture.
 *an aphanitic texture.
 a porphritic texture.
 a glassy texture.

Specimen No.28 is
 rhyolite porphyry. 
 *rhyolite.
 andesite.
 basalt.
 pumice.

Specimen No.29 is
 rhyolite.
 andesite.
 basalt.
 pumice.
 *obsidian.

Specimen No.30 is
 rhyolite.
 andesite.
 basalt.
 *pumice.
 obsidian.

Specimen No.31 contains an abundance of
 *K-feldspar.
 quartz.
 biotite.
 hornblende.
 none of the above.

Specimen No.31 is (since this is a hard question, the answer is c )
 gabbro.
 diorite.
 *syenite.
 gray granite.
 red granite.

Specimen No.32 has
 a pegmatitc texture.
 *a phaneritic texture.
 an aphanitic texture.
 a porphritic texture.
 a glassy texture.

Specimen No.32 crystallized from
 a felsic magma.
 *an intermediate magma.
 a mafic magma.
 an ultramafic magma.
 none of the above.

Specimen No.32 is
 gabbro.
 *diorite.
 syenite.
 gray granite.
 red granite.

Specimen No.33 is
 an ultramafic igneous rock.
 a mafic igneous rock.
 *an intermediate igneous rock.
 a felsic igneous rock.
 none of the above.

Specimen No.33 is
 rhyolite.
 *andesite.
 basalt.
 pumice.
 obsidian.

Specimen No.34 crystallized from
 a felsic magma.
 an intermediate magma.
 *a mafic magma.
 an ultramafic magma.
 none of the above.

Specimen No.34 has
 a pegmatitc texture.
 *a phaneritic texture.
 an aphanitic texture.
 a porphritic texture.
 a glassy texture.

Specimen No.34 is
 *gabbro.
 diorite.
 syenite.
 gray granite.
 red granite.

Specimen No.35 is
 an ultramafic igneous rock.
 *a mafic igneous rock.
 an intermediate igneous rock.
 a felsic igneous rock.
 none of the above.

Specimen No.35 is
 rhyolite.
 andesite.
 *basalt.
 pumice.
 obsidian.