Day 5
How do igneous rocks form?
Igneous rocks form when molten
rock (magma or lava) cools and
hardens.
How do metamorphic rocks form?
Metamorphic rocks form when an
existing rock changes due to heat
and/or pressure.
Daily Warm-Up Exercises
1
Igneous and Metamorphic Rocks
(Part 1, steps 1-6)
Investigation 8
One Rock to Another
2
Rock
Identification
A and B
Using the hand lens and
the acid, complete the
Rock number and
Description columns.
Use Resource Book
pages 43-46.
3
Rock Identification A (#11 - 13)
11
igneous
granite
•pink, white, black, grey
•shiny flat crystals
•dense
• grey, black, white
• dense
basalt, fine-grained • fine-grained
intrusive
igneous
12
13
igneous
basalt, vesicular
• black, grey
• holes of various sizes
• dense
extrusive
extrusive
4
Rock Identification A (#16 - 19)
16
igneous
obsidian
igneous
17
pumice
19
igneous
scoria
• black, dark brown
• very shiny, like glass
• forms sharp edges
extrusive
•grey, tan with holes
•not very dense
•would float in water
extrusive
• browns, reds
• holes like pumice
• does not float in water
extrusive
5
Rock Identification A (#21)
21
igneous
tuff
• mostly white, some tan
• chalky, grainy
extrusive
6
Rock Identification B (#1 - 15)
1
metamorphic
•black, shiny
schist
metamorphic
14
• white, tan, black with
lines
comes
from shale
or granite
• fizzes in acid
• white, crystalline
comes
from
limestone
gneiss
15
metamorphic
marble
comes from
shale or
mudstone
7
Rock Identification B (#18 - 20)
18
metamorphic
• pink, crystalline
comes from
sandstone
• black, hard, smooth
comes
from shale
quartzite
metamorphic
20
slate
8
Real vs. Diagram
Exercise 8.1
9
What is this?
10
Are these both cats?
11
Look at page 20 in your CaSE
Book Student Resource Book
12
Relative Scale and
Magnification
Exercise 8.2
13
Relative Scale and
Magnification
Exercise 8.3
14
Are these objects the same
size in real life?
15
What Size Is This?
16