Transcript FOSS Pebbles, Sand and Silt

FOSS
Pebbles, Sand and Silt
Investigation 1
Set B
A gray, smooth rock that was once
hot, liquid lava that came out of a
volcano. (noun)
• 1. I have a piece of basalt in my rock
collection.
• 2. I saw basalt when I was walking up
the volcano.
A group of objects to be see,
studied or kept together. (noun)
• 1. Museums have a collection of rocks
for us to look at when we visit.
• 2. Toad has a funny collection of
buttons on his jacket.
A piece of solid, often transparent
material with shiny, flat surfaces
that can be identified by its
special shape or pattern. (noun)
• 1. I think that a crystal looks like a
diamond.
• 2. I saw a bright crystal sticking out
of the wall of the cave.
Not sharp or shiny. (adjective)
• 1. I can’t write with my pencil
anymore because the tip is dull.
• 2. The dull gray rocks that wash up
from the ocean have been smoothed
by the water and sand.
A scientist who studies Earth and
rocks. (noun)
• 1. A geologist came to my class to
teach us about rocks.
• 2. I want to be a geologist and work
on volcanoes when I grow up.
A building in which collections of
scientific, historical or artistic
value are studied and exhibited.
(noun)
• 1. I went to see the dinosaur fossils
at the museum.
• 2. There is a large collection of rocks
at the Museum of Natural History.
Having sharp edges or corners.
(adjective)
• 1. It is much easier to write with a pointed
pencil.
• 2. Be careful! You can cut your hand if you
hold the pointed edges of the rock too
tightly.
Bumpy; not smooth
(adjective)
• 1. I hit my head on the roof of the
car when we drove down a bumpy
road.
• 2. The surface of basalt, scoria and
tuff feel bumpy.
A reddish, bubbly rock that was
once the bubbly top of lava. (noun)
• 1. I bet that the lava was really hot
before it became scoria.
• 2. The scoria I saw at the museum
looks like hard red bubbles.
A light, soft rock that has ashes in
it from the fires of a volcano.
(noun)
• 1. The tuff I bought is as light as
cotton.
• 2. How did the tuff get ashes in it
before it became a rock?
Having lines of different shades or
colors. (adjective)
• 1. A zebra is black and white striped.
• 2. Some striped rocks have lines of
bright colors.
Flat, level; not rough. (adjective)
• 1. The smooth rock I found was in
the river for a long time.
• 2. The skin of my apply has no bumps
and is very smooth.