Transcript Slow and Fast Changes on Earth

Slow and Fast Changes on Earth
Science Chapter 6,
Lessons 7 -8, pp. C 58 – C 80
Lesson 7 – Slow Changes on Land
Weathering & Erosion
 Weathering (link)
(link)
 the process that crumbles, cracks, and breaks up rocks.
 Physical Weathering
o Water
o __________
o __________
 Chemical Weathering
o Acid rain
o Rust (oxidation)
 Biotic Weathering (link) (Hint: “bio-” means life)
o ___________ & ____________
 Erosion
 the process when weathered materials are carried away

___________, __________, __________, & __________
How do people change Earth’s surface?
 Forests are cut
 to make room for towns & cities
 to provide lumber for building materials
 Wetlands, like ponds and swamps are drained
 Mountains and hills are cut away
 to build roads
 Roads & parking lots do not let water soak into the earth. Instead it
washes away.
Read pp. C 66 – C 67 to learn ways humans can help prevent unnecessary erosion.
What does Bill Nye say?
 Part 1
 Part 2
 Part 3
Lesson 8 – Fast Changes on Land
Hurricanes, Tornadoes, Floods, Earthquakes, Volcanoes
 Do the Explore Activity on pg. C 69,
“How Do Gentle and Heavy Rains
Change Earth’s Land?”
 How do you think your results with the
models compare to the real world?
 ______________________
______________________
______________________
______________________
______________________
______________________
______________________
______________________
 Listen to the CD for pages C 70 – 73, then
match each term to its definition.
_____ hurricane
A. opening in the
earth’s surface
_____ tornado
B. sudden movement in
the earth’s surface
_____ flood
C. Huge flow of water
over usually dry land
_____earthquake D. Small powerful
windstorm over land
_____ volcano
E. violent, storm with
strong winds and
heavy rain
Read and discuss “A Mountain Blows Its Top” (Bright
Surprises pp. 222 – 227), then label the diagram below.
ash cloud - an ash cloud is the cloud of ash that
forms in the air after some volcanic eruptions.
conduit - a conduit is a passage through which
magma (molten rock) flows in a volcano.
crust - the crust is Earth's outermost, rocky layer.
lava - lava is molten rock; it usually comes out of
erupting volcanoes.
magma chamber - a magma chamber contains
magma (molten rock) deep within the Earth's crust.
side vent - a side vent is a vent in the side of a
volcano.
vent - a vent is an opening in the Earth's surface
through which volcanic materials erupt.
Label the Volcano Diagram
Definitions More on Volcanos
Watch “A Closer Look at Space: Earth”
(Discovery Streaming)
 Play “Mindjogger”
 Team
Members:____________________________________
____________________________________________
____________________________________________
 Final Score
 Test! Date: ___________________
*Use this packet as a study guide. See it online for youtube videos!