Transcript Ch. 10 Section 1

WELCOME TO SCIENCE 11/13
 Come up to the cart and get a soil sample and a tray.
 Today’s Schedule
 1. Soil Samples
 2. Ch. 10 Section 1 Notes/Discussion
What makes up your soil?
Science Starter: Monday, 9/16
 Which of the following structures can be found in the
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plant cell but not in the animal cell.
A. Vacuoles
B. endoplasmic reticulum
C. mitochondria
D. cell wall
This Week’s Schedule
 This week we will begin our first full chapter from
the book: WEATHERING!
 We will begin the Directed Reading Packet and it will
be due early next week.
 On Wed. we will be going outside for the Weathering
Tour. Dress Appropriately!
 Friday will be the Weathering Tour Quiz.
Have these places always looked like they
do in these pictures?
What has caused these places to change
the way they look?
What process changes the way Earth looks
the most?
 Weathering
 The breaking down of rock into small pieces.
Mechanical Weathering
 Physically breaking rock into smaller pieces.
 How can this happen?
 Wind, Water, Ice, Gravity, and Organisms
How do wind, water, and gravity cause
weathering?
 Abrasion
 The action of rocks and sediment grinding against
each other and wearing exposed surfaces.
 Geology Rocks:
How do wind, water, and gravity cause
weathering?
 Ice
 Ice Wedging- Water gets into cracks in rocks.
When the water freezes, it expands, causing the crack
to get bigger.
 Weathering
Can plants & animals cause weathering?
 YES!!!
 Plants
 Roots can grow into a crack causing the crack to get
bigger and bigger.
Can plants & animals cause weathering?
 Animals
 As animals burrow into the ground, they loosen the
soil which helps to break it down.
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ARKive - Arabian sand boa
ARKive - Aardvark video
Earthworms
Science Starter: Tuesday, 9/17
 Species A is a predator species, and species B is a prey species.
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What would be the first thing to happen if all of species A were
removed from the ecosystem?
A. A predator species similar to species B will experience rapid
population growth.
B. There will be a time of rapid population growth of species B.
C. The amount of disease in species B will increase to limit the
population.
D. Other predator species will move into the ecosystem.
Is mechanical weathering the only type of
weathering?
 Absolutely Not!!!
 Chemical Weathering
 The break down of rocks into new substances by a
chemical reaction.
Water & Chemical Weathering
 Just as water is the most important factor in
mechanical weathering, it is also the most important
factor in chemical weathering.
 Water
 It can dissolve rock
 Acid rain can eat away rock
Earth: Acid Rain Eating Washington, D.C.
 Acid Rain
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