WELCOME TO SCIENCE 11/13

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WELCOME TO SCIENCE 11/13

• Come up to the cart and get a soil sample and a
  tray.
• Todays Schedule
• 1. Soil Samples
• 2. Ch. 10 Section 1 Notes/Discussion

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What makes up your soil?
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Science Starter Monday, 9/16

• Which of the following structures can be found in
  the plant cell but not in the animal cell.
• A. Vacuoles
• B. endoplasmic reticulum
• C. mitochondria
• D. cell wall

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This Weeks 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.

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Have these places always looked like they do in
these pictures?
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What has caused these places to change the way
they look?
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What process changes the way Earth looks the most?

• Weathering
• The breaking down of rock into small pieces.

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Mechanical Weathering

• Physically breaking rock into smaller pieces.
• How can this happen?
• Wind, Water, Ice, Gravity, and Organisms

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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

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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

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Can plants animals cause weathering?

• YES!!!
• Plants
• Roots can grow into a crack causing the crack to
  get bigger and bigger.

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Can plants animals cause weathering?

• Animals
• As animals burrow into the ground, they loosen
  the soil which helps to break it down.
• ARKive - Arabian sand boa
• ARKive - Aardvark video
• Earthworms

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Science Starter Tuesday, 9/17

• Species A is a predator species, and species B is
  a prey species. 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.

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Is mechanical weathering the only type of
weathering?

• Absolutely Not!!!
• Chemical Weathering
• The break down of rocks into new substances by a
  chemical reaction.

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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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