Thursday, April 10, 2014

Welcome to Unit 5: Earth's History

Use these links to review and study the topics we cover in science class.

1. A WHOLE WEBSITE dedicated to Earth's History, including videos.
2. An 8-minute overview of Earth's History, including vocabulary.
3. Pages 8 & 9 of the ESRT

More to come...

Monday, March 10, 2014

Unit 3: Dynamic Equilibrium: Other Organisms

March 3-March 7: How are organisms classified?  What makes an animal an animal?

Key ideas:
Visit THIS WEBSITE for more information about the topics below.
Organisms are living things. 
Scientists classify (organize) living things into categories based on their similarities.
Large categories of organisms are called Kingdoms. 
The most specific group of organisms is called a species.
A species is a group of similar organisms that can mate and reproduce AND their offspring can reproduce.  (In class we discussed lions and tigers being different species, even though they can produce offspring; their offspring CANNOT produce offspring.)

The Animal Kingdom is a group of organisms that:
-are made of many cells
-have cells that have a nucleus and other organelles (parts with specialized functions)
-have to eat their food (they can't make food in their cells)
-can move around to find shelter, escape predators, find food

March 10-March 15: Using physical characteristics to classify animals. Using a dichotomous key to identify organisms.

Tuesday, February 25, 2014

Human Body Unit Test: Study Links

Click on each of the links below to help you study for the Human Body Systems Unit Test.

1. Quiz on the functions of the systems:  CLICK HERE
(There are two systems on this quiz we didn't study: Immune System and Lymphatic System)

2.Quiz yourself on some details of some systems: CLICK HERE

3. Individual system quizzes.  Take them all!  Review answers you get wrong. CLICK HERE

4. Quick quiz

5. Magic School Bus Quiz

High level quiz: Lots of details we didn't study.  If you watch a lot of Discovery Channel give this a try.  (I'm looking at you, TR, AS, JA, and VW.)

Wednesday, December 18, 2013

Digestive System - Gross!
Click here to watch the video we viewed in class.
Here are the key points:
Mechanical digestion is the breakdown of food into smaller pieces by mashing, squeezing, chewing, etc.
Chemical digestion is the breakdown of food by chemical reactions
Mouth: mechanical digestion - chewing; chemical digestion - saliva is released by the salivary glands
Esophagus: no digestion, just a tube for the food to pass from your mouth to your stomach (takes about 5 seconds)
Stomach: mechanical digestion - churning and squeezing; chemical digestion: strong acid is released by the stomach wall;  the stomach's mucus lining protects the stomach from the acid
Small intestine: most of the nutrients from the food digested in the stomach are absorbed through the walls of the small intestine (absorption) and into the bloodstream where they travel to the cells of the body
Large intestine: water is removed from the undigested material (all the left-over stuff) and it becomes more solid
Liver: releases bile to help digestion
Pancreas: releases insulin to help digestion

Sunday, November 24, 2013

Welcome to Unit 2: Dynamic Equilibrium: The Human Body

Here are some videos and interactive sites about the Human Body:

1. Discovery Channel Video Site
2. Build a Body Interactive 
3. What is a cell?
4. Human Body Organs Game

Tuesday, November 19, 2013

Answers to the Geology Exam Review worksheet

Layers near the surface of the Earth (lithosphere, hydrosphere, biosphere, atmosphere)
What do the 4 prefixes mean? (litho-rock hydro-water bio-life atmos-air)
Rock cycle: how to read the rock cycle diagram
Describe two ways a sedimentary rock can form. an igneous rock weathers into sediment, erodes away, settles somewhere else, then is cemented and compacted into a sedimentary rock
Explain what turns an igneous rock into a metamorphic rock. heat and pressure
What are sediments? broken bits of rock that have been weathered
Formation of types of rocks (sedimentary, igneous, metamorphic)
Explain how each type of rock is formed. 
sedimentary: broken bits of rocks are pressed together and glued by minerals or other bits of rock
metamorphic: existing rocks are squeezed and heated, melting partially and morphing (changing) form
igneous: magma or lava cools, hardening into rock
What do sedimentary rocks contain that other types of rock do not? fossils
Properties of minerals: cleavage/fracture, luster, hardness, color, streak
Identify a mineral that has a green streak. pyrite
Identify a mineral that has cubic cleavage and tastes salty. halite
What properties would you need to observe to identify a mineral as calcite? bubbling with acid
Erosion – transportation of sediment after it is broken down by weathering
The forces that carry sediment (4 forces; 3 of them were demonstrated by sand in class) water, wind, glaciers, and gravity
Weathering (chemical and mechanical)
Explain how a pothole is formed.  A pothole is formed by ice wedging, which means that water seeps into a crack, then freezes and expands, wedging the rock apart.
Is the formation of a pothole mechanical or chemical weathering? physical
What is chemical weathering?  Chemical weathering is the breaking down of rocks where the composition of the rock is changed in the process.  This is different from physical weathering because physical weathering just makes rocks into smaller rocks.
Where fossils are found
In which type of rock are fossils mostly found?  Sedimentary
Relative ages of rocks
How does the age of fossils in the bottom layer of sedimentary rocks compare to the ages of fossils in the top layer?  The bottom layer is older than the top layer.
What the fossil record tells us
What can scientists infer by studying fossils of organisms that lived long ago? Scientists can infer what the characteristics of the climates and environments were.
Theory of Plate Tectonics
Alfred Wegener’s hypothesis:  The continents used to be connected and then have slowly moved apart to their current locations.
What fossils show about continental drift:  Fossils of some plants and animals can be found on more than one continent, showing that the continents used to be connected.
Convection Currents – movement that is created in a fluid when it is heated unevenly
Draw two convection currents in the mantle that are helping tectonic plates move.
Why one plate sinks under the other at a subduction zone
Draw a picture of one plate subducting under the other.
Label the plate that is more dense. The more dense plate is sinking under the continental plate.
Seafloor spreading
Who is Harry Hess?  What did he do to provide evidence for Wegener’s hypothesis?
Harry Hess used sonar to map the ocean floor.  He showed that there were ridges (mountains) and volcanoes on the seafloor, which provided evidence that new rock material was being created at the ridges, pushing the continents apart.
Measuring mass with a triple beam balance
Be able to measure mass to the nearest tenth of a gram.