Slide 1 / 101 Slide 2 / 101 4th Grade Earth Systems 2015-11-10 www.njctl.org Slide 3 / 101 Slide 4 / 101 Earth Systems Click on the topic to go to that section Earth's Systems Earth's Systems · Mechanical Weathering · Chemical Weathering · Erosion · Biogeology · Return to Table of Contents Slide 5 / 101 Slide 6 / 101 Earth's Systems Earth's Systems Earth has many parts that work together Earth has four systems that are continually working together. to make it the way that it is. Do you know the names of any of the systems represented in these pictures? Can you think of some parts of the Earth that work together?
Slide 7 / 101 Slide 8 / 101 Earth's Systems Earth's Systems - Atmosphere The four systems that work together are: The atmosphere is a layer of gases that surrounds Earth. The atmosphere includes the air around us. the atmosphere the biosphere the geosphere the hydrosphere Layers of gases within the atmosphere interact with each other. We can feel when these layers interact through a cool breeze or the thick air of a hot and humid day. Slide 9 / 101 Slide 9 (Answer) / 101 Earth's Systems - Biosphere Earth's Systems - Biosphere The biosphere is where life is found. The biosphere is where life is found. The biosphere includes: animals , plants , and all living organisms . The biosphere includes: animals , plants , and all living organisms . Answer The prefix "Bio" means life. [This object is a pull tab] What do you think the prefix " Bio " means? What do you think the prefix " Bio " means? Slide 10 / 101 Slide 10 (Answer) / 101 Earth's Systems: Geosphere Earth's Systems: Geosphere The geosphere is the solid, rock part of Earth. The geosphere is the solid, rock part of Earth. The geosphere includes: the interior of Earth (the mantle and The geosphere includes: the interior of Earth (the mantle and core), the crust, rocks, and all landforms that make up Earth. core), the crust, rocks, and all landforms that make up Earth. Answer The prefix "Geo" means earth. [This object is a pull tab] Can you guess what the prefix " Geo " means? Can you guess what the prefix " Geo " means?
Slide 11 / 101 Slide 11 (Answer) / 101 Earth's Systems - Hydrosphere Earth's Systems - Hydrosphere The hydrosphere is all of the water on Earth. The hydrosphere is all of the water on Earth. The hydrosphere includes: oceans , lakes , rivers , streams , The hydrosphere includes: oceans , lakes , rivers , streams , water in the air , snow , rain , and sleet . water in the air , snow , rain , and sleet . Answer The prefix "Hydro" means water. [This object is a pull tab] " Hydro " means ______________. " Hydro " means ______________. Slide 12 / 101 Slide 13 / 101 Earth's Systems Earth's Systems How is this fish tank like Earth's four systems? Right now, write a few complete sentences to answer this question. All of Earth's systems work together and interact with each other. Where do we see Earth's four systems here? (click the boxes to reveal the answers) atmosphere - sky biosphere - trees geosphere - cliff hydrosphere - lake Slide 14 / 101 Slide 15 / 101 Earth's Systems Earth's Systems What systems do we see here? What systems can we see here? atmosphere - sky biosphere - trees geosphere - rocks hydrosphere - river biosphere - sea turtle hydrosphere - ocean
Slide 16 / 101 Slide 16 (Answer) / 101 1 Earth has four systems that work together. 1 Earth has four systems that work together. True True Answer True False False [This object is a pull tab] Slide 17 / 101 Slide 17 (Answer) / 101 2 The ________ includes water in, on, and surrounding 2 The ________ includes water in, on, and surrounding the Earth. the Earth. A atmosphere A atmosphere Answer B biosphere B biosphere D C geosphere C geosphere D hydrosphere D hydrosphere [This object is a pull tab] Slide 18 / 101 Slide 18 (Answer) / 101 3 The solid, rock part of Earth is the_________. 3 The solid, rock part of Earth is the_________. A hydrosphere A hydrosphere Answer B atmosphere B atmosphere C C geosphere C geosphere D biosphere D biosphere [This object is a pull tab]
Slide 19 / 101 Slide 19 (Answer) / 101 4 The system that includes all life on Earth is the 4 The system that includes all life on Earth is the ________. ________. A biosphere A biosphere B geosphere B geosphere Answer A C hydrosphere C hydrosphere D atmosphere D atmosphere [This object is a pull tab] Slide 20 / 101 Slide 20 (Answer) / 101 5 The ________ is the layer of gases that surrounds 5 The ________ is the layer of gases that surrounds Earth. Earth. A geosphere A geosphere B hydrosphere B hydrosphere Answer C C atmosphere C atmosphere D biosphere D biosphere [This object is a pull tab] Slide 21 / 101 Slide 21 (Answer) / 101 6 Which of Earth's systems includes the crust? 6 Which of Earth's systems includes the crust? A hydrosphere A hydrosphere B biosphere B biosphere Answer D C atmosphere C atmosphere D geosphere D geosphere [This object is a pull tab]
Slide 22 / 101 Slide 22 (Answer) / 101 7 These are part of which system? 7 These are part of which system? A atmosphere A atmosphere B hydrosphere B hydrosphere C biosphere C biosphere Answer B D geosphere D geosphere (snow) (snow) [This object is a pull tab] (rain) (rain) Slide 23 / 101 Slide 23 (Answer) / 101 8 Is this squirrel part of the geosphere? 8 Is this squirrel part of the geosphere? Yes Yes No No Answer No [This object is a pull tab] Slide 24 / 101 Slide 25 / 101 Mechanical Weathering We know that sometimes Earth's systems work together to build up or create new rocks or crust - particularly the geosphere as tectonic plates interact . Mechanical Weathering the geosphere building up rocks in the form of a mountain range Return to Table But Earth's systems also work together to break down Earth's of Contents crust.
Slide 26 / 101 Slide 27 / 101 Mechanical Weathering Mechanical Weathering Weathering is the breaking down or dissolving of rocks, Mechanical weathering is one type of weathering. minerals, and sediments on Earth's surface. Weathering breaks down the land around us and shapes what we see on the surface. Mechanical weathering is when physical processes break down rock. For example, all of these small rocks were once part of the ledge above, but now physical forces have broken them off. Slide 28 / 101 Slide 29 / 101 Mechanical Weathering Mechanical Weathering An auto mechanic can help us remember what mechanical Like a mechanic who uses tools to take apart cars, weathering does. mechanical weathering is Earth's way of using different physical tools to break apart features on its surface . What does a mechanic do? An auto mechanic (click the box to find the answer) may use these tools: A mechanic uses tools to break a car into smaller pieces . You may know other things a mechanic does, but Mechanical weathering uses a different set of tools. remembering that a mechanic does this can help us remember what mechanical weathering is . Can you guess what they are? Slide 30 / 101 Slide 31 / 101 Mechanical Weathering Mechanical Weathering Some tools of mechanical weathering are: The tools of mechanical weathering are: (click boxes for answers) (click boxes for answers) water ice heat plants wind glaciers All of these work to break down the rocks of Earth's crust. plants wind glaciers All of these work to break down the rocks of Earth's crust.
Slide 32 / 101 Slide 33 / 101 Mechanical Weathering Mechanical Weathering - Water Some more tools of mechanical weathering are: Water is a strong force that breaks down rocks. (click boxes for answers) Here, waves have smashed against these rocks so many times that the rocks are now smoothed out and worn away. water ice the Sun All of these work to break down the rocks of Earth's crust. Slide 34 / 101 Slide 35 / 101 Mechanical Weathering - Ice Mechanical Weathering - Heat and Temperature Change When water freezes, it expands. Temperature, the change between hot and cold, is another When water gets into rocks and freezes, it expands inside the force of mechanical weathering. rock and causes the rock to crack. Click to watch a video demonstrating how ice can powerfully break apart rocks. Can you explain in your own words what happened in this video? This rock, which has many layers, is broken like a puzzle after many seasons of heating and freezing. Slide 36 / 101 Slide 37 / 101 Mechanical Weathering - Wind Mechanical Weathering - Plants Although wind can be hard to see with our eyes, its effects on Plants also can break apart rocks. rocks are not. Here, this tree has softer rock layers - grown into the rock very weathered by the wind and caused it to crack. harder rock layers - The roots of plants less weathered by the wind often break apart rocks. Here we can see how wind has weathered the softer layers this rock more than the harder layers.
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