4th Grade Earth Systems 2015-11-10 www.njctl.org Slide 3 / 101 - PDF document

Slide 1 / 101 Slide 2 / 101 4th Grade Earth Systems 2015-11-10 www.njctl.org Slide 3 / 101 Earth Systems Click on the topic to go to that section Earth's Systems · Mechanical Weathering · Chemical Weathering · Erosion · Biogeology ·

Slide 4 / 101 Earth's Systems Return to Table of Contents Slide 5 / 101 Earth's Systems Earth has many parts that work together to make it the way that it is. Can you think of some parts of the Earth that work together? Slide 6 / 101 Earth's Systems Earth has four systems that are continually working together. Do you know the names of any of the systems represented in these pictures?

Slide 7 / 101 Earth's Systems The four systems that work together are: the atmosphere the biosphere the geosphere the hydrosphere Slide 8 / 101 Earth's Systems - Atmosphere The atmosphere is a layer of gases that surrounds Earth. The atmosphere includes the air around us. 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 Earth's Systems - Biosphere The biosphere is where life is found. The biosphere includes: animals , plants , and all living organisms . What do you think the prefix " Bio " means?

Slide 9 (Answer) / 101 Earth's Systems - Biosphere The biosphere is where life is found. 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? Slide 10 / 101 Earth's Systems: Geosphere The geosphere is the solid, rock part of Earth. The geosphere includes: the interior of Earth (the mantle and core), the crust, rocks, and all landforms that make up Earth. Can you guess what the prefix " Geo " means? Slide 10 (Answer) / 101 Earth's Systems: Geosphere The geosphere is the solid, rock part of Earth. The geosphere includes: the interior of Earth (the mantle and 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?

Slide 11 / 101 Earth's Systems - Hydrosphere The hydrosphere is all of the water on Earth. The hydrosphere includes: oceans , lakes , rivers , streams , water in the air , snow , rain , and sleet . " Hydro " means ______________. Slide 11 (Answer) / 101 Earth's Systems - Hydrosphere The hydrosphere is all of the water on Earth. The hydrosphere includes: oceans , lakes , rivers , streams , water in the air , snow , rain , and sleet . Answer The prefix "Hydro" means water. [This object is a pull tab] " Hydro " means ______________. Slide 12 / 101 Earth's Systems How is this fish tank like Earth's four systems? Right now, write a few complete sentences to answer this question.

Slide 13 / 101 Earth's Systems 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 Earth's Systems What systems do we see here? atmosphere - sky biosphere - trees geosphere - rocks hydrosphere - river Slide 15 / 101 Earth's Systems What systems can we see here? biosphere - sea turtle hydrosphere - ocean

Slide 16 / 101 1 Earth has four systems that work together. True False Slide 16 (Answer) / 101 1 Earth has four systems that work together. True Answer True False [This object is a pull tab] Slide 17 / 101 2 The ________ includes water in, on, and surrounding the Earth. A atmosphere B biosphere C geosphere D hydrosphere

Slide 17 (Answer) / 101 2 The ________ includes water in, on, and surrounding the Earth. A atmosphere Answer B biosphere D C geosphere D hydrosphere [This object is a pull tab] Slide 18 / 101 3 The solid, rock part of Earth is the_________. A hydrosphere B atmosphere C geosphere D biosphere Slide 18 (Answer) / 101 3 The solid, rock part of Earth is the_________. A hydrosphere Answer B atmosphere C C geosphere D biosphere [This object is a pull tab]

Slide 19 / 101 4 The system that includes all life on Earth is the ________. A biosphere B geosphere C hydrosphere D atmosphere Slide 19 (Answer) / 101 4 The system that includes all life on Earth is the ________. A biosphere B geosphere Answer A C hydrosphere D atmosphere [This object is a pull tab] Slide 20 / 101 5 The ________ is the layer of gases that surrounds Earth. A geosphere B hydrosphere C atmosphere D biosphere

Slide 20 (Answer) / 101 5 The ________ is the layer of gases that surrounds Earth. A geosphere B hydrosphere Answer C C atmosphere D biosphere [This object is a pull tab] Slide 21 / 101 6 Which of Earth's systems includes the crust? A hydrosphere B biosphere C atmosphere D geosphere Slide 21 (Answer) / 101 6 Which of Earth's systems includes the crust? A hydrosphere B biosphere Answer D C atmosphere D geosphere [This object is a pull tab]

Slide 22 / 101 7 These are part of which system? A atmosphere B hydrosphere C biosphere D geosphere (snow) (rain) Slide 22 (Answer) / 101 7 These are part of which system? A atmosphere B hydrosphere C biosphere Answer B D geosphere (snow) [This object is a pull tab] (rain) Slide 23 / 101 8 Is this squirrel part of the geosphere? Yes No

Slide 23 (Answer) / 101 8 Is this squirrel part of the geosphere? Yes No Answer No [This object is a pull tab] Slide 24 / 101 Mechanical Weathering Return to Table of Contents 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 . the geosphere building up rocks in the form of a mountain range But Earth's systems also work together to break down Earth's crust.

Slide 26 / 101 Mechanical Weathering Weathering is the breaking down or dissolving of rocks, minerals, and sediments on Earth's surface. Weathering breaks down the land around us and shapes what we see on the surface. Slide 27 / 101 Mechanical Weathering Mechanical weathering is one type of weathering. 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 Mechanical Weathering An auto mechanic can help us remember what mechanical weathering does. What does a mechanic do? (click the box to find the answer) A mechanic uses tools to break a car into smaller pieces . You may know other things a mechanic does, but remembering that a mechanic does this can help us remember what mechanical weathering is .

Slide 29 / 101 Mechanical Weathering Like a mechanic who uses tools to take apart cars, mechanical weathering is Earth's way of using different physical tools to break apart features on its surface . An auto mechanic may use these tools: Mechanical weathering uses a different set of tools. Can you guess what they are? Slide 30 / 101 Mechanical Weathering The tools of mechanical weathering are: (click boxes for answers) water ice heat plants wind glaciers All of these work to break down the rocks of Earth's crust. Slide 31 / 101 Mechanical Weathering Some tools of mechanical weathering are: (click boxes for answers) plants wind glaciers All of these work to break down the rocks of Earth's crust.

Slide 32 / 101 Mechanical Weathering Some more tools of mechanical weathering are: (click boxes for answers) water ice the Sun All of these work to break down the rocks of Earth's crust. Slide 33 / 101 Mechanical Weathering - Water Water is a strong force that breaks down rocks. Here, waves have smashed against these rocks so many times that the rocks are now smoothed out and worn away. Slide 34 / 101 Mechanical Weathering - Ice When water freezes, it expands. When water gets into rocks and freezes, it expands inside the 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?

Slide 35 / 101 Mechanical Weathering - Heat and Temperature Change Temperature, the change between hot and cold, is another force of mechanical weathering. This rock, which has many layers, is broken like a puzzle after many seasons of heating and freezing. Slide 36 / 101 Mechanical Weathering - Plants Plants also can break apart rocks. Here, this tree has grown into the rock and caused it to crack. The roots of plants often break apart rocks. Slide 37 / 101 Mechanical Weathering - Wind Although wind can be hard to see with our eyes, its effects on rocks are not. softer rock layers - very weathered by the wind harder rock layers - less weathered by the wind Here we can see how wind has weathered the softer layers this rock more than the harder layers.