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"Will Rocks Change Their Appearance" Earth's Surface and Its Changes PPT Courseware 3
teaching objectives
1. Name and explain the main causes of rock weathering;
2. Experiments to explore the causes of rock weathering;
3. How does weathering change the topography?
4. Appreciate the landscape formed by the changes in natural rocks and gain a sense of beauty.
Do rocks change their appearance?
Have we seen rocks in the mountains?
At the foot of the mountain, we can often see what kind of traces on the rocks, and why?
What kind of rocks and stones do you see on rivers and beaches in mountainous areas? Why?
Plants grow from rock cracks, animals move on rocks and make nests in recesses. What does it mean to rocks?
Explore why rocks change
Discussion: What force causes a seemingly solid rock to change?
1. The effects of cold and heat
2. The function of running water
3. The role of plants
4. Animal activities
scientific concept
Due to the action of water, atmosphere, temperature, or animals and plants, rocks are broken. This phenomenon is called weathering.
Can we now explain why the rocks are covered with cracks, the gravel and sand at the foot of the mountain and on the creek beach?
Weathering changes the topography
Tell me what you know about the beautiful landscape of our hometown
Do you know the reason?
Scientific concepts:
Weathering changes the topography of the Earth, but this change occurs slowly.
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"Will Rocks Change Their Appearance" PPT download of Earth's surface and its changes:
"Will Rocks Change Their Appearance?" The Earth's Surface and Its Changes PPT Download Part One Content: Exploration Activity 1. The Effects of Cold and Heat Experimental Materials Alcohol lamp, tweezers, sink, stones Experimental Purpose Explore the effects of cold and heat on rocks Experimental steps 1. Use tweezers to clamp...
"Will Rocks Change Their Appearance" Earth's Surface and Its Changes PPT:
"Will Rocks Change Their Appearance" PPT on the Earth's Surface and Its Changes Part One: Exploring the Causes of Rock Changes What forces cause rocks to change when they look very hard? Let's explore this question experimentally. The effects of cold and heat will...
"Will rocks change their appearance?" Earth's surface and its changes PPT courseware 4:
"Do rocks change their appearance?" Earth's surface and its changes PPT courseware 4 1. Exploring the reasons for rock changes 1. The role of cold and heat In nature, due to the temperature difference between day, night and season, rocks expand and contract with heat. Experimental materials: small rocks, alcohol...