As the substance melts the particles have a higher chance of colliding with one another and also move much faster than when the substance is solid. This is because the particles have a higher surface area to move around. Also the arrangements of particles are free.
I don’t think this has all of the info to answer this question
The people of Sumer are among the earliest denizens of Mesopotamia. By about 4000 BCE, the Sumerians had organized themselves into several city-states that were spread throughout the southern part of the region. These city-states were independent of one another and were fully self-reliant centers, each surrounding a temple that was dedicated to god or goddess specific to that city-state. Each city-state was governed by a Priest King.
Living in a way that allows people to meet present needs, without compromising the ability of future generations to do the same, is known as sustainability.
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What is sustainability ?</h3>
Sustainability is a social ideal that, in general, seeks for long-term human coexistence on Earth in safety. Since there is no universally accepted definition of sustainability, there are many different ones in the literature and over time. Meeting our needs today without sacrificing the potential of future generations to do the same is what is meant by sustainability. Along with natural resources, we also require economic and social resources. Sustainability goes beyond environmental concerns.
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What makes a lifestyle sustainable?</h3>
Living sustainably is a practical attitude that attempts to lessen societal and individual environmental impact by implementing actions to combat climate change and other serious environmental issues. Living sustainably is, to put it another way, a way of lessening one's "carbon footprint".
To know more about carbon footprint visit :
brainly.com/question/1270740
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