In one to two sentences, explain a similarity and a difference between the particles in liquid water at 100ºC and the particles in steam at 100ºC. As a 9th grader

Answer 1

Both liquid water at 100ºC and steam at 100ºC consist of water molecules made up of two hydrogen atoms and one oxygen atom. However, the particles in liquid water are closely packed and interact with each other more strongly, while the particles in steam are further apart and move more freely, as they have more energy and are in a gaseous state.

Answer 2

You overhear a friend saying, “Plastic is the worst thing that humans have ever invented.”

In four to five sentences, explain why you agree with your friend’s statement. Be sure to include facts that show the range of impacts that plastic has on human society and the environment.

Answer 3

I agree with my friend that plastic is one of the worst inventions due to its devastating impact on the environment and human health. Plastics can take hundreds of years to decompose, leading to massive amounts of waste in landfills and oceans, where they harm wildlife and disrupt ecosystems. Moreover, microplastics, tiny plastic particles that result from the breakdown of larger items, have been found in our food and drinking water, posing potential health risks to humans. Additionally, plastic production often involves harmful chemicals and contributes significantly to greenhouse gas emissions, exacerbating climate change. Overall, while plastics have practical uses, their long-term consequences overshadow their benefits, making them a major environmental and societal issue.

Answer 4

As an 8th grader

Answer 5

I agree with my friend that plastic is one of the worst things humans have invented. It takes a very long time to break down, which means plastic waste piles up in landfills and oceans, harming animals and their habitats. We also find tiny bits of plastic, called microplastics, in our food and water, which could be bad for our health. Plus, making plastic can release harmful chemicals and contribute to pollution and climate change. Overall, while plastic is useful, its negative effects on the environment and our health are really concerning.