Water and plastic do not mix well. This is especially true for tiny plastic bits called microplastics. These tiny plastics float around in our oceans and rivers. The way they move and settle depends on many things. Their shape, how round they are, and even how they interact with water. When these plastics age, they change. This change affects how they move through water. This is important because it helps figure out where they go and how long they stay in the water.

Think about a tiny plastic bit in the ocean. It is not smooth and round like a ball. It is more like a weird shape with rough edges. This shape makes it harder for water to push it around. The way water sticks to the plastic also changes. This is called wettability. When water likes the plastic more, the plastic sinks faster. This is because the water pulls it down. The opposite happens when water does not like the plastic. The plastic floats longer.

Scientists did some tests. They looked at how fast different plastics sink. They also looked at how water sticks to these plastics. They found that the more water likes the plastic, the faster it sinks. This is big news. It means that the way water and plastic interact is very important. It helps figure out where plastics end up in the water.

They also made a new way to predict how plastics move. This new way is better than old ones. It considers how water sticks to plastic. This makes it more accurate. They tested it with real data. It worked well. This is good news for figuring out where plastics go in the ocean. It helps find out where they pile up. This is important for understanding how they affect sea life.

This new way to predict plastic movement is a step forward. It helps us understand how plastics move in water. This is important for keeping our oceans clean. It also helps protect sea life from plastic harm. The more we know about how plastics move, the better we can protect our oceans.

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