Environmental Science: Plastic Pollution and Microplastics Worksheet

Question 1

Define plastic pollution in your own words. Include one example of plastic pollution you might see in a neighborhood, park, river, or ocean.

Accepted Answer

Plastic pollution is the buildup of plastic waste in the environment where it can harm living things and ecosystems. One example is a plastic bottle floating in a river or a plastic bag caught in a tree.

Question 2

Microplastics are usually defined as plastic pieces smaller than 5 millimeters. Name two ways microplastics can form.

Accepted Answer

Microplastics can form when larger plastic items break into smaller pieces because of sunlight, waves, or weathering. They can also come from tiny plastic beads, synthetic clothing fibers, or tire dust.

Question 3

A student finds plastic pieces on a beach and sorts them into two groups: macroplastics larger than 5 millimeters and microplastics smaller than 5 millimeters. If the student finds 42 macroplastic pieces and 138 microplastic pieces, how many total plastic pieces were found?

Accepted Answer

The student found 180 total plastic pieces because 42 plus 138 equals 180.

Question 4

Explain why microplastics can be difficult to clean up once they enter lakes, rivers, or oceans.

Accepted Answer

Microplastics are difficult to clean up because they are very small, spread out over large areas, and can mix with sand, mud, and water. Some pieces may also sink or be eaten by organisms, making them even harder to remove.

Question 5

Look at a simple food chain: plankton are eaten by small fish, small fish are eaten by larger fish, and larger fish are eaten by seabirds. Describe how microplastics could move through this food chain.

Accepted Answer

Microplastics could be eaten by plankton or small fish. Then the plastic particles may move into larger fish when they eat the smaller organisms, and seabirds could be exposed when they eat the larger fish.

Question 6

A school cafeteria uses 250 single-use plastic forks each day. If the school switches to reusable forks for 5 school days, how many single-use plastic forks could be avoided?

Accepted Answer

The school could avoid using 1,250 single-use plastic forks because 250 forks per day multiplied by 5 days equals 1,250 forks.

Question 7

List three possible sources of microplastics in a city or town.

Accepted Answer

Three possible sources of microplastics are fibers from synthetic clothing in laundry water, tire dust from roads, and plastic litter that breaks into smaller pieces. Other examples include paint flakes, artificial turf, and plastic packaging fragments.

Question 8

A bar graph shows the following plastic waste collected during a park cleanup: bottles, 35 items; bags, 22 items; food wrappers, 48 items; straws, 15 items. Which category was collected the most, and which was collected the least?

Accepted Answer

Food wrappers were collected the most, with 48 items. Straws were collected the least, with 15 items.

Question 9

Explain one way plastic pollution can harm animals even before it breaks into microplastics.

Accepted Answer

Plastic pollution can harm animals when they mistake plastic for food and eat it. It can also trap or entangle animals, making it hard for them to move, breathe, or find food.

Question 10

Some plastics float, while others sink. Explain why this matters when scientists study plastic pollution in the ocean.

Accepted Answer

This matters because floating plastics can travel long distances on surface currents, while sinking plastics can collect on the seafloor or affect bottom-dwelling organisms. Scientists need to sample different parts of the ocean to understand the full problem.

Question 11

Choose one action from the list and explain how it can reduce plastic pollution: using a refillable water bottle, bringing reusable bags, repairing items, buying products with less packaging, or joining a cleanup.

Accepted Answer

Using a refillable water bottle can reduce plastic pollution because it lowers the number of single-use plastic bottles that are bought and thrown away. Over time, this can prevent many bottles from entering landfills, rivers, or oceans.

Question 12

A company says its new plastic package is biodegradable. What is one scientific question you should ask before deciding whether this package is better for the environment?

Accepted Answer

One scientific question is: Under what conditions does the package biodegrade, and how long does it take? This matters because some materials only break down in special industrial composting facilities and may not break down quickly in nature.

Environmental Science: Plastic Pollution and Microplastics

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