Science · Kindergarten · Living Things and Their Environments · Weeks 10-18

Humans and the Earth: Our Impact

Students understand how humans can impact the environment through their actions.

• Common Core State Standards
• K-ESS3-3

About This Topic

This topic asks Kindergartners to connect their everyday actions to the world around them. Students discover that human choices such as leaving trash on the ground, cutting trees, or using too much water change the environment in ways that affect plants and animals. Aligned with K-ESS3-3, this unit focuses on understanding impact before moving on to solutions in the next topic.

Keeping the scope local and age-appropriate is essential here. Rather than presenting global environmental problems, this topic works best when it stays close to what students know: the schoolyard, the neighborhood park, a nearby stream. When students see that litter in the school garden harms the earthworms or birds that live there, the human-impact concept becomes personal and real rather than distant and overwhelming.

Active learning is particularly valuable in this topic because environmental impact is often invisible in everyday life. Students who observe clean water compared to a container where soil and litter were added get a direct view of how human actions change a natural resource. That before-and-after comparison, done with hands on materials, produces genuine curiosity that makes the solution-focused follow-up lesson more meaningful and more urgent.

Key Questions

1. Analyze how our choices change the world around us.
2. Explain how littering harms animals and plants.
3. Predict what happens to a forest when many trees are cut down.

Learning Objectives

• Identify at least three ways human actions can change the local environment.
• Explain how littering can harm plants and animals in a specific local habitat.
• Compare a clean environment with one that has been impacted by litter or pollution.
• Predict the effect of removing many trees from a local forest area.

Before You Start

Basic Needs of Living Things

Why: Students need to understand that plants and animals need clean air, water, and food to survive before they can understand how human actions impact these needs.

Parts of a Plant

Why: Understanding what plants need to grow helps students grasp how litter or pollution can prevent them from thriving.

Key Vocabulary

litter	Trash or garbage that is left in a place where it does not belong, like on the ground or in a stream.
environment	The natural world around us, including the air, water, land, plants, and animals.
impact	A strong effect or influence that one thing has on another, like how our actions affect the environment.
habitat	The natural home or place where a plant or animal lives, like a forest for squirrels or a pond for frogs.

Watch Out for These Misconceptions

Common Misconception

The Earth is so big that one person's trash does not matter.

What to Teach Instead

Students often feel their actions are too small to count. Demonstrate by having each student drop one paper on the floor until the room is noticeably messy, then pick up together until it is clear. That collective action, scaled to the classroom, makes individual impact visible without requiring abstract thinking about large numbers.

Common Misconception

Animals and plants can always move somewhere else if their home is damaged.

What to Teach Instead

Students assume wildlife has the same freedom humans do to relocate. Discussing specific animals that depend on one habitat type, such as koalas requiring eucalyptus trees, helps students understand that many living things cannot simply find a new home. The animal reporter role play surfaces this naturally when students speak from the perspective of an animal tied to one specific place.

Active Learning Ideas

Inquiry Circle: Before and After Water

Give small groups two jars of water. One jar stays clean; into the other, students add a pinch of dirt, a drop of food coloring as a stand-in for dye or soap, and a small scrap of paper. Students observe both jars, describe the difference, and discuss what changed the water and whether they would want to drink either one.

20 min·Small Groups

Gallery Walk: Impact Evidence

Post six large photos showing human impact: litter on a beach, a clear-cut hillside, a clean park, a thriving garden, a storm drain blocked with trash, and a healthy stream. Students walk with sticky dots and place a green dot on photos where humans helped the environment and a red dot where humans caused harm.

20 min·Pairs

Think-Pair-Share: What Changed Here?

Show two side-by-side aerial photos: a healthy forest and the same area after logging. Students share with a partner what they notice is missing and which animals or plants might be affected by that change. The class shares out and lists the losses together on a chart.

15 min·Pairs

Role Play: The Animal Reporter

Students choose an animal and briefly describe, from that animal's perspective, what happened to their home when people left trash or cut down trees. Sentence frames guide students: 'My name is ___. I live in ___. When people ___, my home ___.' Each student shares one or two sentences.

20 min·Individual

Real-World Connections

• Park rangers at local parks often organize community clean-up days to remove litter that visitors have left behind, helping to protect the plants and animals that live there.
• City workers or volunteers might plant new trees in neighborhoods after a storm has knocked down old ones, helping to restore the environment and provide shade and homes for birds.

Assessment Ideas

Exit Ticket

Give each student a drawing of a park. Ask them to draw one way a person could help the park and one way a person could hurt the park. They should also draw one animal that lives in the park.

Discussion Prompt

Show students two pictures: one of a clean stream and one of a stream with trash in it. Ask: 'What is different between these two pictures? Which stream would be better for the fish and the plants? Why?'

Quick Check

Hold up pictures of different actions (e.g., planting a flower, throwing trash on the ground, watering a plant, cutting down a tree). Ask students to give a thumbs up if the action helps the environment and a thumbs down if it harms the environment. Ask them to explain why for one or two examples.

Frequently Asked Questions

How do I teach about environmental impact without making 5-year-olds feel guilty or anxious?

Focus on knowledge before judgment. The goal at this stage is for students to understand the connection between actions and outcomes, not to assign blame or feel overwhelmed. Use a tone of curiosity rather than alarm, and frame the class as investigators figuring out how things are connected. The solutions topic that follows gives students immediate ways to act, which is the best antidote to worry.

What local examples of human impact can I use that are appropriate for Kindergarten?

Litter in the schoolyard, water running while brushing teeth, pulling leaves off plants, and plastic bags in storm drains are all relatable examples. Connecting impact to a student's daily experience makes the concept immediate. A brief walk around the school to observe and photograph examples works well as a class investigation and generates authentic student curiosity.

How does K-ESS3-3 connect to engineering design?

K-ESS3-3 asks students to communicate solutions that reduce human impact. Understanding the impact first is necessary before solutions can be meaningful. This topic provides the problem; the next topic provides the solution. Together they form a complete design thinking sequence where students identify the issue before proposing fixes, which is the structure K-ETS1 is built around.

How does hands-on investigation help students understand environmental impact?

When students add contaminants to clean water and watch the change happen in real time, they are experiencing cause and effect directly. That active observation is more convincing than a photograph because students did it themselves. The experience stays personal, which is exactly what drives genuine understanding at this age and carries over into the solutions-focused lesson.