Science · 1st Grade · Living Things and Their Habitats · Weeks 28-36

Needs of Living Things

Students identify the basic needs of plants and animals for survival (food, water, air, shelter).

• Common Core State Standards
• K-LS1-1

About This Topic

All living things share a set of basic requirements for survival, and first grade is when US students begin to formally articulate what those requirements are. Standard K-LS1-1 calls for students to use observations to describe patterns of what plants and animals need to survive. Food, water, air, and shelter are the four fundamental needs, though plants and animals meet those needs in different ways: plants make their own food through photosynthesis while animals must find or hunt for theirs, and the forms of shelter vary enormously by species and habitat.

This topic sets the foundation for all ecological thinking in later grades. When students understand that every organism has needs that must be met by its environment, they begin to see ecosystems as systems of supply and demand. It also opens conversations about what happens when needs are not met, a natural bridge to topics about habitat loss, conservation, and environmental stewardship.

Active learning approaches that involve real plants and animals are especially powerful here. Growing seeds in different conditions (with and without light, water, or soil), observing a class fish or lizard and charting its daily needs, or sorting picture cards of animals by habitat and food type all give students observational data to analyze rather than definitions to memorize.

Key Questions

1. Explain the essential needs for a plant to grow and thrive.
2. Compare the basic needs of different animals.
3. Predict what would happen to an animal if one of its basic needs was not met.

Learning Objectives

• Identify the four basic needs of plants and animals for survival: food, water, air, and shelter.
• Compare how different plants and animals obtain their essential needs from their environment.
• Explain what might happen to a plant or animal if one of its basic needs is not met.
• Classify living things based on how they meet their need for food.

Before You Start

Characteristics of Living Things

Why: Students need to be able to distinguish between living and non-living things before identifying the needs of living things.

Basic Observation Skills

Why: This topic relies on students observing plants and animals to identify patterns in their needs.

Key Vocabulary

Needs	Things that all living things require to survive and grow, such as food, water, air, and shelter.
Shelter	A place that provides protection and safety from weather and predators for plants and animals.
Photosynthesis	The process plants use to make their own food using sunlight, water, and air.
Habitat	The natural home or environment where a plant or animal lives, providing the things it needs to survive.

Watch Out for These Misconceptions

Common Misconception

Plants do not need food because they are not animals.

What to Teach Instead

Students often believe only animals eat food. Clarifying that plants make their own food from sunlight and water (without yet teaching photosynthesis formally) and that this food powers their growth corrects the idea that plants are passive. Comparing a plant in full sun to one kept in a dark box over a week provides direct evidence.

Common Misconception

Shelter means a house or a nest.

What to Teach Instead

The common meaning of shelter narrows students' thinking. Expanding the concept to include a log where a beetle hides, the underside of a leaf where an aphid lives, or the desert sand a lizard burrows into helps students see shelter as any protection from the environment. Picture card sorting activities are ideal for broadening this definition.

Active Learning Ideas

Progettazione (Reggio Investigation): What Does a Plant Need?

Set up four bean seedlings in different conditions: one with full needs met, one without light (covered box), one without water, and one without soil (roots suspended in air). Students observe all four over one week, sketch changes daily, and present their findings on a simple class chart showing which plant thrived and why.

15 min·Small Groups

Sorting Activity: Animals and Their Needs

Give each group a set of animal picture cards and three sorting mats labeled 'Food', 'Water', and 'Shelter'. Students sort images showing each animal meeting each need, then discuss: do all animals need all three? The class compares sorts and identifies one animal whose way of meeting each need is surprising or unique.

25 min·Small Groups

Think-Pair-Share: What Would Happen?

Present three scenarios one at a time: a pond dries up, a forest is cleared, a field has no insects. For each, students predict which animals or plants are affected and why. Pairs share their reasoning before the class builds a web of connections showing how the absence of one resource affects many organisms.

20 min·Pairs

Real-World Connections

• Zookeepers at the National Zoo are responsible for ensuring that animals receive the correct types and amounts of food, clean water, and appropriate living spaces that mimic their natural habitats.
• Botanists at agricultural research stations study what plants need to grow, experimenting with different amounts of water, light, and soil nutrients to develop better crop yields for farmers.
• Wildlife biologists study animal populations to understand their needs for food, water, and shelter in different environments, helping to protect endangered species by preserving their habitats.

Assessment Ideas

Quick Check

Provide students with picture cards of various plants and animals. Ask them to sort the cards into groups based on one need they share (e.g., animals that need trees for shelter, plants that need sunlight). Discuss their groupings as a class.

Exit Ticket

On a half-sheet of paper, ask students to draw one plant or animal and label the four basic needs it requires to survive. Then, ask them to write one sentence explaining what would happen if one of those needs was not met.

Discussion Prompt

Pose the question: 'Imagine a bird loses its nest. What are the immediate problems it might face because it lost its shelter?' Guide students to connect the loss of shelter to other needs, like protection from weather or predators.

Frequently Asked Questions

What are the four basic needs of living things for first grade?

The four basic needs are food, water, air, and shelter. Plants and animals both need water and air, but they differ in how they get food: plants make it from sunlight and water while animals eat plants or other animals. Shelter means any place that provides protection from the environment, which varies widely between species.

How do plants and animals' basic needs differ?

Animals must find food from outside sources, either plants or other animals, while plants produce their own food using sunlight and water. Both need water and air, but animals often require specific temperatures and shelters that plants do not. These differences are the starting point for understanding why different organisms live in different habitats.

How can first grade teachers use real plants to teach basic needs?

Growing bean seeds under different conditions is the most effective approach. Four cups with different variables, one control and three missing one need each, show students within one to two weeks exactly what happens when a need is not met. The comparison is immediate, visual, and student-generated, which makes it memorable.

How does active learning strengthen first graders' understanding of what living things need to survive?

When students grow plants under different conditions or sort animal behaviors by need, they generate their own evidence rather than memorizing a list. This inquiry-based approach builds the habit of observation and pattern recognition that underlies all of science, while the hands-on connection to real organisms makes the concepts personally meaningful.