An Environment Provides for an Organism's Needs
An environment provides for an organism's needs is a Grade 3 science concept that identifies the essential resources every living thing requires and explains how environments supply them. All organisms need food (energy), water, air (for most), and appropriate temperature conditions. Plants get energy from sunlight, water from soil, and carbon dioxide from air—all provided by their environment. Deer get energy from plants, water from streams, air to breathe, and shelter from trees—all environmental resources. When an environment cannot provide these needs, organisms must move, adapt, or face population decline.
Key Concepts
Every living thing, or organism , lives in a place called its environment . An environment includes all the living and nonliving things in one area, such as the soil, water, and other plants and animals.
To stay alive, an organism must get what it needs from its environment. For example, an earthworm needs damp soil to keep its skin wet, and a polar bear needs a cold, icy place to hunt for its food.
Common Questions
What needs do all living organisms have?
All living organisms need food or energy, water, air (oxygen for animals, carbon dioxide for plants), and an appropriate temperature range. Most also need space and shelter.
How does an environment provide food for animals?
The environment contains prey animals, plants, fungi, and other organisms that serve as food. A forest provides deer with grasses, shrubs, and tree leaves; a river provides fish with insects, smaller fish, and aquatic plants.
What happens when an environment can no longer meet an organism's needs?
Organisms may migrate to a better environment, reduce population size due to starvation or dehydration, or—if unable to move or adapt—the local population may die out.
How do plants get what they need from their environment?
Plants absorb water and minerals through roots (from soil), take in carbon dioxide through leaf pores (from air), and capture energy from sunlight (from the sun). All needs are met from environmental resources.
Why can't all organisms live in all environments?
Each environment provides specific resources at specific levels. A polar bear's needs (extreme cold, marine prey) cannot be met in a tropical rainforest. Every organism is adapted to the specific environment that meets its particular needs.