What is Life?
Life is the characteristic that distinguishes living things from non-living things. It includes the ability to grow, reproduce, respond to stimuli, and adapt to the environment. Living organisms are made up of cells, the basic unit of life.
Characteristics of Life
- Cellular Organization: All living things are composed of cells, which are the basic structural and functional units of life.
- Reproduction: Living organisms can produce offspring either sexually or asexually.
- Growth and Development: Living things grow and undergo changes in form and function over the course of their lives.
- Response to Stimuli: Living organisms can respond to internal and external stimuli in their environment.
- Homeostasis: Living organisms maintain a stable internal environment despite external changes.
- Adaptation: Living things can adapt to their environment through evolutionary changes over time.
- Metabolism: Living organisms utilize energy and chemical processes to sustain life.
Study Guide
- What are the basic units of life?
- How do living organisms reproduce?
- Explain the concept of homeostasis in living organisms.
- What are some examples of stimuli to which living organisms can respond?
- Describe the process of growth and development in living things.
- How do living organisms adapt to their environment?
- What is metabolism and why is it important for life?
[Life] Related Worksheets and Study Guides:
.◂Science Worksheets and Study Guides Third Grade. Science in our world - 3rd gr.
Study Guide
Science in our world - 3rd gr. 
Worksheet/Answer key
Science in our world - 3rd gr. Worksheet/Answer key
Science in our world - 3rd gr. Worksheet/Answer key
Science in our world - 3rd gr. Worksheet/Answer key
Documenting Data
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
History and Nature of Science: A student should understand the history and nature of science. A student who meets the content standard should:
Develop an understanding that historical perspectives of scientific explanations demonstrate that scientific knowledge changes over time, building on prior knowledge.
Develop an understanding that scientific knowledge is ongoing and subject to change as new evidence becomes available through experimental and/or observational confirmation(s).