grade 8 life science worksheets

📚 Topic Summary

Grade 8 life science explores the fascinating world of living organisms and their interactions. It covers fundamental concepts such as cell structure and function, genetics, evolution, ecosystems, and the human body. Understanding these concepts helps us appreciate the complexity and interconnectedness of life on Earth. This worksheet will test your knowledge of some key vocabulary and concepts.

🔬 Part A: Vocabulary

Match the terms with their correct definitions:

1. Cell
2. Ecosystem
3. Gene
4. Photosynthesis
5. Evolution

Definitions:

1. A unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
2. The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
3. A group of interacting organisms and their physical environment.
4. The smallest structural and functional unit of an organism.
5. The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.

📝 Part B: Fill in the Blanks

Complete the following paragraph using the words: Respiration, Nucleus, Ribosomes, Mitosis, Enzymes.

The process of cell division, called __________, is crucial for growth and repair. Within a cell, the __________ contains the genetic material. __________ are responsible for protein synthesis, while __________ are biological catalysts that speed up chemical reactions. Finally, __________ is the process by which organisms convert food into energy.

🤔 Part C: Critical Thinking

Explain how the concept of natural selection drives the process of evolution. Give a real-world example.