3 Questions
Which of the following is a common element in the Earth's crust?
Oxygen
What is the process by which plants use sunlight to synthesize foods with the help of chlorophyll?
Photosynthesis
Which of the following is a primary function of the human respiratory system?
Gas exchange
Test your knowledge of Earth science with this quiz covering common elements in the Earth's crust, the process of photosynthesis in plants, and the primary functions of the human respiratory system.
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