Examlex
Calcium hydroxide is slightly soluble in water. About 1 gram will dissolve in 1 liter. What are the spectator ions in the reaction of such a dilute solution of calcium hydroxide with hydrochloric acid?
Flake Tools
Prehistoric stone tools created by chipping or flaking off pieces from a larger stone, used by early humans for cutting and scraping.
Homo Erectus
An extinct species of early human that lived throughout Africa, Asia, and Europe between approximately 1.9 million and 143,000 years ago, known for its upright posture.
Toolmakers
Beings (often humans) who create, modify, or use tools, enhancing their ability to interact with and manipulate their environment.
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