Science Worksheets and Study Guides Eighth Grade. Chemical reactions

The resources above correspond to the standards listed below:

Washington DC Standards

DC.8.3. Reactions: Broad Concept: Chemical reactions are processes in which atoms are rearranged into different combinations of molecules. As a basis for understanding this concept, students:
8.3.1. Discover and explain how elements and compounds (reactants) react with each other to form products with different properties.
8.3.3. Explain how the idea of atoms, as proposed by John Dalton, explains the conservation of matter: In chemical reactions, the number of atoms stays the same no matter how they are arranged, and the mass of atoms does not change significantly in chemical reactions, so their total mass stays the same.
8.3.4. Investigate how and explain that during endothermic chemical reactions heat energy is absorbed from the surroundings and in exothermic reactions heat energy is released to the surroundings.
8.3.5. Investigate and explain that reactions occur at different rates, slow to fast, and that reaction rates can be changed by changing the concentration of reactants, the temperature, the surface areas of solids and by using a catalyst.
DC.CC.6-8.RST. Reading Standards for Literacy in Science and Technical Subjects
Craft and Structure
6-8.RST.4. Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 6-8 texts and topics.

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