Science Explorer 7th pages 226-231 TEKS 7.6 A Demonstrate basic relationships between force and motion using simple machines including pulleys and levers. TEKS 7.7 A Identify and demonstrate everyday examples of chemical phenomena such as rusting and tarnishing of metals and burning or wood. TEKS 7.14 A Describe and prdict the impact of different catastrophic events on the Earth B Analyze effects of regional erosional deposition and weathering; C Make inferences and draw conclusions about effects of human activity on Earth's renewable, non-renewable, and inexhaustible resources.
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