7-6 Solving Two-Step Inequalities – We learned that solving two-step inequalities is almost the same as solving two-step equations. The difference is when you multiply or divide each side of an inequality by a negative number you must also reverse the inequality simple.
Assignment: Complete problems from 7-6 in workbook
Lesson 3 Simple Circuits – We drew a circuit to show how electric particles flow. In the circuits we drew the electrons that make up an electric current in a wire which were supplied by a battery. We explored the difference between a closed circuit and an open circuit. Next, we looked at the difference between a conductor and an insulator.
Lesson 1 Slow Changes to Earth’s Landscape – We learned about weathering and erosion. Mechanical weathering occurs when water, wind, and other physical forces wear away rock. Temperature can change the water to ice inside the cracks of rocks causing them to split apart. Chemical weathering occurs when chemicals such as acid rain transform rock into new compounds. Mechanical weathering accelerates chemical weathering because it increases the surface area of the exposed rock.
Lesson 3 Simple Circuits – We explored the moving electric charges that make up an electric current. The charges move as a result of attractive and repulsive forces which transfer energy to the components of a complete circuit where it can be transformed into other types of energy.
Lesson 1 Slow Changes to Earth’s Landscape – We learned that rainfall helps to shape the land and affects the types of living things found in a region. Water, ice, wind, living organisms, and gravity break rocks, soils, and sediments into smaller particles and move them around.
Lesson 3 Simple Circuits – We learned how simple circuits function. Electric forces caused the movement of electrically charged particles in electric currents. We developed and used models to enhance our understanding of these processes.
Lesson 1 Slow Changes to Earth’s Landscape – We discovered the presence and location of fossils which indicate the order in which rock layers were formed. We looked at examples of sedimentary rock. We learned that weathering can be caused by blowing sand and moving water. Erosion is the movement of weathered material being carried away in pieces.
Lesson 2 Electric Forces – We discovered that forces that act at a distance can be explained by fields that extend through space and can be mapped by their effect on a test object such as a charged object or a ball. We developed and used models to enhance our understanding of electric fields and forces as well as their causes and effects.