DCA Week 24 Review 6 th Grade Feb 26, 2013. Minerals 6 Ways to Classify Minerals: 1.Hardness (How it breaks) 2.Luster 3.Density 4.Texture 5.Color 6.Streak.

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Presentation transcript:

DCA Week 24 Review 6 th Grade Feb 26, 2013

Minerals 6 Ways to Classify Minerals: 1.Hardness (How it breaks) 2.Luster 3.Density 4.Texture 5.Color 6.Streak Remember: Streak shows the true color of the mineral. Streaks are more reliable than color.

Rock Cycle: Classified by how they are formed Sedimentary Rock: pieces of sediment compacted and cemented together Metamorphic Rock: Heat and pressure Igneous Rock: Volcanic Activity (cooled and hardened)

Living Matter Remember in the beginning of the school year we talked about the elements that are in living matter: Oxygen & Hydrogen are 2 elements in living matter

Pulleys Pulleys are used mainly to help decrease the amount of force needed to pull up an object.

Speed average speed S= D T S= D ÷ T Example: – A truck driver drove 270 km in 3 hours. What is the trucks average speed? Answer: 90 km/h

Speed Find the average speed:

Distance Vs Time Car 4 has the LOWEST average speed and car 1 has the HIGHEST average speed. The steepness of a slope on graph shows how quick or slow an object is moving – Which car is moving the fastest? – Which car is moving the slowest? Remember when graphing Distance and time that Distance must be on the Y-axis while Time is on the X-axis

Linear Vs. Nonlinear Linear: straight line Nonlinear: not a straight line

Lets practice calculating average speed: 1.Mary ran 1760 yards in 2 hours. What was Mary’s average speed? 2.John rode his bike 6 km in 3 hours. What was John’s average speed? 3.A car travels up a hill at 90 km in 2 hours. What is the average speed?