1. Density of Earth Write the stuff in red

2. Sid gathered some stuff from a stream, in a bucket. He separated out the particles and measured each pile. (Copy down this chart) SubstanceMassVolumeDensity Pebbles 84.7 g31.5 ml Clay Silt 21.0 g13.13 cc Wood Chips 62.1 g68.2 cm 3 Sand 49.7 g25.89 ml Water 61.1 g60.9 ml Air 1.2 g1200 ml Large rocks 85.9 g32.3 cc

3. Sid forgot his calculator. Make the density calculations for him. (round your answer to the accuracy of the given numbers) SubstanceMassVolumeDensity Pebbles 84.7 g31.5 ml Clay Silt 21.0 g13.13 cc Wood Chips 62.1 g68.2 cm 3 Sand 49.7 g25.89 ml Water 61.1 g60.9 ml Air 1.2 g1200 ml Lg rocks 85.9 g32.3 cc

4. 1 point for each correct answer. 3 points for creating the chart. SubstanceMassVolumeDensity Pebbles 84.7 g31.5 ml2.7 g/ml Clay Silt 21.0 g13.13 cc1.60 g/cc Wood Chips 62.1 g68.2 cm 3 0.91 g/cm3 Sand 49.7 g25.89 ml1.92 g/ml Water 61.1 g60.9 ml1.0 g/ml Air 1.2 g1200 ml0.001 g/ml Lg rocks 85.9 g32.3 cc2.7 g/cc

5. Sid then mixed all of the stuff back together and put it in a glass jar.  Make a prediction.  Draw what you think Sid’s jar will look like if he doesn’t touch it for 10 minutes.

6. Evidence:  Play with the tubes for a minute. Gather evidence…  Which particles settle to the bottom first?  Which particles are always on top?  What is at the very top of the tube?  Draw the evidence in your notebook on the left side.

7. Evidence:  Now, write the densities next to each layer.  Draw the evidence in your notebook.

8. Inference:  How does your drawing of the tube compare to your drawing of Sid’s river stuff?  What inference can you make about density? Make an inference on the right side.

9. Evidence: Examine the particle sizes of sand, silt, and pebbles. Label your jar as biggest, medium, smallest

10. Inference:  What inference can you make about particle size?  Which would fall to the bottom first, large rocks or small pebbles? (Assuming that they were the same density.) Make an inference on the right side.

11. Big Idea #1Big Idea #1  Particles sort according to density – most dense at the bottom.

12. Big Idea #2Big Idea #2  Particles sort according to particle size – biggest at the bottom.

13. How does this apply to the whole earth?How does this apply to the whole earth?