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# Today in Science - PowerPoint PPT Presentation

Today in Science. You will Need: Pencil, Colored Pencils, Calculator Introduction to Density – Bookshelf – 2 sheets 4 sides Cornell Notes – Physical vs. Chemical – DO NOT TURN IN YET. Reminders. Test #1 – Parent Signature + 5 corrections and WHY YOU MISSED THEM- Due tomorrow

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### Today in Science

You will Need:

Pencil, Colored Pencils, Calculator

Introduction to Density– Bookshelf – 2 sheets 4 sides

Cornell Notes – Physical vs. Chemical – DO NOT TURN IN YET

### Reminders

Test #1 – Parent Signature + 5 corrections and WHY YOU MISSED THEM- Due tomorrow

Test #1 Retakes – Schedule on front board

### Summary

At the end of your Cornell Notes for Physical vs. Chemical:

1) Tell what the difference is between Physical & Chemical Changes…..or how can you determine whether a substance has gone through a physical or chemical change?

2) Why is density an effective way of identifying a specific type of matter?

How tightly packed the particles are in a substance.

vs.

1. What is mass effected by?

A block of iron has very tightly packed compared to aluminum.

2. Will changing the volume change the density?

NO. Density is a RATIO between mass and volume….the particles remain packed the same way no matter what the size of the sample.

• Use a G.C.

• bxh

• displacement

Yes. You will have more particles so mass will increase. BUT the density is the same.

vs.

4. Will changing the volume change the mass?

Yes, less particles per volume = less density.

vs.

Yes. You will have more particles so mass will increase. Density is the same because particles are packed the same way.

vs.

6. Will changing the volume change the mass? The density?

• The length is 3 cm the width is 4 cm and the height is 5 cm.

• The length is 4 dm, the width is 6 dm and height is 9 dm. The volume is?

• The length is 10 m, the width is 4 meters the height is 7 meters. The volume is?

Copy chart onto Cornell Notes

• Please Circle EITHER Same or Different….then complete the Sentence.

Answer in complete sentences:

11. Explain why a substance, such as iron, cut into different sizes, would still have the same DENSITY.

Test #1 – Signature + 5 Corrections & why you missed them Due tomorrow