DOS WEEK of Oct 15-18 2013

1. DOS WEEK ofOct 15-18 2013 SCIENCE

2. DOS Tuesday • 1. Lightning is an example of: • Current electricity • Static electricity • Magnetic attraction • Magnetic repulsion

3. DOS tuesday • The nucleus of an atom consist of 3 particles called: • Atoms, protons, electrons. • Protons (+), electrons (-), neutrons (no charge). • Molecules, elements, atoms. • None of the above.

4. DOS tuesday • 3. Opposite charges ______ or pull toward each other. • attract • repel • Both a and b • None of the above

5. DOS wednesday • 1. Charges that are the same ______ or push away from each other. • attract • repel • Both a and b • None of the above

6. DOS Wednesday • 2. In her investigation, Brooke cut up a banana that was still a little green. Jeff used a ripe banana that had black spots on it. What might explain the difference in their results? • The observations they made • The way they recorded their observations • The materials they used • The tools they used

7. DOS Wednesday • Which is an example of a physical change? • Burning wood • Tarnishing silver • A rusted nail • Slicing a banana

8. DOS Thursday • Someone gives you a sweater for your birthday, and you infer that it’s handmade. Which observation supports your inference or finding? • The sweater has stripes across the front. • It is too small for you. • It has no label that show who made it. • It came in a box from a store at the mall.

9. DOS Thursday • 2. What would happen if you removed the iron core from an electromagnet? • The magnetic field would push away other magnets. • The magnetic field would be weaker. • The electromagnet would no longer have a magnetic field. • The current in the wire coils would change direction.

10. DOS ThursDAY • 3. Ra’Shun helps cook meals for his family. Which of these is a chemical change? • Frying an egg • Boiling water • Cutting cheese into slices • Adding chocolate powder to milk