2. Which of the following gases do plants use in photosynthesis? A hydrogen B oxygen C carbon dioxide D carbon monoxide

3. Which student correctly identifies evidence of a chemical change? A student 1 B student 2 C student 3 D student 4 November 5, 2012

4. Students drew pictures of four different experiments. Which picture most likely represents an experiment where there was a chemical change? November 6, 2012

5. 4. Which activity below does not represent a chemical change? A burning logs B ripening pears C decaying leaves D melting ice cubes November 7, 2012

6. How do most fish get the oxygen they need to survive? A) They take in water and break it down into hydrogen and oxygen. B) Using their gills, they take in oxygen that is dissolved in water. C) They get their oxygen from the food they eat. D) They come to the surface every few minutes to breathe air into their lungs. November 9, 2012

8. Which best describes a parallel circuit? A Electricity flows along one pathway. B The flow of electricity comes from one source. C Electricity flows along more than one pathway. D The flow of electricity comes from more than one source. November 6, 2012

9. The picture shows a way you could hook up a battery, three wires, and a light bulb. Explain how you could use these things to test an item to see if it is a conductor of electricity. How could you tell? ___________________________________________________________________________ ___________________________________________________________________________ November 7, 2012

10. When homemade ice cream is made, salt is added to the ice that surrounds the ice cream chamber. Which property of salt is important when making ice cream? A Salt conducts electricity in water. B Salt dissolves in water. C Salt lowers the freezing point of water. D Salt adds flavor to the ice cream mixture. November 13, 2012

11. Look at each item in the list below. Decide if it conducts electricity or does not conduct electricity. Put an X in the box to show what you decided. November 8, 2012