2. Science Foundations 12/2/14 In: How is igneous rock formed? a.Broken pieces of rock and sand get cemented together b.Formed in stars c.Morphing of existing rock d.Hardened lava from volcanoes

3. Radioactive Dating Review Problem The half-life of carbon-14 is 5,700 years. That means after 5,700 years half of any sample of carbon-14 decays to form the daughter element of carbon-14. How old is a fossil that has 1/16 of its original carbon-14 remaining?

4. Science Foundations 12/2/14 Through: 1.Pennies half life lab

5. Science Foundations 12/2/14 Out: Why does a hot air balloon rise? a.The hot air inside has lower density b.The hot air inside has higher density c.The hot air inside makes the balloon decrease in size d.The hot air inside makes the balloon increase in size