1. A book will heat up if placed in the sunlight. Why is this not an example of
2. Describe a real-life situation of your own where heat is being transferred via conduction. Describe which objects are gaining heat and which objects are losing heat.
3. You need to melt a whole stick of butter in a pan for a recipe. How can you make the butter melt faster without turning up the heat? Why does this trick work?
4. It is important not to undercook chicken, otherwise you might get very sick. The inside of the chicken has to be at a certain temperature (75 C or 165 F) to make sure it is safe. Why can't you just wait until the outside of the chicken is at this temperature? Why isn't the entire chicken at the same temperature while it is being cooked?
5. You set an oven to 350 degrees F (180 C). You put uncooked cookies into the oven on a metal pan. Why do the cookies heat up? Does the oven temperature change as the cookies heat up? What happens if you unplug the oven (after it is already set at 350 degrees)? Your body is like an "oven" set to 98 degrees F or 37 degrees C. Questions 6-8 are related to this idea.
6. Explain why your body is almost always giving out heat to the environment, rather than taking it in from the environment.
7. Why does your body need to have an energy source? Where does your body get energy from?
8. Even though your internal body temperature stays around 37 degrees C, the temperature of your skin does change. Is the outside of your skin usually at a higher temperature or lower temperature than 37 degrees C? Is the opposite ever true? Explain why.
9. A hot cup of coffee left out for a long time will eventually be the same temperature as the room it is in. If you put your finger in the coffee, though, it will still feel colder than the air in the room. Explain why.
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