Fossils can be used to match up rock layers. As organisms change over time, they look different. Older fossils will look different than younger fossils. Some organisms only survived for a short time before going extinct. Knowing what organisms looked like at certain times also helps date rock layers. Some fossils are better than others for this use. The fossils that are very distinct at certain times of Earths history are called index fossils. Index fossils are commonly used to match rock layers. You can see how this works in Figure 2.30. If two rock layers have the same index fossils, then they're probably about the same age.
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QUESTION: What helps to date rock layers?

Energy is stored in chemical compounds. This energy is called chemical energy. Chemical energy is a form of potential energy. When bonds between atoms are broken, energy is released. The wood in fireplaces has chemical energy. The energy is released as heat and light when the wood burns. Most living things get their energy from food. When food molecules are broken down, the energy is released. It may then be used to do work, like playing ball or studying science. If you have ever heard, "Eat a good breakfast", thats why. You need energy to do things during the day. To do those things you need energy. You get your energy from the food you eat. That energy is stored in your body until you need it. How did you get to school today? If you walked, you used chemical energy from the food you ate. What if you rode the bus or were driven in a car? Where did that energy come from?
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QUESTION: What is released when chemical compounds break down?

Joey got a German Shepherd for his birthday present. He had never had any pets before, but was always excited to see the other dogs and cats in his neighborhood. Since his birthday was in June, he spent a lot of time playing outside with his new puppy, which he named Max. Max and Joey would often run through fields in a game of chase. They also liked to go through the small forest behind the house, making a game of hide and seek. They never went near the lake because Joey was afraid of water. One day, Max hid a little too well and Joey couldn't find him. Joey spent the afternoon looking for his German Shepherd where they often played, like the field and forest. Joey was a shy boy who often read by himself, and Max was his best friend. After dinner, he went to look for Max one last time before he had to take a bath and go to bed. He heard some barking on the next street, so he ran to see if it was his puppy. Sure enough, he saw Max playing with a poodle. The dogs were having so much fun. Joey brought Max home, happy that he had his puppy back. Max seemed to be happy to have his human by his side as well as a new doggy friend. All summer long, Joey took Max to the poodle's house so they could play without having to worry about losing his present.
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QUESTION: Who is the new doggy friend of Max?

"Femme" is an apt description of the depiction of Madame White Snake and all her incarnations. It refers to a woman who is dangerously attractive, and lures men to their downfall with her sexual attractiveness. In both incarnations of Madame White snake, the authors depict her as bewitchingly beautiful. Toyoo, her human lover in "Lust of the White Serpant" cannot shake the image of her beauty from his mind and dreams of her, and finds himself "disturbed and agitated" by her "ethereal beauty". In "Eternal Prisoner," Madame White Snake's bewitching beauty follows her lover Hsu into his dreams, and the next morning "he was so distracted that he could not concentrate on doing business." Both of these stories align negative connotations with her beauty, suggesting that her sexuality is the cause of their distraction. In addition to distracting sexuality, the irregular characterization of Madame White Snake might be another trait her character has in common with the archetypical noir femme fatale. In her essay analyzing the noir film from a feminist perspective, Christine Gledhill writes "Not only is the hero frequently not sure whether the woman is honest or a deceiver, but the heroine's characterisation is itself fractured so that it is not evident to the audience whether she fills the [femme fatale] stereotype or not".
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QUESTION:
What are the two incarnations of Madame White Snake?