Earths magnetic field helps protect Earth and its organisms. It protects us from harmful particles given off by the sun. Most of the particles are attracted to the north and south magnetic poles. This is where Earths magnetic field is strongest. This is also where relatively few organisms live. Another benefit of Earths magnetic field is its use for navigation. People use compasses to detect Earths magnetic north pole. Knowing this helps them tell direction. Many animals have natural 'compasses' that work just as well. Birds like the garden warbler in Figure 1.36 use Earths magnetic field. They use it to guide their annual migrations. Recent research suggests that warblers and other migrating birds have structures in their eyes. These structures let them see Earths magnetic field as a visual pattern.

Question: "Where is Earths magnetic field strongest?"

Answer: "Tropic of Cancer"

Response: no

Miss Anderson dined out, and preferred to suppose that she had no time to think until she was on her way home along the empty road round Jakko at eleven o'clock that night. Then it pleased her to get out of her rickshaw and walk. There was an opulent moon, the vast hills curving down to the plains were all grey and silvery, and the deodars overhead fretted the road with dramatic shadows. About her hung the great stillness in a mighty loneliness in which little Simla is set, and it freed her from what had happened, so that she could look at it and cry out. She actually did speak, pausing in the little pavilion on the road where the nursemaids gather in the daytime, but very low, so that her words fell round her even in that silence, and hardly a deodar was aware. 'I will not go now,' she said. 'I will stay and realize that he is another woman's husband. That should cure me if anything will--to see him surrounded by the commonplaces of married life, that kind of married life. I will stay till she comes and a fortnight after. Besides, I want to see her--I want to see how far she comes short.' She was silent for a moment, and the moonlight played upon her smile of quiet triumph. 'He cares too,' she said; 'he cares too, but he doesn't know it, and I promise you one thing, Madeline Anderson, you won't help him to find out. And in five weeks I will go away and leave my love where I found it--on a mountaintop in the middle of Asia!'

Question: "What type of moon was visible at eleven o'clock?"

Answer: "A cresten moon"

Response: no

Sometimes traits can vary from parent to offspring. These changes are due to mutations. Mutations are a random change. Mutations are natural. Some mutations are harmful. In this case, the organism may not live to reproduce. The trait will not be passed onto offspring. Others variations in traits have no effect on survival. Can some mutations be good for a living thing? Other mutations can have great benefits. Imagine being the first moth that can blend into its background. It would have a better chance of survival. A living thing that survives is likely to have offspring. If it does, it may pass the new trait on to its offspring. Thats good news for the offspring. The offspring may be more likely to survive. Mutations are one way living things adapt to new conditions.

Question: "What are mutations?"

Answer: "Variances from parent to offspring"

Response: yes

My father was named James Page Jackson because he was born on the old Jackson plantation in Lancaster county, Virginia. He named one of his daughters Lancaster for a middle name in memory of his old home. Clarice Lancaster Jackson was her full name. A man named Galloway bought my father and brought him to Arkansas. Some called him by the name of Galloway, but my father always had all his children keep the name Jackson. There were fourteen of us, but only ten lived to grow up. He belonged to Mr. Galloway at the time of my birth, but even at that, I did not take the name Galloway as it would seem like I should. My father was a good carpenter; he was a fine cook, too; learned that back in Virginia. I'll tell you something interesting. The first cook stove ever brought to this town was one my father had his master to bring. He was cook at the Anthony House. You know about that, don't you? It was the first real fine hotel in Little Rock. When father went there to be head cook, all they had to cook on was big fireplaces and the big old Dutch ovens. Father just kept on telling about the stoves they had in Virginia, and at last they sent and got him one; it had to come by boat and took a long time. My father was proud that he was the one who set the first table ever spread in the Anthony House.

Question: "What was the Anthony House?"

Answer: "A hotel"

Response:
yes