Answer the questions at the end based on the text.

Depleted uranium is also used as a shielding material in some containers used to store and transport radioactive materials. While the metal itself is radioactive, its high density makes it more effective than lead in halting radiation from strong sources such as radium. Other uses of depleted uranium include counterweights for aircraft control surfaces, as ballast for missile re-entry vehicles and as a shielding material. Due to its high density, this material is found in inertial guidance systems and in gyroscopic compasses. Depleted uranium is preferred over similarly dense metals due to its ability to be easily machined and cast as well as its relatively low cost. The main risk of exposure to depleted uranium is chemical poisoning by uranium oxide rather than radioactivity (uranium being only a weak alpha emitter).

The discovery and isolation of radium in uranium ore (pitchblende) by Marie Curie sparked the development of uranium mining to extract the radium, which was used to make glow-in-the-dark paints for clock and aircraft dials. This left a prodigious quantity of uranium as a waste product, since it takes three tonnes of uranium to extract one gram of radium. This waste product was diverted to the glazing industry, making uranium glazes very inexpensive and abundant. Besides the pottery glazes, uranium tile glazes accounted for the bulk of the use, including common bathroom and kitchen tiles which can be produced in green, yellow, mauve, black, blue, red and other colors.

1. What is used to shield radioactive waste?
2. Give an example of radioactive material it might shield
3. Is depleted uranium a metal?
4. Is it radioactive?
5. Is it dense?
6. What else is it used for?
7. Is it expensive?
8. What is the main risk of its use?
9. Who discovered radium?
10. Radium is a part of what ore?
11. What were the original uses of radium?
12. How much uranium is needed to get a gram of radium?
13. How is the waste utilized?
14. Is uranium glaze cheap?
15. What product is the glazed used upon?
16. In which colors?

Numbered answers:

A: 1. Depleted uranium
2. radium
3. yes
4. yes
5. yes
6. counterweights for aircraft control surfaces
7. no
8. chemical poisoning by uranium oxide
9. Marie Curie
10. uranium ore
11. glow-in-the-dark paints for clock and aircraft dials
12. three tonnes
13. the glazing industry,
14. yes
15. common bathroom and kitchen tiles
16. green, yellow, mauve, black, blue, red and other colors

Answer the questions at the end based on the text.

CHAPTER IX.

A RACE ON THE ICE, AND WHAT FOLLOWED.

After the events just narrated several days passed quietly enough at Putnam Hall. In the meantime the weather continued clear, and the boys took it upon themselves to clear off a part of the lake for skating. Then, one night came a strong wind, and the next morning they found a space of cleared ice nearly half a mile long.

"Now for some fine skating!" exclaimed Tom, as he rushed back to the Hall after an inspection of the lake's smooth surface. "We can have all the racing we wish."

"It's a pity Sam can't go out yet," returned Dick. Sam was back to the school, but his cold had not entirely left him.

"Never mind; here are several new magazines he can read," returned Tom, who had been to town with Snuggers on an errand and had purchased them at the stationery store.

"I would just as soon read now," said Sam. "The magazines look mighty interesting."

Just then Fred Garrison came in, accompanied by George Granbury. They had been down to Cedarville to purchase some skates and a new pair of shoes for George.

"Hullo, what do you think we saw in Cedarville!" cried Fred, as soon as he caught sight of the Rovers.

"Lots of snow," suggested Tom dryly.

"Yes--and more."

"A mighty dull town," suggested Sam.

"We saw Dan Baxter."

"What was he doing?"

"He was walking down the street. And who do you suppose was with him? Mr. Grinder!"

1. What did the boys do to the lake?
2. For what purpose?
3. What is the number of this chapter?
4. And the title?
5. Why can't Sam go skating?
6. What could Sam do instead?
7. Where had Tom gotten the magazines?
8. True of False: The top of the lake was rough.
9. Where had Fred and George been?
10. Did they buy something for George?
11. What?
12. Did they buy something for Tom?
13. How far was the ice cleared off the lake?
14. With whom had Tom gone to town?
15. True or False: Sam thought the reading material looked boring.
16. Who is the first person Fred mentioned seeing?
17. And the second?
18. Were the two mentioned seen together?
19. What were they doing?
20. Did Fred and George buy skates?

Numbered answers:

A: 1. They cleared off a part of it.
2. For skating.
3. IX.
4. A RACE ON THE ICE, AND WHAT FOLLOWED.
5. his cold had not entirely left him.
6. Read Tom's magazines.
7. At the stationery store.
8. False
9. To Cedarville
10. Yes.
11. a new pair of shoes
12. Unknown.
13. Nearly half a mile
14. Snuggers
15. False.
16. Dan Baxter
17. Mr. Grinder
18. Yes.
19. Walking down the street.
20. Yes.

Answer the questions at the end based on the text.

CHAPTER 71

The terrace of the Villa Catalano, with its orange and palm trees, looked upon a sea of lapiz lazuli, and rose from a shelving shore of aloes and arbutus. The waters reflected the color of the sky, and all the foliage wag bedewed with the same violet light of morn which bathed the softness of the distant mountains, and the undulating beauty of the ever-varying coast.

Lothair was walking on the terrace, his favorite walk, for it was the duly occasion on which he ever found himself alone. Not that he had any reason to complain of his companions. More complete ones could scarcely be selected. Travel, which, they say, tries all tempers, had only proved the engaging equanimity of Catesby, and had never disturbed the amiable repose of his brother priest: and then they were so entertaining and so instructive, as well as handy and experienced in all common things. The monsignore had so much taste and feeling, and various knowledge; and as for the reverend father, all the antiquaries they daily encountered were mere children in his hands, who, without effort, could explain and illustrate every scene and object, and spoke as if he had never given a thought to any other theme than Sicily and Syracuse, the expedition of Nicias, and the adventures of Agathocles. And yet, during all their travels, Lothair felt that he never was alone. This was remarkable at the great cities, such as Messina and Palermo, but it was a prevalent habit in less-frequented places. There was a petty town near them, which he had never visited alone, although he had made more than one attempt with that view; and it was only on the terrace in the early morn, a spot whence he could be observed from the villa, and which did not easily communicate with the precipitous and surrounding scenery, that Lothair would indulge that habit of introspection which he had pursued through many a long ride, and which to him was a never-failing source of interest and even excitement.

1. where was Lothair walking?
2. what did it overlook?
3. did he enjoy the walk?
4. did he have pleasant travelling companions?
5. Did Catesby have a short temper?
6. Did Lothair feel lonely?
7. what was the name of the Villa they were staying?
8. did it have a nice view??
9. could he see the sea?
10. how about the mountains?

Numbered answers:

A:
1. the terrace
2. unknown
3. yes
4. Yes
5. No
6. No
7. Villa Catalano
8. Yes
9. Yes
10. Yes