原版英语RAZ 教案Gems - Treasures from the Earth_CQ.pdf

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1、 Learning AZ All rights reserved.www.readinga-Quick CheckLEVELInstructions:Read each question carefully and choose the best answer.Name Date Quick Check continued on following pageY Y1.Why do rare gems cost a great amount of money?A They are rare.B Mining them is often done by hand.C They are only f

2、ound deep within the earth.D All of the above2.Where are most crystals formed?A on the slopes of volcanoesB deep within the earthC in rivers in AfricaD all of the above3.How are crystals and organic gems different?A Crystals are minerals,and organic gems come from living things.B Crystals are found

3、near the surface of the earth,and organic gems come from deep within the earth.C Crystals are skeletons of tiny sea creatures,and organic gems are mixed minerals with strict shapes.D Crystals are used in jewelry,and organic gems are used on tools.4.What are atoms?A types of gems created from crystal

4、sB very small particles that make up all things on Earth C certain types of gems found only in South AmericaD types of sea creatures that form coral reefsGems:Treasures from the Earth Learning AZ All rights reserved.www.readinga-Quick Check(continued)LEVELName Date Quick Check continued on following

5、 pageY YGems:Treasures from the Earth5.Why is it important for a gem in a ring to be high on the Mohs scale?A so it will have a purer colorB so it will not have any streaks or grainC so it will not be damaged during wearD so it will be closer to a diamond on the scale6.How is a gem valued?A by where

6、 it was minedB by how many facets it containsC by how hard it was to locate and mineD by its cut,carat,color,and clarity7.What is not true about natural pearls?A They can take years to form.B They are perfectly round.C They are an organic gemstone.D They form inside oysters from a grain of sand.8.Wh

7、ich of the following includes an opinion?A The most valuable quartz is a stone called opal.B Blue-green turquoise often has pretty spots and streaks running through it.C Gem-quality emeralds are rare and usually small.D Quartz is found all over the world,in all colors of the rainbow.9.What type of g

8、em is formed when a mineral is squeezed under layers of rock?A diamondB emeraldC pearlD opal10.Which of the following is not a crystal?A a diamondB a pearlC a sapphireD an opal Learning AZ All rights reserved.www.readinga-Quick Check(continued)LEVELName Date Y YGems:Treasures from the Earth11.Extend

9、ed Response:How can creating gems in a lab benefit people and the environment?12.Extended Response:Would you like to be a miner searching for valuable gems?Support your opinion with at least two reasons.Learning AZ All rights reserved.www.readinga-Quick Check Answer SheetLEVELY YMain Comprehension S

10、kill:Cause and EffectGems:Treasures from the Earth 1.D Cause and Effect 2.B Main Idea and Details 3.A Compare and Contrast 4.B Vocabulary 5.C Make Inferences/Draw Conclusions 6.D Main Idea and Details 7.B Main Idea and Details 8.B Fact or Opinion 9.A Cause and Effect 10.B Vocabulary 11.Answers will vary somewhat but should include the following:mining gems is not always safe and growing gems in a lab cost a thousand times less.12.Answers will vary.