丹城中学第二学期初一期中科学检测试题卷（Science test paper for the second semester of dancheng middle school）.doc

丹城中学第二学期初一期中科学检测试题卷（Science test paper for the second semester of dancheng middle school） Doc documents may have a poor browsing experience at the WAP end. It is recommended that you choose TXT, or download the source file to the native view. The class of the first semester of the second semester of dancheng middle school, the science test paper (shao yongcheng), class: The classmate, the classmate of everyone, after nearly half a semester learning science, after nearly half a semester learning science, you must have a lot of experience and please render them today, to share with parents and teachers. Gains. Please present them today and share them with your parents and teachers. You may not be able to answer this question today, but you will have to solve it sooner rather than later, but you will have to do it sooner rather than later, and you will get another harvest. May you succeed! A harvest. May you succeed! A: choice (1-20 questions 1 point per question, 21-35 per question 2 points, A total of 50 points) choice 1. In the winter many people in the classroom, A long time often A layer of water on the surface of the glass that glass cover, this is caused by water which is A process of evaporation () A, B, C, solidification liquefied D, sublimation 2. The components of air are calculated by volume, and the largest volume fraction is () A, oxygen B, rare gas C, nitrogen D and carbon dioxide The freshwater resources on earth are mainly found in () A, glacier B, groundwater C, river D, lake The state of water in nature usually has several () A, 1 B, 2 kinds C, 3 D, 4 kinds 5. Sunlight is A () A, monochromatic light B, chromatic light C, white light D, red light 6. In scientific experiments, there are certain tools for the use of medicine for the use of blocky solid drugs, usually used () A, tweezers B, medicine spoon C, paper slot D, and hand held 7. The following gas can cause the strip of Mars to be reignited with () A, oxygen B, hydrogen C, air D, water vapor Wat