The sixth grade graduation examination paper of primary school science published by educational science edition.

Grades of Graduation Test Paper of Grade 6 in Primary School Science (answer time: 60 minutes)

1. Fill in the blanks (10, each space 1) 1. Magnifier is a convex lens with a thick center and a thin edge, which can enlarge the image of an object. 2. With the help of microscope, we can clearly observe that onion epidermis is composed of cells. The world is made of matter, and matter is always changing. The only star in the solar system is the sun, and the nearest planet is Mercury. The environmental problems in today's world mainly include white pollution and air pollution. True or false questions (20 points, 2 points for each question) 1. Frame tower structure has the characteristics of large bottom, heavy bottom and small wind resistance. Corrugated paper has strong bending resistance because it increases the thickness by changing the shape of the paper. (right) 3. The fly will not slide down on the vertical smooth glass, which is related to the structure of its wings. Hooke of the Netherlands invented the world's earliest microscope, which can magnify metal structures by 300 times. Microorganisms, like animals and plants, can also carry out life activities such as reproduction and metabolism. (right) 6. Pure rust can be attracted by magnets, but it cannot conduct electricity. (wrong) 7. The cause of the crater on the moon is currently recognized as "impact theory". (right) 8. The main feature of Ursa Major is Polaris, and that of Ursa Minor is the Big Dipper. 9. The Milky Way is actually a shining star belt. (Yes) 10. After landfill, various buildings and plants can be built on it. (Wrong) 3. Multiple choice questions (30 points, 3 points for each question) 1. Mechanical principles such as (B) are comprehensively applied to bicycles. A, inclined plane, shaft B, lever, inclined plane, shaft C, lever and pulley 2. Coal began to change hundreds of millions of years ago. A, plants b, lower organisms c, animals 3. The following is not crystal (b). A, salt b, glass c and alkaline surface 4. The following are side views of different magnifiers, of which () magnifier has the largest magnification. A, B, C and V. The food turns blue after dropping iodine, indicating that there are (C )A, protein B, fat C and starch in the food. 6. In September 2008, the astronaut (A) on the Shenzhou VII spacecraft in China realized the "spacewalk". A, Zhai Zhigang B, Liu Boming C, Jing Haipeng 7. The following statement is wrong (c). A, the universe is expanding B, the stars are moving C, and the light year is time unit 8. Sewage needs to be treated before it is discharged into natural waters. A, precipitation, filtration and disinfection b, disinfection, precipitation, filtration c, filtration, disinfection and precipitation 9. The sign shown in the picture is a. Jiuzhaigou B. Wolong C. Changbai Mountain.

Four, the connection problem (9 points) 1. Please connect the corresponding moon phases with lines. (3 points)

15,22, Grade 8,2. Connect. (7 points) Foxes, birds, mosses, flowering plants, Monopterus albus, mammalian vertebrates, impatiens, non-flowering plants, pigeons, fish and invertebrates.

Running water, chemical energy, motor, food, mechanical energy and gasoline V. Fill in the form: (7 points) What kind of change does the same point belong to * * Physical change of water freezing, physical change of broken wood strips, physical change of sawdust and nails mixing, chemical change of iodine dripping on bread, chemical change of baking soda and white vinegar mixing, and chemical change of candle burning.

5. Experimental problem (17) 1, pulley (3). Through observation, we can find that: ① When lifting a 50g object with device A, the reading of the spring scale is 50g (). ② In the two devices A and B, the device can save labor and change the direction of force.

2. Microscope (4 o'clock) (1) marks the corresponding parts in the drawing: objective table, eyepiece, reflector, objective lens and adjusting knob (2). In the experiment, we need to lower the lens barrel and fix our eyes (fill the objective lens or eyepiece). (3) The object image observed in the eyepiece is at the upper left. If you want to move the image to the middle, which direction do you think the slide should move? .

3. Drawing: Draw the position of the moon during the solar eclipse in the picture below. (4 points) Eclipses generally occur around the first day of the lunar calendar, and the western edge of the sun loses first when the eclipse occurs.