People's education edition eighth grade physics examination questions

Eight grades of nine-year compulsory education (1)

Evaluation of students' development goals 《 Physics 》 (review questions at the end of last semester in autumn 2005)

_ _ _ Class ID _ _ _ _ _ Name _ _ _ _ Result

1. Fill in the blanks (65438+ 0.5 point for each small question, 45 points in total)

1, a classmate measured some data, but forgot to write the unit. Please give him a suitable unit:

A. Xiaohong's height is1.65 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

C, half-court football match 45 _ _ _ _ min _ _ _, d, the height of a classroom is about 3 _ _ _.

2, the speed of light in a vacuum is _ _ _ _ _, the sun can reach the earth in about 8_, and the distance from the sun to the earth is about _ _ _ _ _, the speed of light in other transparent substances is slower than that in a vacuum _ _ _ _.

3. The sound is produced by the vibration of the object _ _ _ _ _, and the flute sound is produced by the vibration of the air column in the pipe _ _ _ _. Astronauts on the moon talk by radio because _ _ _ _ can't spread sound.

4. Someone sits on the boat at a constant speed. Compared with people, the boat is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. If the ship's speed is 2m/s, then after10s, the ship has passed _ _ _ _ meters.

5. A classmate has measured that her average walking speed is 1.2m/s_, that is _ _ _ km/h, and her home is 720m away from school. In order not to be late, she should leave home at least _ _ _ _ _ _ minutes in advance.

6, A, B two objects moving in a straight line at a uniform speed, the ratio of the distance passed is 3: 2, and the ratio of the time spent is 2: 3, so the ratio of their speeds is _ _ _ _ _ _.

7.a and B are 32m apart. When an object moves from A to B at variable speed, it takes 4s to move from A to C on the way. After staying here for 1s, it takes 3s to move on to B, so the average speed of an object from A to B is _ _.

On a quiet night, the moon appeared in the well. The naughty little monkey hung upside down on a rope and tried to salvage the moon. Anyway, they can't catch it. When the little monkey was in a hurry, a little monkey fell into the well. Oh, no! The moon is gone. The moon in the well is imaged by _ _ _ _ _, and the disappearance of the moon is the reason why the calm water surface is broken and _ _ _ _ _.

9. Sunlight is composed of red, orange, … _ _ _ _, and the picture of color TV is composed of _ _ _ _ _ _ _.

10, the lens of the eye is equivalent to a _ _ _ _ _ lens. The light of the object passes through the pupil and is imaged on the retina through the lens. If the lens is diseased, people will not be able to see things clearly. If it is imaged in front of the retina, it will be corrected with a _ _ _ _ lens.

1 1. When observing an object with a magnifying glass, the object should be placed within _ _ of the convex lens.

12, the force produced by object deformation is called _ _ _ _ _ _. The attraction among friction, gravity, tension, pressure and charge in life belongs to _ _ _ _.

13, and the picture on the right shows the situation of "tortoise and rabbit race". After the start of the race, "spectators" thought that the rabbit running in front was faster than _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. Because the rabbit was paralyzed and underestimated his enemy, he slept in the middle. By comparison, the "referee" decided that the tortoise who reached the finish line first was fast. In physics, _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ refers to

14, people put on roller skates and pushed the wall hard. People are _ _ _ _ _ _ _ objects, and the walls are _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Second, multiple-choice questions (3 points per grid, a total of 30 points)

1, "If I see farther than others, it is because I stand on the shoulders of giants." Who said this famous saying ()

A, Einstein B, Newton C, Deng Xiaoping D, Mao Zedong

2, the length of your body close to 50 mm is ()

A, thumb nail width b, thumb length c, shoulder width d, hair diameter.

3. There is a sign on the bridge as shown in Figure 3, which means ().

A, cars passing through 150N cannot pass.

B 147 is allowed for heavy trucks.

C. The bridge quality is 15t.

D, bridge length 15m.

4, the following measures to reduce noise, belong to weaken in the process of communication is ()

A, the noise of the construction site should be limited. B. plant grass and trees in the urban area.

C. wear anti-noise earplugs; D, urban car horn is forbidden to ring.

5. A classmate stood in front of a flat mirror and looked in the mirror. Her appearance in the flat mirror is ().

One, a real image bigger than her, and a real image smaller than her.

C. Virtual image D is smaller than her, and the virtual image is as big as her.

6. Regarding the phenomenon of light reflection, the following statement is correct.

Light from air perpendicular to the water surface cannot be reflected.

B. An incident ray has multiple reflected rays on an interface.

C, when reflection occurs, the optical path is reversible.

D, when the incident light is close to the normal, the reflected light is far away from the normal.

7, the following instruments become magnified real image is

A, magnifying glass _ _ b, camera _ _ c, flat mirror _ _ d, slide projector

8. The original length of the spring is10cm. When a weight of 100N is hung, the spring becomes 12cm. If a 200-Newton weight is suspended, the length of the spring becomes _

a、 16cm____B、6cm _ _ _ _ C、 14cm _ _ _ _ D、 19cm

9. In order to reduce friction, the following examples are

A, improve the speed of the object _ _ b, hard on the brakes when emergency braking.

C, put a small wheel on the suitcase, and _ _ _ _ _ _ D apply magnesium powder to the weightlifter before lifting the barbell.

10, if the air resistance is not released, all the stones thrown from the hand are in the air.

A, gravity and hand thrust _ _ b, gravity

C, gravity and the earth's gravity _ _ D, forward momentum

Iii. Drawing (9 points)

1, complete the light path diagram shown below, and draw the appropriate type of lens in the box.

As shown in the figure below, the sunlight forms an angle of 60 degrees with the horizontal plane. Use a plane mirror to make sunlight shine vertically on the bottom of the well. Please draw a picture to determine the position of the plane mirror and mark the degree of the included angle between the plane mirror and the horizontal plane.

3. As shown in the picture on the right, put an object weighing 40N on a horizontal table, and draw a force diagram to draw the force on the object.

Four, experimental questions (9 points)

1, (3 points) A classmate made a flat mirror imaging experiment with candles, glass plates, scales and other equipment, and obtained the following data.

Distance from candle to flat mirror

5cm 5cm

10cm 10cm

15cm 15cm

From these data, you can draw the conclusion that _ _ _ _ _ _ _ _ _ _ refers to

2. Please fill in the missing contents in the inquiry report below.

⑴ Ask a question: Does the average speed change when the car is driving along the slope from top to bottom?

(2) Guess (please guess the question): (1')

(3) Experimental design scheme:

Experimental equipment (as shown in figure 1 1): long board, wood block, trolley, scale, stopwatch.

Figure 1 1

Main experimental steps: (2')

Experimental data record table (designed experimental data record table): (2')

⑷ Experimental conclusion: 1'

Five, the calculation problem (7 points)

Taxi fare invoice

Car number

Chuan F-7 1238

Date 05-09-28

Get on the bus 10: 00

/kloc-get off at 0: 05.

The unit price is 2.00 yuan.

The mileage is 6.0 kilometers.

The amount is 16.00 yuan.

Someone took a taxi and drove at a constant speed on a straight highway. On the right is the fare invoice when he arrived at his destination by bus. Q:

(1) Taxi travel time.

(2) the speed of the taxi.

I'm in grade eight, too. My teacher said it was good.