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WorksheetsScience (Egypt-4th) - Lesson 2.3.2
Total questions: 25
Worksheet time: 31mins
Name
Class
Date
1.
When two objects of the same mass move with the same speed collide with each other, the resulted damage….
a)
a. is larger in one of them and smaller in the other.
b)
b. is equal in both of the two objects.
c)
c. doesn't depend on the mass of the two objects.
d)
d. doesn't depend on the speed of the two objects.
2.
2. On collision energy is…
a)
a. created.
b)
b. destroyed.
c)
c. created and transferred.
d)
d. transferred and change.
3.
3. How can we calculate the speed of an object ?....
a)
a. Speed = distance + time
b)
b. Speed = distance x time
c)
c. Speed = distance + time
d)
d. Speed = distance — time
4.
4. Which of the following is a measuring unit of speed ?....
a)
a. hr/km.
b)
b. seclm.
c)
c. kg/sec.
d)
d. m/sec.
5.
5. What is the speed of a car that travels 400 meters in 4 second ?...
a)
a. 100 m/sec. b. 20 m/sec.
b)
b. 20 m/sec.
c)
c. 30 m/sec.
d)
d. 40 m/sec.
6.
6. As the angle of a ramp decreases, the speed of a toy car rolling on it….and its kinetic energy…..
a)
a. increases — decreases.
b)
b. increases — increases.
c)
c. decreases — decreases.
d)
d. decreases — increases.
7.
7.An object keeps moving with same speed when
a)
a. its kinetic energy decreases.
b)
b. its potential energy increases.
c)
c. no another force stops it.
d)
d. another object collides with it.
8.
8. The two factors affecting the kinetic energy of an object are….
a)
a. its speed and the color.
b)
b. its mass and tho color.
c)
c. its speed and the mass.
d)
d. Its light and tho sound energies.
9.
The mass of an object…
a)
a. doesn't affect its potential energy or its kinetic energy.
b)
b. affects its potential energy and its kinetic onorgy.
c)
c. affects its potential energy only.
d)
d. affects its kinetic energy only.
10.
I. Fast-moving objects can be exposed to less damage than slow ones.
a)
True
b)
False
11.
2. A slow and light object has much kinetic energy.
a)
True
b)
False
12.
3. We cannot create a new form of energy and also we cannot destroy an existing form of energy.
a)
True
b)
False
13.
4. You have to drive a car as fast as possible, because at high speeds you can avoid collisions.
a)
True
b)
False
14.
5. To increase the speed of a moving object, you can collide it with another object that moves in the opposite direction.
a)
True
b)
False
15.
6. When two heavy and fast cars move in opposite directions collide together, they produce very small amount of damage.
a)
True
b)
False
16.
7. If two objects cover the same distance in the same time so, they have similar speed.
a)
True
b)
False
17.
8. We can measure the covered distance in kilometer unit.
a)
True
b)
False
18.
9. If car (A) covered a distance of 100 kilometers in one hour and car (B) covered a distance of 100 kilometers in two hours so, car (B) is faster than car (A).
a)
True
b)
False
19.
10. The angle of inclination of a ramp affects the speed of an object moving on it.
a)
True
b)
False
20.
Give a reason: When two objects collide with each other, you can hear a sound.
(a)
21.
Give a reason : Driving fast is very dangerous.
(a)
22.
What happens if: The speed of a car increases. (according to its kinetic energy)
(a)
23.
What happens if: Two bicycles move in an opposite direction, collide with each other.
(a)
24.
Find the speed of a runner, if you know that he covers 400 meters in 8 sec
(a)
25.
A train travels from Cairo to Alexandria in a distance of 200 kilometers in 2 hours. Find its speed.
(a)
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