1st Quarter Summative Test in Science 8
Quiz by Ma. Lorena S. Alejandria
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- Q1
A fast-moving small car collided with a large loaded truck. Which of the following statements concerning the force experienced by the car and the truck is correct?
The truck experienced the greater force.
The same force was experienced by the truck and the small car.
It’s impossible to tell since the mass and the acceleration were not given.
The small car experienced the greater force.
60sS8FE-Ia-16 - Q2
A book is placed on a table. If the book exerts a force of 15 N on the table, how much force does the table exert on the book?
3N
15N
9.8N
0N
60sS8FE-Ia-16 - Q3
If a man is pushing the cart to the left, what is the direction of the force exerted by the cart on the man?
upward
rightward
downward
leftward
60sS8FE-Ia-16 - Q4
In Newton’s third law of motion, the equal and opposite forces do not cancel out each other out. What is the reason for this?
The forces act on different systems.
The two forces are in the same direction.
The two forces act in parallel directions.
The forces have equal magnitudes.
60sS8FE-Ia-16 - Q5
Which of the following is important for the propagation of sound?
medium
space
distance
light
60sSC8-1-i2 - Q6
Why does sound travel faster in wood than in water?
The molecules in wood are tightly packed against each other, hence sound can be propagated easily.
The molecules in wood are bigger compared to the molecules in water.
There are more molecules in wood than in water.
The molecules in water collide randomly, hence sound can easily be transmitted.
60sSC8-1-i2 - Q7
The speed of sound in steel is 5960 m/s while its speed in air is 331 m/s. How fast does sound travel in steel than in air?
22 times that in air
25 times that in air
20 times that in air
18 times that in air
60sSC8-1-i2 - Q8
Why does sound travel faster at high temperature?
Because there are more molecules in the hotter surrounding.
Because the molecules of air become tightly packed.
Because air molecules have more energy and vibrate faster at a higher temperature
Because sound is louder at higher temperature.
60sSC8-1-i2 - Q9
Which of the following has the greatest effect on sound in air?
amplitude
temperature
frequency
wavelength
60sSC8-1-i2 - Q10
What is the natural tendency of an object to remain in a state of rest or remain in uniform motion in a straight line?
Velocity
Acceleration
Inertia
Interaction
60sS8FE-Ia-15 - Q11
The acceleration is _____________________ to the mass of the object. It means, as the mass increases the acceleration decreases.
very proportional
not proportional
inversely proportional
directly proportional
60sS8FE-Ia-15 - Q12
A boy pushed the table with 12 N. The table has a mass of 4 kg. What will be the acceleration of the table? Note that F = ma.
48 m/s2
3 kg
8 m/s2
3 m/s2
60sS8FE-Ia-15 - Q13
How much force is needed to accelerate the 2.5 kg ball at 4.5 m/s2. Note that F = ma.
11.25 N
2 N
11.25 m/s2
1.8 N
60sS8FE-Ia-15 - Q14
Which of the following is NOT a cause of a net force?
An object at rest will start moving.
An object in motion will eventually stop.
There is a change in direction of a moving object.
An object will continuously move at a constant velocity.
60sS8FE-Ia-15 - Q15
Which situation shows the greatest potential energy?
A motorbike parked at the top of the hill.
A ball rolling down a hill.
A boy running down the hill.
A basketball falls freely from a 20-storey building.
60sSC8-1-i1