RDA Science 8
Quiz by EVANGELINE PASCUAL
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Ronald rides a jeepney going to school. While traveling, the jeepney driver suddenly applied force to the brakes. He notices that his body moves forward, then the jeepney moves again, and his body moves backward. Which property of matter illustrates this observation?29
D. net Force
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Ronald rides a jeepney going to school. While traveling, the jeepney driver suddenly applied force to the brakes. He notices that his body moves forward, then the jeepney moves again, and his body moves backward. Which property of matter illustrates this observation?
D. net Force
Refer to the figure below which shows how the ball bounces on the ground. At what position does the ball have its greatest kinetic energy?
C. Position C
A. Position A
Which quantity has the greatest influence on the amount of kinetic energy a vehicle has while traveling down the road?
In 1947, Chuck Yeager became the first pilot inhistory confirmed to have exceeded the speed of sound in level flight. Which ofthe following reason did Chuck Yeager’s team consider in choosing a highaltitude to break the sound barrier?
D. when the temperature is constant, the speed of sound is also constant
B. when the temperature is higher, the speed of thesound is faster.
C. when the temperature is higher, the speed of the sound is slower
A. when the temperature is lower, the speed ofsound is faster30s
A rainbow can be seen in the sky after the rain.Which of the following statements best explains this spectacularphenomenon?
A. The white clouds served as a prism made of different colors
C. The colors of the rainbow were derived from the raindrops in the atmosphere
B. The raindrops act like a prism that separatessunlight into different colors.
D. The sunlight is reflected from the ground to the sky and separated into different colors.30s
Metals like gold, silver, iron, and copper are good heat and electrical conductors. Which of the following justifies metals as conductors of heat and electricity?
B. relatively high density of metals
D. similarity between thermal and electrical conductivity.
A. high elasticity of metals
C. looseness of the outer electron in the metal atom30s
Which of the following electrical symbols represents a resistor?30s
Current is directly proportional to voltage and inversely proportional to resistance. Across a circuit, what will happen to the current when the resistance is held constant while the voltage is doubled?
D.remains the same
In the table below, which of the following electrical appliances has the highest amount of current flowing in it?
Electrical Appliances Voltage (V) Resistance (Ω)
Electric fan 220 35
Rice cooker 220 40
Television 220 45
Washing machine 220 50
B. Rice cooker
Christmas lights that were used as decorations during the holiday season are typical examples of a series circuit connection. In a series circuit, if one light bulb is burned out, what will happen to the other light bulbs?
B. The brightness will increase.
C. The brightness will decrease.
A. They will not light up.
D. They will continue to light up.30s
Which of the following is a disadvantage of connecting too many bulbs in a parallelconnection?
B. It requires the use of several conducting wiresof varying sizes.
C. All bulbs in parallel connections are directly connected to the voltage source
D. Even if one of the light bulbs is damaged, allother light bulbs will still function
A. Even if you switch off one bulb, other bulbs are not affected30s
Most appliances around the house use electricitywhich requires several safety devices to prevent fire and electrocution. Whichof the following statements is NOT TRUEabout safety devices used at home?
C. They provide an alternative route for current in the case of a grounded circuit
A. They prevent electric shock
B. They cut the flow of current in case of overloading
D. They supply an unsteady amount of voltage toprotect appliances against overloading.30s
What device shows the expansion of air when there is an increase in temperature?
A. Thermograph C.Thermopile
Refer to the data in the table below, whichvehicle has the highest net force applied?
Vehicles Mass (kg) Acceleration (m/s²)
Bike 100 30
Motorcycle 120 22
Tractor 150 15
Truck 200 10
Tug of war is a game that tests the strength oft wo opposing teams. Two groups of Grade 8 students in a tug of war are pulling the rope with the same amount of forces. Applying Newton’s Law of Motion, what will happen to the groups of students?
D. Group A and B will not move
B. Group B will win
C. Group A and B will fall
A. Group A will win30s
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