NEW
Font size
WorksheetsSCIENCE MIND CHALLENGE FIRST QUARTER
Total questions: 45
Worksheet time: 23mins
According to Newton's first law of motion, what will happen to a moving object that is not acted on by an unbalanced force?
Will accelerates.
Will change its momentum.
Will remain in motion.
Will eventually come to a stop.
Which of the following scenarios shows that there is NO net force present?
A billboard hanging steadily.
An overripe guava falling off a tree.
A police car running after an errant person.
A bicycle slowing down before making a turn.
In a local supermarket, you can easily push a shopping cart with 10 kilograms of household products than a shopping cart with 20 kilograms of household products to the counter. Which Law of Motion best explains the given situation?
Law of Acceleration
Law of Inertia
Law of Action-Reaction
Law of Interaction
A ball thrown upward will apparently stop and fall back to the ground, what type of force could have caused the falling of the ball?
Elastic Force
Gravitational Force
Frictional Force
Normal Force
You are riding in a bus and the driver suddenly applied his force to the brakes. You notice that your body moves forward, the bus moves again, and your body moves backward. Which property of matter illustrates this observation?
Force
Mass
Inertia
Net Force
If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration? (F=ma)
The one with a mass of 0.78 kg will have the greatest acceleration.
The one with a mass of 0.52 kg will have the greatest acceleration.
They will both accelerate at the same rate.
Cannot be determined.
What could best refer to Newton's Third Law of Motion?
In every action there is an equal opposite reaction.
The magnitude of an object is always equal to the inertia.
Force is always equal to the mass and the acceleration of an object.
An object at rest or move at a constant velocity unless an unbalance external force acted upon it.
You accidentally hit a rock with your foot as a result you got hurt; this reaction is an example of what law of motion?
Law of conservation of Momentum
Newton's Law of Inertia
Newton's Law of Acceleration
Newton's Law of Interaction
You hit a wall with a stick. What would be the equal and opposite reaction?
the wall pushes against you
you push against the stick
the stick pushes against you
the wall pushes against the stick
Tug of war is a game that tests the strength of two opposing teams. Two groups of Grade 8 students in a tug of war are pulling the rope with the same amount of force. Applying Newton's Law of Motion, what will happen to the groups of students?
Group A will win.
Group B will win.
Group A and B will fall.
Group A and B will not move.
Based on Newton's Law of Interaction, what would be the reaction force, if the action force is 60 N to the right?
60 N to the right
30 N to the left
60 N to the left
9.8 N to the right
Which of the following is an example of kinetic energy?
An apple in a tree
A bouncy ball on the table
A car driving on the highway
A stretched-out rubber band
If the speed of an object doubles what will happen to its kinetic energy?
Doubles
Quadruples
Is reduced to one - fourth
Is reduced to one - half
What is the gravitational potential energy of a 5.0 kg object that is lifted to a height of 5.0 m?
240 J
245 J
249 J
250 J
Which is quieter, a room with hanging curtains or one with bare concrete walls? Why?
Both rooms have the tendency to be peaceful and to be quiet depending on the location.
It is quieter in a room with concrete walls because sound travels faster in medium with the higher elastic property at the molecular level.
It is quieter in a room with curtains because the bare concrete wall brings about multiple reflections of sound.
It is quieter in a room with bare walls because hanging curtains enhance the effect of sound reverberation.
Concerts usually take place during nighttime where everyone has a chance to see and to enjoy the live show. Why does sound contribute to the concert schedule?
Sound is more audible at night due to minimal noise.
Sound propagates faster in air at night than at daytime.
Sound is heard well in far areas during nighttime than during daytime.
Sound changes and refracts when it encounters a medium of different density.
When a boy yells his name inside a cave, the sound reflects off the walls of the cave and travels back to his ears. What do you call the reflected sound?
density
echo
echolocation
refraction
Which has the least energy among the colors of a rainbow?
green
red
orange
violet
What refers to the bending of light as it passes from one medium into another?
frequency
refraction
reflection
wavelength
What natural phenomenon is an excellent illustration of the dispersion of white light?
Eclipse
Mirage
Rainbow
Typhoon
Which of the following is NOT characteristics of color violet?
It has the greatest energy.
It has the lowest frequency.
It has the greatest frequency.
It has the shortest wavelength.
Which term is used to describe the transfer of energy between places or objects due to a temperature difference?
Heat
Temperature
Internal energy
Thermal energy
Why does liquid in the thermometer rise when put in hot water?
The liquid is boiling.
The liquid is evaporating.
The liquid gains heat from the hot water causing it to expand.
The liquid loses heat from the hot water causing it to contract.
What is the specific heat capacity of liquid water?
2100 J/kg 0C
3470 J/kg 0C
2450 J/kg 0C
4186 J/kg 0C
What could be the reason for the sagging of electrical power lines on a hot day?
pollution
global warming
climate change
thermal expansion
Which of the following is true about the relationship between the temperature of water and the average temperature kinetic energy of the moving particles of water?
The higher the temperature of water, the greater the kinetic energy of the moving particles
The higher the temperature of water, the lower the kinetic energy of the moving particles.
The temperature of the water is inversely proportional to the kinetic energy of moving particles.
The temperature of the water and the kinetic energy of the moving particles of water are not related.
Which circuit has the greatest current? A circuit with_____________________.
one dry cell.
three dry cells.
two dry cells.
four dry cells.
Silver is considered the best conductor but is very expensive. Copper is close, and much less expensive, which is why most wires are made of copper. What can copper do in the flow of current in a circuit?
It opposes the flow of electrons in a circuit.
It prevents the flow of charges in a circuit.
It delays more electrons that flow in the circuit.
It allows more charges to pass through the circuit.
Which of the following quantities remains the same throughout the series circuit?
Charge
Resistance
Current
Voltage
What happens to the brightness of the bulbs connected in series when more and more bulbs are added to the circuit?
decreases
remains the same.
increases
cannot be predicted.
In a series circuit, if one light bulb is burned out, what will happen to the other light bulbs?
They will not light up
The brightness will increase.
They will continue to light up
The brightness will decrease.
Which of the following is a disadvantage of connecting too many bulbs in a parallel connection?
Even if you switch off one bulb, other bulbs are not affected.
It requires the use of several conducting wires of varying sizes.
All bulbs in parallel connection are directly connected to the voltage source.
Even if one of the light bulbs is damaged, all other light bulbs will still function.
The following are connected in parallel circuit at home EXCEPT:
Christmas lights
light bulbs
Refrigerator
Television
Which of the following electrical quantities in parallel circuit is constant?
Current
Total Resistance
Resistance
Voltage
After learning that sound travels faster on a particular state of matter. Joshua is decided to make his own telephone string, to have best result on the quality of sound what would be the best material for his telephone.
A string and a pair of plastic cups
A string and a pair of glass
A string and a pair of styrofoam cups
A string and a pair of can
Most of the appliances around the house use electricity that is why it is a must to have several safety devices to prevent fire and electrocution. Which of the following statements is NOT true about safety devices used at home?
use to prevent electric shock.
cut the flow of current in case of overloading.
used to provide an alternative route for current in the case of a grounded circuit.
supply an unsteady amount of voltage to protect appliances against overloading.
Lito has connected his phone charger in the same socket where the television and computer were plugged in. How can you describe this electrical practice by Lito?
Electric shock
Overloading
Heating effect
Short circuit
What will be most likely to happen when two wires have touched that should not have, perhaps because of a defective insulation?
Electric Shock
Overloading
Octopus wiring
Short circuit
Which electrical device shuts down when there is overloading in the circuit?
circuit breaker
fuse
electrical switch
voltage source
Which electrical device blows up when there is overloading in the circuit?
circuit breaker
fuse
electrical switch
resistor
Which of the following surely depicts a fuse or a circuit breaker that opens?
A 25 - A fuse has a current passing through it that is equal to 30 A.
A 50 - A circuit breaker with a current flowing through it equal to 50 A.
A 45 - A fuse that experiences an electric current that is less than 45 A.
A 30 - A circuit breaker receives an amount of current that is equal to 26 A.
1. The following are advantages of a series circuit EXCEPT:
A. Series circuits do not overheat easily.
B. Easy to install and easy to repair and maintain
C. All loads in a series circuit have the same current.
D. If one load fails, all loads in the circuit will not function.
1. A water heater has a resistance of 22 Ω connected to a 220-V voltage source. What is the needed current to operate the heater?
A. 5 A
B. 7 A
C. 8 A
D. 10 A
1. A motorcycle starter motor needs 40.0 A to operate with a resistance of 0.150 ohms. What is the needed voltage to start the motor?
A. 5.00 V
B. 6.00 V
C. 7.00 V
D. 8.00 V
1. In the table given, which of the following electrical appliances has the least amount of current flowing in it?
A. TV
B. Electric Fan
C. Rice Cooker
D. Washing Machine
