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WorksheetsTHIRD Quarter Science 7 Exam
Total questions: 51
Worksheet time: 26mins
What term refers to a push or a pull that can cause an object to change its motion?
Acceleration
Momentum
Force
Energy
What is the standard unit for measuring force in the International System of Units (SI)?
Kilogram
Joule
Meter
Newton
In a free-body diagram, what does the length of an arrow typically represent?
The time the force is applied.
The direction of the force.
The magnitude (strength) of the force
The type of force applied.
A net force of zero is the result of what type of forces acting on an object?
Balanced forces
Gravitational forces
Unbalanced forces
Frictional forces
A box is pushed with a force of 100 N to the right, and the opposing friction is 20 N. What is the net force acting on the box?
120 N to the right
100 N to the right
80 N to the right
20 N to the left
An arrow representing a force of 50 N is twice as long as an arrow representing a force of 25 N. What principle of free-body diagrams is demonstrated here?
Forces are always drawn vertically.
The length of the arrow is proportional to the force magnitude.
The direction of the arrow determines the mass.
Only two forces can act on an object.
A cart moving across a floor at a constant velocity is acted upon by what type of forces?
Unbalanced forces
Gravitational forces
Balanced forces
Applied forces
What is the vector sum of all forces acting on an object called?
Total Force
Applied Force
Net Force
Frictional Force
What is the state of motion of an object when it is acted upon by an unbalanced force?
It remains at rest.
It maintains a constant velocity.
Its velocity changes (accelerates or decelerates).
Its mass increases.
A book resting on a table is in a state of equilibrium. If the book's weight is 15 N, what is the magnitude of the normal force exerted by the table?
0 N
15 N
30 N
7.5 N
Two students are pulling on a rope. Student A pulls with 150 N, and Student B pulls with 180 N in the opposite direction. What is the net force?
330 N towards Student A
330 N towards Student B
30 N towards Student B
30 N towards Student A
When sketching a free-body diagram for a moving car, why is it crucial to include the friction force?
To show that gravity is acting on the car.
To indicate the car's engine power.
To account for the force opposing motion, which affects the net force.
To prove that the car is accelerating.
What term is used to describe any change in an object's velocity, including a change in speed or direction?
Speed
Velocity
Acceleration
Displacement
Which everyday situation demonstrates a change in an object's speed or direction due to an unbalanced force?
A traffic light hanging motionless on a wire.
A sky diver falling at a constant terminal velocity.
A baseball bat hitting a stationary baseball.
A satellite orbiting Earth at a constant speed.
If a bowling ball is released on a smooth, level floor, what will happen to its motion when no unbalanced forces act on it?
It will immediately stop.
It will gradually increase its speed.
It will continue to roll at a constant velocity.
It will change its direction.
Which statement best explains why a moving train is harder to stop than a moving car, even if they are traveling at the same speed?
The train has a lower coefficient of friction.
The train is moving at a non-uniform velocity.
The train has a greater mass, giving it more inertia to resist the change in motion.
The train experiences greater air resistance.
What property of matter makes an object resist any change in its state of motion?
Gravity
Mass
Force
Inertia
What action is an example of a car undergoing acceleration?
Driving in a straight line at 60 km/h.
Making a sharp turn at a constant speed.
Parking the car and turning off the engine.
Coasting down a hill without touching the gas pedal.
A student kicks a soccer ball that was initially at rest. What is the immediate effect of the kick?
The mass of the ball decreases.
The ball's inertia becomes zero.
The ball's state of motion changes due to an unbalanced force.
The force of gravity on the ball disappears.
What is the total length of the path traveled by an object called?
Distance
Displacement
Speed
Vector
What is defined as the shortest straight-line distance between an object's initial and final positions, including direction?
Distance
Speed
Displacement
Reference Point
A bird flies 10 km north, then 5 km south. What is the total distance the bird has flown?
5 km
15 km
10 km
0 km
In the previous scenario (Question 22), what is the bird's net displacement?
15 km North
5 km North
5 km South
0 km
A jogger runs 3 laps around a 400-meter oval track and finishes at the starting line. What is their total displacement?
1200 meters
400 meters
0 meters
800 meters
3 laps around a 400-meter oval track and finishes at the starting line. What is their total displacement?
1200 meters
400 meters
0 meters
800 meters
Why is a reference point essential when measuring displacement?
It measures the total time elapsed.
It helps determine the average speed.
It establishes the origin to precisely define the initial and final positions and direction.
It is used to calculate the mass of the object.
What term is used to describe how fast an object is moving, regardless of its direction?
Speed
Velocity
Acceleration
Displacement
The quantity that describes the rate of change of position, including both magnitude and direction, is called:
Speed
Distance
Velocity
Time
Which of the following is a vector quantity?
Time
Distance
Velocity
Speed
A bus travels 100 km in 2 hours. What does the resulting value of 50 km/h represent?
Acceleration
Average Speed
Average Velocity
Net Force
A boat travels 120 km East in 3 hours. What is the boat's average velocity?
40 km/h
360 km East
40 km/h West
40 km/h East
Why is velocity a more complete description of motion than speed?
Because velocity is always larger than speed.
Because velocity can be easily graphed.
Because velocity includes both the rate of movement and the direction.
Because speed is only measured in meters per second.
What condition must be met for an object to have uniform velocity?
It must be at rest.
It must be accelerating.
It must move at a constant speed in a straight line.
It must constantly change its direction.
What is represented by the slope (steepness) of a distance-time graph?
Time
Distance
Speed
Acceleration
On a distance-time graph, a horizontal line indicates what state of motion?
The object is accelerating.
The object is moving at a high, constant speed.
The object is at rest (speed is zero).
The object is moving backwards.
A straight line with a positive slope on a distance-time graph represents which type of motion?
Increasing speed
Decreasing speed
Uniform velocity
Non-uniform velocity
If a distance-time graph has a slope of 5 m/s, what is the object's speed? (Applying)
5 meters
5 seconds
5 m/s
5 Newtons
Object A's line on a distance-time graph is steeper than Object B's line. What can be concluded about their motion?
Object B is moving faster.
Object A is moving faster (has a greater speed).
Both objects have the same speed.
Object A travels a longer distance.
What is the transfer of thermal energy between substances due to a temperature difference?
Temperature
Convection
Heat
Conduction
What property is a measure of the average kinetic energy of the particles within a substance?
Heat
Energy
Temperature
Potential Energy
When you touch a metal doorknob on a cold day, it feels colder than a wooden door. Which concept explains this?
The metal has less heat than the wood.
The wood has a higher temperature.
The metal transfers heat away from your hand faster than the wood.
The wood is a better conductor of heat.
A material that allows heat to flow through it easily is called a(n):
Insulator
Conductor
Radiator
Transducer
How does an insulator mainly differ from a conductor in terms of heat transfer?
Insulators are always metals.
Insulators slow down or prevent the easy flow of heat.
Conductors have lower melting points.
Conductors are only used for electrical wires.
You use a thick cloth pot holder to safely lift a hot pot from the stove. What is the cloth's primary role in this scenario?
To increase the heat of the pot.
To act as an insulator to minimize heat transfer to your hand.
To conduct the heat away from the pot faster.
To change the pot's chemical composition.
Which of the following is an example of a good heat insulator?
Copper
Silver
Styrofoam
Aluminum
Why are cooking pots often made of metal while their handles are made of plastic or wood?
Metal is heavier than wood or plastic.
Plastic and wood are easier to clean.
Metal is a good conductor to cook food, while plastic/wood are good insulators to protect the hand.
Metal expands more easily than wood or plastic.
If you wrap an ice pack in a wool blanket, what process are you trying to slow down?
Convection
Conduction of heat from the environment to the ice pack.
Radiation
Electrical current flow.
What method of heat transfer occurs mainly in liquids and gases through the movement of heated fluid currents?
Conduction
Convection
Radiation
Insulation
What method of heat transfer does not require a medium and occurs through electromagnetic waves?
Conduction
Convection
Radiation
Absorption
When the Sun's rays warm your face, what method of heat transfer is primarily at work?
Conduction
Convection
Radiation
Insulation
A boiling pot of water has rising hot water and sinking cooler water, creating a circular motion. This process is a classic example of:
Conduction
Convection
Radiation
Static electricity
