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WorksheetsSemester 1 Review
Total questions: 49
Worksheet time: 4hrs 5mins
Which of the following conclusions can be made about the diagrams shown?
Diagram 1 represents a digital signal because it shows a continuous stream signal.
Diagram 1 represents an analog signal because it is made up of only zeroes and ones.
Diagram 2 represents a digital signal because it has only two distinct values that are being sent.
Diagram 2 represents an analog signal because it shows a changing amplitude.
Which of the following describes the diagrams when the magnets are in different positions? SELECT TWO.
When the magnets are close together, the lines of force between the poles are also close together.
The lines of force between the electromagnet and bar magnet are closest when the magnets are far apart.
The lines of force between the two magnets when they are close are similar to when the magnets are far apart.
When the electromagnet’s south pole and bar magnet’s north pole are close together, there are few lines of force between the magnets.
The lines of force at the electromagnet’s north pole and bar magnet’s south pole change little with the distance between the magnets.
The diagram shows two students making a wave with a coiled spring. Which waves move most like the wave in the coiled spring?
infrared waves
microwaves
sound waves
ultraviolet waves
A car travels at a constant speed of 15 m/s for 2 minutes. The car increases its speed from 15 to 25 m/s during the next minute and then travels at a constant speed of 25 m/s for 2 more minutes. Which of the following graphs best represents the car’s motion during this 5-minute period?
a
b
c
d
The three vehicles shown below are all traveling at a speed of 15 m/s, but only the pickup truck has a changing velocity.
The pickup truck has a changing velocity because the pickup truck —
can accelerate faster than the other two vehicles
is traveling in the opposite direction from the other two vehicles
is traveling on a curve in the road and therefore changing direction
needs a large amount of force to move
Which set of forces will allow the students to demonstrate all three cases of motion?
a
b
c
d
The student blows up the balloon, sets the cart on the tabletop, and lets it go. Air flows out of the balloon and through the straw, but the cart does not move. Which of these explains why the car does not move?
The force of gravity exceeds the other forces acting on the cart.
The forces pushing the cart forward were greater than the force of mass and gravity.
The force on the cart from the air in the balloon and the friction on the tires is balanced.
The cart experiences an unbalanced force from the air in the balloon and the friction on the tires.
A student moves a discharge wand toward the metal sphere of a Van de Graaff generator while it is operating. Which piece of evidence best supports the idea that the discharge wand and metal sphere can exert forces on each other without being in contact?
The discharge wand is connected to the generator by a wire
The distance is reduced from the discharge wand to the metal sphere.
A spark is released when the discharge wand moves toward the metal sphere.
A sound is produced when the generator is turned on and the rubber belt moves.
A student develops an experiment to demonstrate the interaction of forces by using a Van de Graaff generator. Which observation from this experiment best shows evidence of forces interacting?
The insulating base is made of rubber.
The metal sphere on the Van de Graaff generator feels cold.
The discharge wand is connected to the Van de Graaff generator.
The student’s hair rises and stands on end.
The diagram represents two waves produced in the same medium and moving at the same speed. What other property do the waves have in common?
same amplitude
same frequency
same period
same wavelength
A fire truck is blowing its horn as it approaches a bystander at an intersection. According to the Doppler Effect, the bystander will notice that the sound
decreases in frequency
increases in wavelength
increases in pitch
decreases in speed
Which of the following best describes the resulting motion of the engine?
It travels left at a constant speed
It travels left at an increasing speed.
It travels right at a constant speed
It travels right at an increasing speed.
Which of the following observations provides evidence that visible light waves are electromagnetic and not mechanical?
Sunlight can pass through the Earth’s atmosphere.
Sunlight can pass through a clear glass window.
Sunlight can penetrate ocean water to a depth of about 1000 meters.
Sunlight can travel over 93 million miles to reach the earth.
During a fireworks show, a family sees the spray of sparkles from an exploding firework high in the sky and, a moment later, hears the pop. Which of these best explains why the pop and spray do not seem to occur at the same time?
Light and sound travel through air.
Sound travels through a vacuum.
Sound travels slower than light.
Light and sound travel at the same speed.
Which of the following claims is supported by evidence in the table?
Mass does not affect the gravitational force between objects.
As the distance between two masses increases, the gravitational force also increases.
As the mass of the objects decreases, the gravitational force between the objects also decreases.
Distance between objects is the only variable that affects the gravitational force between the objects.
A cart with a mass of 5 kilograms rests on a floor next to a wall, as shown in the diagram below. A person pushes on the cart to the left toward the wall with a force of 100 Newtons. Which of the following explains the effect of this force?
The wall does not push on the cart.
The floor pushes 100 Newtons up on the cart.
The cart pushes 100 Newtons down on the floor.
The wall pushes 100 Newtons to the right on the cart.
The table below shows the speed of sound in different materials. The data in the table provides evidence for which of the following conclusions? SELECT TWO.
Mechanical waves travel faster through liquids than gases.
Mechanical waves travel faster as the density of the material increases.
Mechanical waves travel slower as the density of the material increases.
Mechanical waves travel at the same speed in all mediums.
Mechanical waves travel faster in liquids than in solids.
A student is investigating the strength of electromagnets she created using batteries, wire, and nails. She uses two different-sized nails and varies the number of coils of wire around the nail to determine how many paper clips each configuration can lift. She makes a data table of the results. The student hypothesizes that the number of coils has a cause-and-effect relationship on the strength of the magnetic devices she made. A student is investigating the strength of electromagnets she created using batteries, wire, and nails.
She should give the devices the same number of coils and retest them
She should increase the distance between the devices and the paper clips.
She should repeat the same tests on each device again to collect more data.
She should use just one length of nail and test more of a variety of coil numbers, including 0 coils.
A student is conducting an investigation to show how magnetic forces can act at a distance from an object. What can the student conclude from the data that he gathered in his investigation?
The force is not related to the distance from the object.
The force of the magnet becomes stronger the farther it is from the object.
The force is stronger with less distance between the magnet and the object.
The force of the magnet becomes stronger and then weaker the farther it is from the object.
The diagram shows the behavior of light rays as they encounter a pool of water. Why is the dashed arrow at a different angle from the solid arrow that points to it?
The dashed arrow shows light that was reflected.
The dashed arrow shows light that was refracted.
The dashed arrow shows light from a different source than the other rays.
The dashed arrow shows all the light was completely absorbed by the water.
A student rubs a comb on a cloth. She then holds the comb 30 centimeters above some small pieces of paper on a table, but the paper does not move. When the comb is moved closer to the paper, the paper moves through the air to the comb. Which statement explains why the paper does not move toward the comb when the comb is farther away?
The paper is not attracted to the comb.
The comb and the paper have identical charges.
Only metallic objects can be attracted to each other.
The attractive field from the comb is weaker farther from the comb.
A student built the DC motor model shown.
The motor did not spin as fast as the student wanted. Which of the following would make the rotor spin faster?
Connect the wire from the battery directly to the magnet.
Reverse the electric current coming from the battery.
Use a smaller battery.
Add another magnet to the system.
An airplane travels 1200 miles in 4 hours. What is the average speed of the airplane?
S=D/T
300 miles/hour
4800 miles/hour
333 miles/hour
200 miles/hour
A fiber optic cable is a network cable that contains strands of glass fibers inside an insulated casing. They're designed for long distance, high-performance data networking, and telecommunications.
Compared to wired cables, fiber optic cables provide higher bandwidth and can transmit data over longer distances. Fiber optic cables support much of the world's internet, cable television, and telephone systems.Which of the following best explains how fiber optic cables use waves to communicate?
They use sound waves that travel at the speed of sound.
They use infrared waves that travel at close to the speed of light to encode information.
The use gamma rays because it is necessary to have extremely high energy EM waves in order to travel long distances.
They use a combination of X-rays and visible light to achieve a strong signal.
Investigation #1: First, you measure the force on Object A. In this trial, you use five objects of different mass and keep the acceleration constant.
In Investigation #1, which of the following is the independent variable?
Force (Newtons)
Mass (Kilograms)
Speed (m/s)
Acceleration (m/s2)
In which trial in Investigation #3 will Object B travel the fastest?
1
2
3
4
5
Two objects on the air hockey table are pushed toward each other. The objects are of equal mass. The sizes of the arrows are proportional to the acceleration. What is the most likely outcome of the collision? HINT: Draw a free body diagram for EACH object. Figure out the net force on the object.
Object A will move in the direction shown by Arrow B.
Object B will move in the direction shown by Arrow A.
Objects A and B will move in the direction shown by Arrow A.
Both objects will move in opposite directions to the ones shown by the arrows.
Both objects will move in the same direction as the ones shown by the arrows.
Students explain why they chose a specific material as a liner for the safety helmet. Which of the following best explains the physics behind choosing a specific material as a liner? SELECT TWO.
For any given object, a larger force causes a larger change in motion.
An object’s motion will only change if the total force on it is balanced.
The mass of an object determines its change in motion when subject to a force.
The greater the mass of the object, the smaller the force needed to achieve any change in motion.
The force exerted by one object on a second object always moves the second object in the opposite direction.
