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WorksheetsPage 1
Total questions: 51
Worksheet time: 26mins
What type of force is applied when you kick a stationary soccer ball?
Magnetic force
Gravity
Electrical force
A contact force
Ruel tested how contact forces move objects. He pushed a box from behind—it went forward. He pushed it from the right—it moved left. He pulled it with a spring scale—it came to him. Each time, the box moved in the same direction as the force. Ruel then pushed the box straight to its mark, proving force direction controls motion direction. Based on Ruel's tests, what general rule can be concluded about contact forces?
Only pulling forces cause motion in the force's direction
Objects always move in the opposite direction of the force
Motion occurs in the same direction as the applied contact force
Contact forces have no predictable effect on motion
Ruel needs to move a large, round barrel to the corner of the warehouse. Applying what he learned, which method should he use to make it roll directly northeast?
Push it from the southwest side toward the northeast
Push it from the northeast side toward the southwest
Pull it from the northwest side
Lift it and carry it
Evaluate the statement: "Ruel's use of a spring scale in the third test was unnecessary because he already proved his point with pushes." Which choice best evaluates this claim?
The statement is correct; spring scales only measure an object's weight
The statement is wrong, but only for moving very heavy objects
The statement is wrong; testing pulls gives stronger proof of the rule
The statement is correct; using only pushes is enough to show the rule
To test how different surfaces affect friction, which variable should you change in your experiment?
Changing the time of day
Changing the type of surface
Changing the person in the test
Changing the object's weight
Which action is most likely to reduce friction when sliding a box across a floor?
Scatter sand under the box
Press down harder while pushing
Use a rough rubber mat under the box
Add wheels to the bottom of the box
A student pushes a cart east with a constant force. What is the expected direction of the cart’s motion while being pushed?
South
West
East
North
During an investigation, you want to test the effect of push strength on distance traveled. Which variable should stay the same to keep the test fair?
Starting distance
Amount of force
Type of surface
Direction of push
Ruel places tape marks on the floor to track motion. Why does marking a straight path help his experiment on force direction?
It reduces friction between the floor and box
It keeps the push speed constant for every trial
It shows whether motion follows the planned direction
It measures the weight of the box accurately
A magnet pulls a metal ball toward it. What kind of force is this, and how does the ball move?
Gravity; ball moves upward
Electrical force; ball moves sideways
Magnetic force; ball moves toward
Contact force; ball moves away
A student plans to test friction on wet and dry versions of the same tile. What is the main question their experiment can answer?
Does moisture change the amount of friction?
Is water itself a sticky substance?
How long does it take the water to dry on tile?
Which type of tile is more expensive?
A ball rolls down ramps covered in different materials and then rolls on the floor. It rolls farthest after the smooth plastic ramp. Why?
There was more friction on the plastic, which pushed it farther forward.
The less friction on the plastic keeps the ball more speed.
The plastic ramp was steeper and creates more friction.
The ball was bigger on the plastic ramp.
You suspect that weight also affects friction. To fairly test only how surfaces affect friction, you must:
Use the same weight on different surface you test.
Ignore weight completely.
Use different weights on different surfaces.
Change both weight and surface at the same time.
In machinery, why is oil often used between moving metal parts?
To increase the machine’s speed
To reduce friction and wear
To make them heavier
To make them look shiny
If you want to make a drawer slide more smoothly, what should you do and why?
Make the tracks rougher so it grips better.
Rub sandpaper in the tracks to increase friction.
Add weight to the drawer to push it down harder.
Apply wax or lubricant to reduce friction.
To demonstrate how friction produces heat in a classroom activity, a teacher has students rub their palms together, then rub two pieces of coarse sandpaper together. Which will likely produce more noticeable heat, and why?
Both will produce the same amount of heat.
Neither will produce heat; only machines can do that.
Rubbing palms, because skin sensitivity detects heat better.
Rubbing sandpaper, because rough surface create greater friction.
Why do some running tracks have a rough, textured surface while gym basketball courts are often smooth and polished?
Smooth surfaces are more expensive, so they are used indoors.
Tracks need high grip; courts need low grip for slides.
Texture has no relation to friction.
For aesthetic reasons only.
A mountain biker must choose between knobby tires (All-terrain tires) and smooth tires. Which is the better overall choice for steep, rocky trails?
Smooth tires; less friction means less heat on the rims.
It doesn't matter; both are designed for mountains.
Knobby tires offer better grip and safer control.
Smooth tires; they go faster always.
Your school is building a wheelchair ramp. They can choose rough concrete or smooth tile. Which is the better choice so no one slips?
Rough concrete provides safer grip over time.
Smooth tile—wheelchairs go faster on it.
It doesn’t matter; both are slippery when wet.
Smooth tile—it’s easier to clean.
When you throw a ball into the air, it follows a curved path back down. What force causes this predictable curve?
Air friction slowing the ball's motion
The strength of your initial throw
Magnetic forces acting on the ball
Gravity pulling it down as it moves
For a science project, you need to visually show how gravity affects objects of different masses. Which setup would best demonstrate this?
Rolling marbles down slopes of different angles
Dropping a feather and a hammer in a vacuum tube
Spinning two objects on strings to see which flies out farther
Dropping a basketball and tennis ball from same height together
In a classroom demonstration, a teacher drops a textbook and a single sheet of paper from the same height. The textbook hits the ground first. A student claims this proves heavier objects fall faster. How should the teacher best respond?
Agree, because the textbook is heavier
Claim gravity pulls harder on textbooks
Explain air resistance slowed the paper down
Say the textbook fell first because it was dropped first
In evaluating the statement, "Heavier objects fall faster," which real-world observation provides the strongest contradiction?
A bowling ball and metal ball landing together
A feather floats down slowly on a windy day
A brick sinking faster than a leaf in water
A parachute makes a person fall slower
If you drop a rock and a piece of paper at the same time in a room with no air, what will happen?
The rock will fall upward instead
Both will fall at the same speed
The rock will fall more slowly
The paper will float in the air
You are explaining why a basketball follows a curved path when passed across the court. Which force is primarily responsible for this curve?
The strength of the thrower’s arm
The spinning motion of the ball
Gravity pulling the ball downward
Air resistance pushing on the ball
What common effect can static electricity cause?
Producing loud cracking noises
Causing objects to melt down
Making your hair stand up
Making objects invisible
Why does rubbing a balloon on your hair allow it to stick to a wall afterward?
The balloon gains a static charge that attracts it to the wall
The balloon becomes sticky from your hair oil
Your hair leaves glue-like residue on the balloon
The wall becomes temporarily magnetized
You have a positively charged glass rod. An unknown balloon is repelled by it. What can you conclude about the balloon's charge?
The balloon is positively charged
The balloon is negatively charged
The balloon has no charge
The balloon is neutral
A student says, "Air resistance is the same for all objects." Which simple test could best challenge this claim?
Spin a coin and a pencil on a table
Weigh a book and a ball on a scale
Roll two marbles down the same ramp
Drop a crumpled and flat paper together
If a charged balloon attracts small paper bits, but after a few minutes it no longer attracts them, what is the most likely explanation?
The charge on the balloon dissipated into the air.
The paper bits developed their own strong charge.
The balloon’s temperature changed.
The paper bits became too heavy.
A student claims: “A balloon rubbed on hair will always stick to any wall because static electricity works the same on all surfaces.” How should this claim be evaluated?
False; balloons only sticks to metal surfaces.
False; insulation and humidity affect the outcome.
True; but only for blue painted walls.
True; static attraction works on every surface.
To help explain static electricity to visually impaired students, you want to create a tactile demonstration. Which method would work best?
Giving them differently textured fabrics to touch and sort.
Letting them feel charged balloon gently pull their arm hair.
Having them listen to a recording about electric charges.
Having them smell charged versus uncharged balloons.
What is the purpose of a switch in a circuit?
To open/close the circuit
To hold the bulb in place
To power the battery
To make the wires longer
A student draws a circuit diagram with a battery, a closed switch, and a bulb, but the bulb is shown before the switch in the loop. Will the bulb light?
No, the bulb must touch the battery directly.
No, the switch must come before the bulb.
Yes, the closed loop and switch allow flow.
Yes, but only if the wires are colored red.
You want to create a circuit where a bulb lights and a buzzer sounds at the same time using one battery and one switch. What is the simplest correct wiring method?
Connect the switch only to the buzzer.
Connect the bulb and buzzer in one series loop.
Connect the buzzer across the bulb's terminals.
Connect the bulb and buzzer in separate loops from the battery.
Why is it important to connect the metal tip of a bulb to the metal part of a battery holder or wire in a circuit assembly?
Metal is colorful and makes the assembled circuit easier to see.
Metal is an insulator that protects the user from electric shock.
Metal provides the necessary chemical energy for the reaction.
Metal is a conductor and completes the electrical path for current.
“A buzzer will not work in a circuit that previously had a bulb because it uses electricity differently." Evaluate this claim.
False; a bulb circuit cannot ever be altered to work with a buzzer.
False; if the circuit is complete and the battery has sufficient voltage, the buzzer will work.
True; buzzers require AC current, while bulbs work only on DC.
True; a buzzer has much higher resistance and will always blow the simple circuit.
For a science project, you must design a circuit that visually demonstrates when a battery is drained. The best creation would be:
A circuit with no switch, so that the circuit is always left on.
A circuit that uses only a buzzer because buzzers do not drain batteries.
A circuit with a bulb that gets dimmer as the battery drains.
A circuit that uses two batteries so it never drains.
What happens to a simple electromagnet’s magnetism when the power source is disconnected?
It reverses its polarity
It loses its magnetism
It becomes permanently magnetic
It gets stronger suddenly
Which factor can increase the magnetic strength of a simple electromagnet?
Increasing the number of coils
Decreasing the number of coils
Using a thinner core
Using a shorter wire
In the statement, what property of the electromagnet is described as "temporary"?
Its attraction to metal only while electric current flows
Its unchanging physical shape and overall form
Its fixed chemical composition and makeup
Its measurable electrical resistance value
In the scenario, they recorded that the electromagnet’s magnetism is "temporary and controllable." What does this specifically mean?
The magnetism can be turned on and off by completing or breaking the circuit
The electromagnet becomes weaker each time it is used
The electromagnet can only be used once before breaking
The magnetism slowly fades over time even when the battery is connected
If they had used the same number of batteries and coils but replaced the iron nail with a steel bolt of the same size, how would the results MOST LIKELY differ and why?
It would work permanently because steel is always magnetic
It would not work at all because steel cannot be magnetized temporarily
It would still work because steel is also ferromagnetic
It would reverse polarity only because steel flips magnetism naturally
Which component is necessary for building the simple electromagnet described: wire, power source, and what kind of core?
A glass core to reduce resistance
An iron or steel core for magnetism
A wooden core to prevent heat
A plastic core for safety
What happens to an electromagnet’s poles when the battery connections are swapped?
They disappear completely
They stay the same always
They reverse due to current direction change
They move to the ends of the wire
Why did Leo and his grandfather build an electromagnet with a nail, wire, and battery?
To measure resistance of different wires
To permanently magnetize the nail for a sculpture
To retrieve a key stuck under a metal grate
To test how hot the battery becomes
Which observation best shows that an electromagnet’s strength increases with more power or coils?
The wire turns a darker color
The battery feels lighter in hand
It lifts heavier metal objects
It makes a louder buzzing sound
Which statement describes a circuit condition needed for a simple electromagnet to work?
The circuit must use alternating current only
The circuit must have a light bulb only
The circuit must be closed with current flowing
The circuit must be open with current stopped
Create a safety guide for students building electromagnets based on the risks implied in the scenario (e.g., heat, short circuits, battery drain). Which rule would be MOST important?
Never leave the circuit connected beyond 30 seconds to prevent overheating.
Only operate your electromagnet in an outdoor environment.
Always wrap the wire neatly in colorful and decorative tape.
Always select and use the thickest iron nail available.
You are asked to design a new experiment to test how wire thickness relates to the electromagnet's properties. Which procedure would best create valid and comparable data?
Change the battery type each time a different wire thickness is tested.
Test a single wire thickness and write a narrative about the rest.
Test wires of different thicknesses while keeping all other variables the same.
Test wires of different colors but with an identical thickness and length.
Propose a creative, real-world use for an electromagnet that specifically combines its properties of being temporary and having variable strength.
A permanent decorative magnet for holding notes on a refrigerator.
A theoretical battery designed with an infinite and endless power supply.
A magnetic navigation compass that consistently points toward true north.
A crane in a junkyard that lifts and then releases scrap metal on demand.
