Tech That Sounds Like Science Fiction
Discover real technologies that seem almost imaginary, from smart homes to robot-assisted surgery and reusable rockets.
Preview
Questions with solutions-
1. Escolha a resposta correta.
What is the main purpose of this feature?
Some phones use invisible light to make a 3D map of a person's face before unlocking.
- To brighten photos taken in the dark.
- To check who is using the phone.
- To record a video of the person's expressions.
Think about why a phone might stay locked.
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- To check who is using the phone.
A 3D face map measures the shape of a face, not just a flat picture.
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2. Escolha a resposta correta.
How does energy pass from the pad to the phone?
A phone rests on a wireless charging pad. The pad has a power cable, but no cable connects it to the phone.
- Through a magnetic field.
- Through light from the phone's screen.
- Through sound waves from a speaker.
The phone needs to stay close to the pad.
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- Through a magnetic field.
Loops of wire inside the pad and phone help transfer energy over a short distance.
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3. Escolha a resposta correta.
What does the app let you check?
A furniture app shows your room through the phone's camera and adds a digital couch to the view.
- How comfortable the real couch feels.
- How much weight the real couch can hold.
- How the couch might look in your room.
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- How the couch might look in your room.
Augmented reality adds digital objects to a view of the real world.
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4. Escolha a resposta correta.
What is the main job of this technology?
Two travelers speak different languages. Their earbuds use online translation software to translate their conversation as they talk.
- To teach both travelers a new language instantly.
- To help the travelers understand each other.
- To make both travelers' voices sound identical.
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- To help the travelers understand each other.
Background noise and unclear speech can make live translation less accurate.
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5. Escolha a resposta correta.
Why is the room map useful?
A robot vacuum uses sensors to build a map of the rooms. It uses that map while cleaning.
- To plan a route and avoid cleaning the same spots repeatedly.
- To measure how much charge is left in its battery.
- To measure how much dust is inside its container.
Think about moving around the home.
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- To plan a route and avoid cleaning the same spots repeatedly.
The map can also help the vacuum find its way back to its charging station.
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6. Escolha a resposta correta.
How does the printer build the part?
A workshop sends a digital design to a 3D printer. The printer builds a replacement part from plastic.
- By cutting the shape from one solid block.
- By pouring plastic into a ready-made mold.
- By adding material one layer at a time.
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- By adding material one layer at a time.
Changing the digital design can change the next part without making a new mold.
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7. Escolha a resposta correta.
How could this help in a meeting room?
A glass wall switches from clear to cloudy when an electric current is turned on or off. Light still passes through, but people cannot see clearly through it.
- It could block all daylight so people can watch a video.
- It could give privacy without making the room dark.
- It could give people a clearer view into the room.
Notice that light can still enter.
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- It could give privacy without making the room dark.
This kind of smart glass spreads light in different directions instead of blocking it completely.
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8. Escolha a resposta correta.
What is the drone's main advantage here?
A clinic sends blood samples to a lab by delivery drone. Floodwater has blocked the road between them.
- It can reach the lab without using the blocked road.
- It can test the blood samples during the flight.
- It keeps the samples safe at any temperature.
Think about the journey rather than the lab's work.
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- It can reach the lab without using the blocked road.
Medical deliveries still need safe packaging and suitable storage conditions.
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9. Escolha a resposta correta.
Why do these conditions make it easier for a train to run without a driver?
Some metro trains run without a driver. They follow fixed tracks, and access to those tracks is controlled.
- The train can leave the tracks to avoid delays.
- The train no longer needs any safety monitoring.
- The train faces fewer unexpected situations than a car on public roads.
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- The train faces fewer unexpected situations than a car on public roads.
Road vehicles must also deal with pedestrians and traffic coming from many directions.
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10. Escolha a resposta correta.
Why might a doctor use this camera capsule?
A patient swallows a small capsule with a camera inside. It travels through the digestive system and sends pictures to a recorder.
- To remove damaged tissue without surgery.
- To view parts of the intestine that a larger camera tube cannot easily reach.
- To collect blood samples directly from inside the intestine.
Consider what a camera can do without cutting or collecting anything.
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- To view parts of the intestine that a larger camera tube cannot easily reach.
A camera capsule takes pictures, but it cannot take tissue samples like some other medical tools.
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11. Escolha a resposta correta.
How is this different from simply making sounds louder?
A cochlear implant collects sound with a microphone. It changes sound into electrical signals that stimulate the hearing nerve.
- It sends sound information to the hearing nerve through electrical signals.
- It repairs the ear so it works like an undamaged ear.
- It allows hearing without a working hearing nerve.
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- It sends sound information to the hearing nerve through electrical signals.
People usually need practice to understand the new sound signals from an implant.
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12. Escolha a resposta correta.
How does the person control this artificial hand?
Sensors detect activity in a person's remaining arm muscles. The artificial hand uses those signals to open and close its fingers.
- By giving spoken commands to the fingers.
- By letting the hand read thoughts directly from the brain.
- By tightening muscles in the remaining part of the arm.
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- By tightening muscles in the remaining part of the arm.
The sensors detect muscle activity; a battery supplies the energy that moves the hand.
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13. Escolha a resposta correta.
Who decides how the tools move during this operation?
During robot-assisted surgery, a surgeon sits at the controls. The surgeon's hand movements guide small tools inside the patient's body.
- The robot, without a person's input.
- The surgeon using the controls.
- A program replaying an earlier operation.
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- The surgeon using the controls.
The robot helps make precise movements, but it does not replace the surgeon's decisions.
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14. Escolha a resposta correta.
What should a user understand about this technology?
In some rehabilitation centers, people use powered frames around their legs. Motors help them practice standing and walking with trained staff.
- It provides movement support, not a guaranteed cure.
- It repairs damaged nerves as soon as it turns on.
- It allows safe walking immediately without training or support.
Physical help and medical recovery are not the same thing.
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- It provides movement support, not a guaranteed cure.
A powered exoskeleton supports the body from the outside. Helping someone move does not necessarily fix the cause of their condition.
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15. Escolha a resposta correta.
How does this landing method affect fuel use during launch?
Some rocket boosters return to Earth and land upright using their engines. They must keep some fuel for the return trip so they can land safely and be used again.
- All the fuel can be burned on the way up.
- No fuel is needed until the booster starts returning.
- Some fuel must be saved instead of being used on the way up.
The engines have work to do during both parts of the journey.
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- Some fuel must be saved instead of being used on the way up.
Reusing boosters can save expensive rocket parts, but landing requires fuel, and each booster needs careful checks afterward.