When the time period of direct sunlight passed, the drone flew back with the "eyes" of the audience.

Jiang Yicheng sat up from the ground and waved his hand at the drone's camera: "Hey! Friends, how is it like visiting the blue amber? Now the blue amber has reached the stage of sunset, and it will be evening in about three hours. We're going to start a fire. ”

Barrage: Energy (100/100)

Barrage [Red]: Airborne successful!

Barrage: An orange ancestral craft get√

Barrage: It's coming~It's coming~

"As a reiteration to my new friends, this is my first day on the surface of the Equatorial Lamper, and now I've made my 'Gai'er' and found a source of water and a possible source of food." Jiang Yicheng said into the camera of the drone, "Now the surface temperature here is 36 degrees Celsius, I have to start a fire and filter and boil drinking water - I am so thirsty, you all listen to my voice is a little hoarse." ”

Barrage: I feel sorry for Sister Yicheng......

Barrage [Blue]: Clockwork blue barrage to ease ~

Barrage [Blue]: Water water

Barrage: Don't flood the front [funny]

"Under normal conditions, it is very easy to produce a spark itself, but the main difficulty lies in collecting the materials to make the fire." Jiang Yicheng piled up the rest of the native plant tissue that she had made into a shed, and picked a handful of completely dry ones from the "thatch" on the ground, "Dry and loose fibers are needed to start a fire, and a large amount of combustibles are needed to maintain the long-term burning of the fire." Fortunately, this place is very hot, the aboveground parts of the native plants have relatively little water content, and the dead plant tissues dry quickly, so there are many usable parts. ”

Then she added, "If it's like a tourist getting lost in the wild on an exoplanet, he must have a lighter with him, so just find fuel." But my live channel is simulating an extreme situation with no assistive equipment at all, similar to an unprotected interstellar expedition crash, so I didn't have any lighters, which made it a lot more difficult. ”

"In the absence of ignition devices, in general, extrahabitable planets can adopt the method of frictional heat generation and ignition. According to our determination of habitable planets, planetary atmospheres usually need to be oxidized because life of Earth-origin is strongly dependent on redox reactions (1). Jiang Yicheng said while lowering his head and turning things on the ground with his feet, "What we can easily think of is that it is the safest way to rub dry biological tissues mainly made of carbon skeletons in the oxidized air, so that heat can be generated and fired." ”

"But friction and fire are not optimal here. The large plants I found here were relatively loose and could not be used as cutting boards for drilling wood for fire. If you want to rub it in other ways, it's more difficult to do, and I'm not sure it will work. The atmospheric oxygen content of blue amber is relatively high, up to about 30%, this environment is relatively flammable, and it is completely possible to adopt a more aggressive lifestyle. To survive in the wild, we have to take into account the time cost and opportunity cost. ”

Jiang Yicheng picked up a translucent rose-colored stone with a smooth corner from the ground and put it in front of the drone camera to show the audience: "You see, this is a silica rock - in fact, it is similar to the pebbles on the earth, a kind of quartz." I'm going to use it for fire. ”

Barrage: Pink looks good [Star Eyes]

Barrage: Make a price, I want it!

Barrage: There really is a special auction of ore specimens brought back by interstellar explorers......

Barrage: A stone used by an orange firer, how can you and other mortals buy it [funny]

In addition to drilling wood to make a fire, another common way to start a fire in the field is to make a fire with flint. The so-called "flint" on the earth is a kind of quartzite, and when it is struck with an iron sheet, it produces the piezoelectric effect of quartz (2), causing high-voltage static electricity to appear locally, breaking through the air and producing electric sparks. And the electric spark ignites the iron filings on the iron sheet to become sparks, and the purpose of making a fire can be achieved.

Jiang Yicheng found another piece of silica rock and knocked the two stones against each other until one of them was knocked out into a flake fragment: "Using the piezoelectric effect of quartz to make a fire, the quartzite we use needs to be relatively thin. In this way, the deformation produced by it in the impact will be more obvious, thus increasing the probability of generating electric sparks. ”

Barrage: Take notes .jpg

Barrage: I've learned, I'll run away from home tomorrow and go to the alien world [squint laughs]

Barrage: I thought too much about the front, I tried, and it didn't catch fire for two hours...... Humanoid lighters are not for everyone [laughs and cries]

"In this case, it would have been best if there was something like an iron piece. Iron filings produced by the friction of iron sheets can be ignited by electric sparks to produce sparks. However, if not, electric sparks can be generated simply by the impact between the quartz sheets, and the same is true for igniting velvet with electric sparks. Jiang Yicheng picked up the flaming quartz film she had made and put it in front of the camera to show it.

Then she sat down on the ground and tapped the hay fleece with a quartz flake.

The feeling of the first knock is definitely not right, and in order to produce a large enough voltage difference, it is necessary to find a suitable angle. Jiang Yicheng changed several angles, and then finally was able to produce a faint electric spark when he struck.

Barrage: Got it! See!

Barrage: Awesome my orange!

Barrage: Ruthless Iron Hand.jpg

Barrage: It's no secret that an orange is a thunderbolt creature [funny]

But there is still a bit of a distance from generating electric sparks to igniting velvet made of "thatch". Jiang Yicheng repeated the tapping a few times, and after being able to produce an electric spark steadily, he put down the quartz sheet first.

"I need to be ready before I actually light the fire." Jiang Yicheng said, "After the creation of Mars, in order to be able to really ignite these grasses, it is necessary to increase the oxygen flow around Mars, that is, to blow at it. But now our helmets are sealed, so it's going to be like this first-"

She flipped the lid on the front of the helmet open to the camera, adjusted the position of the straw inside, and bit the port of the straw in her mouth.

"This straw is the feeding tube of the helmet of the protective suit, and it has a sealing flap inside, which is sealed when there is no external force to squeeze it (3)." Jiang Yicheng bit the straw and introduced, "All qualified professional protective helmets will have this device...... Gently bite the sealing flap of the straw with your teeth, allowing the airflow to pass through the straw as you blow it up. In the same way, when the time comes, drinking and eating will also pass through this habit. ”

"Then I'm ready to blow, and now is the moment to witness the miracle-" Jiang Yicheng picked up the quartz sheet again and tapped it the velvet on the ground.

Twenty-seven light-years away, the audience stared at the screen with bated breath.

As a result - nothing happened.

Jiang Yicheng's "great" percussion produced electric sparks visible to the naked eye, but it was not lit.

Barrage: Overturned overturned [funny]

Barrage [Yellow]: Famous Star Explorer One Orange Overturning Scene [Funny]

Barrage: Witness the moment of overturning [funny]

Barrage: Isn't it normal that the fire may fail, and joke about the quality of others???

Barrage: The front one, it's just a joke [Khan]

"Uh...... This is normal. Jiang Yicheng is also used to it, the success rate of ignition in the original way is very low, and failure is normal, "Try a few more times, and you can always succeed." That's the way it is to make a fire, as long as the method works, you can try again after failing once - be careful to use the method that works, it will definitely not work in the opposite direction. ”

She adjusted her sitting position so that she was comfortable on the floor in a standard cross-legged position, and then took the quartz piece and began to repeat the striking motion.

Finally, after repeating it probably more than twenty times, a bright electric spark from an accidental one ignited the hay down below, creating a looming spark.

Jiang Yicheng immediately picked up the hay velvet and blew it through a straw. Smoke gradually came out of the hay down, and then the hay down suddenly began to burn, Jiang Yicheng hurriedly put the light hay down into the prepared pyre, and let the flame ignite the dry native plant leaf stalks.

Jiang Yicheng lit a fire on the surface of "Blue Amber", and at this time the four elements of her survival were complete, at least in form.

Barrage: Congratulations!

Barrage [Blue]: Remember this historic moment, the flames of civilization appeared on the surface of the habitable planet Blue Amber!

Barrage: Blue Amber and Orange Civilization is officially born!

Barrage: Building the Blue Amber Civilization (1/1)

Barrage: One Orange, the Communicator of Civilization [Funny]

Barrage: It's getting dark, sister, boil water~

"Now I'm going to make a fire." Jiang Yicheng got up from the ground and straightened her fire with a leaf pole, "Because the oxygen content of the blue amber atmosphere is relatively high, you must be more careful when maintaining the fire." Be sure to empty the area around the fire to avoid danger of burning the plants around the camp. ”

————————————

Exegesis:

(1) The abundance of oxygen in the universe is 0.09%, ranking third, so there is a high probability of oxygen element in the formation of an oxidized atmosphere. However, because oxygen is prone to chemical reactions, the oxygen content of planetary atmospheres in an inanimate state is usually very low and the overall oxygen content is reducible, and the high oxygen content of the earth's atmosphere is the result of life activities.

(2) Piezoelectric effect: the charge in the crystal lattice of the crystal with asymmetrical center moves when it is pressurized, resulting in electrical displacement, resulting in the phenomenon of voltage difference between the two sides of the crystal on the macroscopic scale. Quartzite is compressed to produce electric sparks, which is equivalent to an energy conversion process, and most of the ignition devices currently used are designed based on the principle of piezoelectric effect.

(3) The sealing effect of such devices is limited to the situation where the difference between internal and external air pressure is not obvious, and the purpose is to isolate the internal and external air; Obviously it cannot be used for sealing between vacuum and non-vacuum.