The three light clusters fell, condensed into three people, and everyone immediately greeted them.

"Hey, Bobo, it's morning!"

"Bobo, always come first~"

"He's going to get the mission first! Bobo, what's today's event? ”

"Babe, projection mission."

The light curtain unfolds, and the mission is revealed:

Activity 4: "Learning to Use Tools".

Activities:

Review: What did you learn from the last event?

1. Observe the object with a magnifying glass.

2. Observe and record at the same time.

3. Summarize the use of magnifying glass and precautions.

While the friends watched the activity tasks, Ding Xuecheng clicked on the character attributes to view.

Character: Bobo (Ding Xuecheng)

Credits: 94,208

Age: 7 years old

Height: 106cm

Weight: 18.5kg

Power: 1.9

Constitution: 2.8

Endurance: 2.4

Dexterity: 2.4

Will: 2.5

Spirit: 2.8

Charisma: 1.6

Lucky: 1.5

Condition: Thin, short, healthy

Skill: Super Taste (Unenabled)

Task: Received

Main quest 1: Life experience.

Reward: One all-attribute enhancement solution.

Side quest 1: Get to know nature.

Reward: Unknown.

"The effect of eating meat is really strong, the height has grown by 1.5 centimeters at once, the first four attributes have grown by 0.3, and the last four attributes have grown by 0.2. This challenge mode is really profitable, and I will challenge it once every time I want to do it in the future! ”

"Bobo-san, you can only challenge once a week, please grasp it reasonably."

"It's only once a week, so I have to study the curriculum carefully and choose the right activities to challenge."

"Guys, you get it, right? Today's task is relatively simple, we have already observed the raw stone flower with a magnifying glass before, and we also know how to record the observations, so this mission will not take long. ”

"Well, that's right."

"Got it, let's go!"

"I finished the mission earlier and went back, I still have unfinished the scientific data."

"Beibei, send us over."

The four figures were solid, and Ding Xuecheng and Sanhe came to the stone road of a farm.

"Beibei, can you still use the magnifying glass you rented last time?"

"Last time it was meant to be free!"

"Oh, remember, this time it's still renting once, and if you use it again in the future, do you still need points?"

"Rent once for 1 point." Beibei's tone was a little weak.

"Beibei, don't make that pitiful look, I earned so many points today, give you 100 points, help me!"

"Huh? Send me 100 points! Okay, this time it's free to rent a magnifying glass! ”

"Hmm~ You're so realistic!"

"Cars need to be refueled to run long distances; When a horse is saddled, it can run happily! ”

"You know a lot, do a good job, and there will be rewards in the future."

"I will do a good job and think about you at any time!"

Ding Xuecheng clapped his hands and shouted: "The activity has begun, let's answer the first question first, and then start to observe, and in the observation activity, cultivate the habit of cooperating with others." Binbin, give you a magnifying glass! ”

"Beibei, let me answer what I learned in the last activity: know our sensory organs - eyes, ears, nose, tongue, skin, try to use various sensory organs to sense various objects around us, and then comprehensively use each sensory organ to observe and understand more external morphological characteristics of things."

"If you answer correctly, you will be rewarded with 10 points."

After Ding Xuecheng finished answering the question, he turned his head and found Binbin squatting on the ground looking at something with a magnifying glass, and the two little girls were still chattering on the side.

"Binbin, what are you looking at with a magnifying glass?"

"Snails."

"What are you discussing?"

"We're talking about whether snails have eyes and mouths."

"I've seen this information, snails have eyes and mouths."

"Ah, where is it? We haven't found it for so long with the naked eye, and Binbin is looking for it with a magnifying glass! ”

"The snail has a more fragile, low-conical shell; The head has two pairs of antennae, and the last pair of longer antennae has eyes at the apex; The ventral surface has flat, wide gastropods that move slowly, secrete mucus under the feet, reduce friction to help walking, and mucus can also prevent ants and other general insects. Snails generally live in relatively humid places, hiding from direct sunlight in the vegetation. Snails that live in cold regions hibernate and species that live in the tropics also dormant during the dry season, and the mucus secreted during dormancy forms a dry membrane to close the shell opening, and hides the whole body in the shell, and when the temperature and humidity are right, they will come out to move. ”

"Snails are the animals with the most teeth in the world. Although its mouth is about the size of a needle, it has more than 26,000 teeth. A little down in the middle of the snail's small antennae is its mouth, which has a jagged tongue that scientists call a 'toothed tongue'. ”

"There really is a mouth, and so many teeth! Ah, eyes on antennae! Binbin, look for it! You read it and show us~"

Although Ding Xuecheng checked the information and learned that snails have strange mouths and eyes, he had never seen them, so the three of them were impatient to wait for the magnifying glass.

"There really are eyes, on the long antennae at the back; There's a small hole in the middle of the short antennae, is that its mouth? I think I really have teeth! Bin Bin exclaimed.

"Quick, quick, show me!" The three people next to him shouted in unison.

So, the four of them took magnifying glasses and watched the snail for a long time.

"Yeon-yeon, you record the observations we discussed, and I'll answer the questions accordingly."

"yes, okay."

"Bebe, show the active task."

The light curtain is unfolded, and the question is revealed: [Activity 1] What is the difference between observing with a magnifying glass and observing with the naked eye?

"When we look at relatively small objects, we may not be able to see clearly with the naked eye, so we can use tools like a magnifying glass to help us observe. A magnifying glass magnifies details and allows you to see objects larger and clearer. ”

"If you answer correctly, you will be rewarded with 10 points."

"Let's go find the flowers and observe."

"How many flowers are there over there, what are those two plants that have red flowers?" Kiki ran to the flowers as she screamed, and everyone followed.

"This is a gerbera, that's a hibiscus flower." Ding Xuecheng did his homework in advance and replied without hesitation.

Seeing that there was no room to play, Binbin stepped forward to observe with a magnifying glass. Because the magnifying glass was raised too high, and the mirror was facing the sun, one of the petals of the gerbera was burned into a hole the size of a pinhole.

Kiki got closer, was startled, and screamed, "Wow, that's amazing, what's wrong?" ”

Ding Xuecheng happened to have this experience, and immediately answered: "In addition to the main function of the magnifying glass, it magnifies the image of the object; There is also a secondary function, concentrating light, which has the effect of focusing on fire. ”

"Can you still make a fire?"

"Yes, when surviving in the wild, in the absence of modern fire-making equipment, you can only drill wood to make fire or concentrate light to make fire. A magnifying glass is one of them, and water can also be used to make a fire by putting water in a plastic bottle or bag and making it into a shape with a thick middle and thin edges. ”

"Really, it's so practical, if we encounter that situation, we will follow you closely, have a fire to keep warm, and eat cooked food, well, and fend off the beasts!" The two girls' eyes were shining with stars, and they seemed to be fascinated.

Ding Xuecheng said secretly: "I was almost scared to pee!" You still yearn for it, it's unreasonable! ”

Binbin finally found an opportunity to speak, and also joined the discussion: "The magnifying glass is composed of a mirror handle and a lens, the lens is a convex lens, the middle is thick and the edge is thin, the common materials for making lenses are glass, what he just said is water lenses, similar ice lenses, and a small number of gemstones, crystals, etc. The combination of two magnifying glasses can increase the magnification of an object, and telescopes and microscopes are made on this principle. ”

"You boys know a lot!"

"Yanyan, you have a high level of painting, first observe with the naked eye, and draw the gerbera flowers."

"Well, okay. However, I can only draw the appearance of the flower, such as the corolla, calyx, receptacle, stamen, etc., and I can't draw the details of the stamen, the pollen, and the lines on the petals. ”

"Add a magnifying image where the drawing is not clear, you look at it with a magnifying glass, and then draw that part of the detail in the magnifying image. We look at the comparison and add as we go. ”

"Yes, yes! It's a good idea! ”

So, the three of them observed and described and supplemented, and Yanyan drew the figure of the gerbera in a while, and also drew a few enlarged pictures of petals and stamens next to it, which was very clear and detailed.

Then I went to look at the hibiscus flowers and drew the hibiscus flowers in the same way.

Each flower is also accompanied by a caption next to the figure.

"Bebe, show the active task."

The light curtain is unfolded, and the problem is revealed: [Activity 2] Try to observe an object with a magnifying glass, and record while observing.

Gerbera: terminal inflorescence with large flowers, 6-10 cm in diameter when tongue lobes unfolded; bracts bell-shaped, bracts 2-layered, pubescent on the back, oblong-lanceolate on the inner layer, apex caudally pointed; Receptacle flattened, bare, honeycomb; The outer female flowers are 2 layers, the outer corolla is tongue-shaped, the tongue is pale red to purplish-red, or white and yellow, oblong. The flowers are rich in colors, including red, white, yellow, orange, purple, etc.

Hibiscus flowers: large flowers, solitary leaf axils, diameter 5~8 cm, single or double petals, white, pink, purple and other colors, sometimes red or purple at the base of the petals. The flowers are irregularly shaped, obtuse at the base, short stalks, and the bracts are rounded. calyx grayish-green, lobes retracted or recoiled; There are fine hairs on the outside of the flower stalk, bracts, and calyx; petals 10, wrinkled, pale yellow or pale purplish-blue, obovate, densely pubescent at base; The stamens are synthesized to form a stamen, and the anthers are numerous, purple-black. The breath is slight and the taste is light.

"The answer is basically complete, the picture is clear, and the observation of snails, gerberas, hibiscus flowers and drawings will each reward 20 points, for a total of 80 points."

After the observation, Ding Xuecheng beckoned everyone to come over: "Let's discuss the use of magnifying glasses and precautions, and complete the task of this activity after answering." Let's start by discussing how to use a magnifying glass. ”

Kiki: "The first thing to do is to keep the object parallel to the mirror. ”

Yeon-yeon: "Then adjust the distance between the magnifying glass and the object until you know that the object you want to see is very clear." ”

Ding Xuecheng: "That's what I did when I observed snails and flowers just now, so that I could see the subtle structure of the flowers through a magnifying glass. With the naked eye, it is difficult to observe smaller objects in life; With a magnifying glass, you can see the details of the object and observe it in more detail. ”

"Using a magnifying glass to observe the details of an object, we should try to observe from multiple angles and in multiple ways around a subject of observation." Bin Bin added a point, and everyone nodded.

The following is a discussion of the considerations for using a magnifying glass. Let me start with one point: it is forbidden to look at the sun with a magnifying glass to avoid burning your eyes. ”

"Don't put it in the bright light against your skin, it will burn your body."

"Don't expose yourself to flammable products in bright light, as this can cause a fire."

"Don't collide with hard objects such as steel, generally the magnifying glass is glass, which is easy to break, so take care of the magnifying glass."

"Okay, Babe, projection activity mission."

The light curtain is unfolded and the problem is revealed: [Activity 3] Summarize the use of the magnifying glass and precautions.

"How to use a magnifying glass: first of all, keep the object parallel to the mirror; Then adjust the distance between the magnifying glass and the object until you know that the object you want to see is clear. ”

"Precautions for using a magnifying glass: do not point to your own skin and flammable materials in bright light; It is forbidden to look at the sun with a magnifying glass; Do not collide with hard objects such as steel to avoid breaking, and take care of the magnifying glass. ”

"Answer exactly right, 20 points are awarded. This event is complete and ready to return. ”