Xiao Yu didn't understand why his sister and father were interested in that jar, and he wanted to go over and stop his sister from touching this terrible thing.

But Murphy thought he was going to make trouble, so he took him into his arms and didn't let him move, and the little guy struggled "mmmmmm

Don't, let go of me, I'm going to save my sister!

"Wow!" Suddenly, his sister's excited cheers came from Xiao Yu's ears, and he stopped his movements in confusion, raised his little head, and looked over.

Of course, Xiao Yu didn't notice the details, he just saw his sister and father looking around the big bottle.

If it's a cartoon, there should be a lot of question marks floating on the little guy's head at this moment: what happened? Why is my sister so excited?

Xiao Yu didn't see it, and at this time, the eggs in the glass bottle were already floating in the somewhat white water. Although it was only suspended in the water, this change was enough to make Xi Xi cry out in surprise.

"Baba, the eggs are floating!" Xixi turned her little head and reported to her father excitedly.

"It's not quite floating yet, you try adding some more salt to it. Yang Yi encouraged Xixi to finish the experiment.

Of course, there is no need to repeat the rest of the experiment, it is nothing more than adding a little more salt to let the eggs surface.

Xixi is more curious, what is the magic that makes the egg float out of the water?

No, after growing up a little, Xixi, who hadn't asked why for a long time, asked her father with great interest today: "Baba, why is this happening?"

This scientific principle is not difficult to explain, but the difficult thing is how to explain it so that Xi Xi can understand it, Xi Xi does not understand what buoyancy is, what is specific gravity or density.

Therefore, Yang Yi pondered for a while, and said first: "Xixi, do you think the water is heavier, or the eggs are heavier?"

Xi Xi tilted her little head and thought about it, but finally chose water.

"Because it's heavy, I'll have a hard time picking it up!" Xixi pointed to the glass bottle containing the water and said seriously, "However, eggs are easy to hold!"

Yang Yi understood his loophole, so he took two identical cups and eggs over and began to demonstrate.

"You see, I put eggs in one cup and water in one cup, but the water I added is about the size of an egg. Yang Yi smiled and handed the two cups to Xixi, "Look at it now, which one is heavier?"

However, this weight difference is still very small, and Xi Xi weighed it, but still can't weigh it.

Yang Yi had no choice but to ask for a small electronic scale used to weigh the dishes in the kitchen, and compared the weight data of the two, and Xixi finally had an answer.

"Now do you think, is the water heavier, or the eggs heavier?" Yang Yi asked with a smile.

"Eggs are heavy!" Xixi reacted quickly, keeping up with her father's speed of thinking.

"Also, do you think the same size of iron is heavier, or is the same size of wood heavier?" Yang Yi said.

Xixi didn't have to do experiments, and she knew how to answer this question, just listened to her crisp response: "The iron is heavier!"

"That's right, under the premise of the same size, iron is heavier than wood, and eggs are heavier than water, and the reason why we call it heavier is that it is denser!" Yang Yi still used iron and wood as an analogy, "It means that more and heavier things are stuffed into its small body." ”

Xi Xi nodded as if she didn't understand.

It's really hard to explain, but Yang Yi feels that if he talks too much, Xixi will also understand more subtly, and he will be able to understand some of the scientific knowledge he said better in the future.

"Well, the reason why this dense egg can sink to the bottom of the water is because it is heavier than water, right?" Yang Yi said with a smile.

This Xixi could understand, and the little girl nodded her head seriously.

"Then we add salt to the water, and the salt will be integrated into the water, so that when we drink the salt water, we will feel the salty taste. Yang Yi made a relatively fresh analogy, "It's like, we are carrying a schoolbag with things, and now we have to unzip it and continue to stuff things inside, so that it will become heavier?"

"That's right!" Xixi continued to nod.

"Then why is that?" Yang Yi smiled and asked Xixi a small question.

"Because, because ......" Xixi still didn't understand, and at this moment, in the face of her father's question, she was confused again.

Murphy listened with relish on the side, and when she saw Xixi saying that she understood for a while, and then opening her mouth for a while and not being able to answer, she couldn't help but say, "Didn't your father say it just now?" It's because it's denser, so it's also heavier!"

Yang Yi smiled and said, "It's okay, we understand now that after adding salt, the salt water will be heavier than the water!"

"I know, I know, because it's salty!" Xixi said aggressively.

"That's right, if you continue to add salt, it will also become heavier!" Yang Yi didn't plan to talk about the more esoteric concept of solubility for the time being, but said, "Because the salt water becomes heavier, when it is heavier than an egg, will the light egg float?"

Xi Xi's eyebrows fluttered when she heard this, and she didn't know if she really understood, so she nodded vigorously anyway.

"Let's take what we found today and see if we can apply it to a wider range of examples!" Yang Yi said with a smile, "For example, do you think that swimming in the seawater, for example, in the summer, when we go to the beach in the coastal area, is it easier to float in the water than swimming in our freshwater swimming pool at home?"

However, although she couldn't compare which of the two swimmers was easier to float, Xixi still understood what her father was going to say.

I saw the little girl grinning and said happily: "I know, I know, because the sea is also salty!

"That's right!" Yang Yi gave a thumbs up in praise.

"Baba, Baba, let's play with other experiments! It's so interesting!" Xixi waited for her father to finish explaining these big truths, and then she couldn't wait to cry out again.

There must be a lot of interesting content in such a big book!

Xi Xi smiled brightly, and Xiao Yu watched from the side. He couldn't understand these truths, but the little guy felt that his sister was smiling so happily, there must be something very funny, and his little eyes were full of envy and expectation.

I really want to play with my sister!

……

The filming of "Residual Sin" has been going on for more than a month, and recently, the crew went south to Yangcheng to shoot some local shots, and Guo Ziyi, who played an important supporting role, also followed.

However, the weather suddenly turned colder, and the news report also said that it was cold air that had not been encountered in ten years, which made Tan Huizhen worry about whether Guo Ziyi, who was in Yangcheng further south, would be frozen.

Isn't there a popular saying on the Internet now: I'm a wolf from the north, but I froze into a husky in the south?

It's a joke, but there's some truth to it!

The cold in Guangdong Province in winter is damp and cold, although the temperature seems to be very high, but the air with high humidity will make this cold like epiphysis, and it seems that the cold air is going to drill into the bones as uncomfortable!

So, when Tan Huizhen called Guo Ziyi, she suddenly asked where Guo Ziyi's agent is now?

"What are you asking Ding Xiang for?" Guo Ziyi became vigilant, "She's in Jiangcheng! She still has schoolwork, and it's impossible to run around with me before graduation." ”

At this moment, Ding Xiang, who was sitting next to Guo Ziyi, straightened his waist nervously and looked at Guo Ziyi precariously.