+8 votes
1 lesson
In 4-6 by Petar Mares Guru (6.6k)  

Why water is liquid at room temperature? Water can be liquid in room temperatures. If we put it in freezer, water will freeze, become solid and turn to ice. If we boil water for our tea or coffee we will notice water vapor. If we boil water long enough we will turn all of our liquid water into water vapor. This is a great examples of three states of matter: SOLID , LIQUID and GASEOUS.

Find out more at https://thebeakerlife.com/homework-helper-states-of-matter-a721b953c14c

Image from BEAKERLIFE, find ot more on their website

Water will freeze on 0 ºC, zero degree Celsius and below, and turn from liquid into solid. If we warm it back up it will melt it again to liquid water, and if we warm it even further to 100 ºC it will start boiling and eventually turn into gas. So by increasing the temperature, we can turn water into gas and by decreasing it we can turn it into its solid form or ice.

But this goes not just for water, any substance can have solid, liquid or gaseous state. However some materials like metal are solid already at room temperature and require very high temperatures to be turned into liquid or gas, while some other substance like nitrogen (one of the gases that make air that we breed) require very low temperatures to be turned into liquid (−195.79 ºC) and even lower to be turned into solid.
The reason this happens lies in the structure of each state. In solid state, particles of given substance are connected by strong bonds, thus making it solid. Temperature will make the particles vibrate until they vibrate so hard they finally brake the bonds and the substance changes state from solid to liquid. In liquid state particles will still be connected by loose bonds and if we continue to heat up the given substance even more we will finally brake all the bonds and turn it to gas. Check out this interesting video to learn more.

+4 votes
2 lessons
In 4-6 by Sophia Stenfeldt Rockstar (5k)  

https://selfpublishingadvice.org/seven-tips-to-mind-map-a-novel/

+4 votes
2 lessons
In 7-9 by Magnus Willner Guru (5.3k)  

Decide whether you want to learn basic technique or a specific dance. Find the right video. Warm up. Do the lesson. Practice.

+5 votes
2 lessons
In 7-9 by Juhani Katajamäki Guru (7k)  

Learning coding nowadays is almost what learning to read and write was to people in the past. If you learn the “language of the machines” you will have a much better understanding of the world of the future and even the world you live in right now!

Here are a few excellent websites that teach you coding. They are sorted by the type of coding they are and what their difficulty level is. You should start from the right one according to your level of experience. Scratch programming is one way:

+3 votes
2 lessons
In 4-6 by Sophia Stenfeldt Rockstar (5k)  
Read a lot, and many different types of texts. Try reading a newspaper article with a friend and discuss what you have read. See if you can find a YouTube video about what you have read.
+6 votes
1 lesson
In 7-9 by Gautier Baudry Guru (5.1k)  

Biotechnology is the development of technologies and products based on living systems and organisms. It is at the crossroads of many disciplines such as engineering, genetics, and biochemistry. In its simple form, biotechnologies are about harnessing processes coming from living organisms and using them to make products, for example by using yeasts to make bread or fermentation to make biofuel. With the advancement of genetics and chemistry, biotechnologies are also use to make for example vaccines and medicines. 

+4 votes
4 lessons
In 10-12 by Nelli Numminen Guru (7.9k)  

The ANTIQUITY, also known as the Ancient era (3000 BC to mid 400 CE). Watch these the three videos, starting with Ancient Egypt.

450 skills

636 lessons

22 comments

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