Subjects
Biology
Chemistry
AP Chemistry
English
AP English Literature
Other
Dec 8, 2025
227
3 pages
Lauren @lauren_b
Physical development from birth to adolescence follows a fascinating and predictable pattern that shapes every aspect of a... Show more
Your physical development in the first few years of life happens at an absolutely mind-blowing pace. From birth to three months, babies go from barely lifting their heads to kicking legs and waving arms with purpose.
The real excitement kicks off between 6-18 months when gross motor skills explode into action. Sitting without support leads to crawling, then cruising along furniture, and finally those magical first steps. By age two, toddlers are running, climbing stairs, and showing off on tricycles.
Meanwhile, fine motor skills develop from basic grasping to incredible precision. The journey from randomly grabbing objects to using a tripod grasp for writing shows how the brain and muscles learn to work together perfectly.
Quick Fact By age 8, children have developed enough coordination to join sports teams and play instruments - their bodies are becoming proper little machines!
This age is when your body becomes a proper tool for expression and achievement. Physical stamina increases dramatically, meaning longer football matches, swimming sessions, and dance classes without getting completely knackered.
Your hands become incredibly skilled during these years. From learning musical instruments to developing lightning-fast texting abilities, fine motor skills reach near-adult levels. Handwriting transforms from wobbly letters to joined, fluent script that actually looks decent.
Sports become much more serious now because your body can handle complex movements like batting, controlled running speeds, and team coordination. This is when many young people discover their athletic talents and passions.
Remember These skills don't just appear overnight - they build on all those earlier years of crawling, scribbling, and playground adventures!
Puberty is basically your body's massive renovation project, and it affects everyone differently. Girls typically start between 10-14 years, whilst boys begin slightly later at 12-16 years, though some African American girls may start as early as 9.
Your body doesn't just grow - it completely transforms. Growth spurts can leave you feeling like you've borrowed someone else's limbs overnight, which is why rest becomes so important (yes, lying in is actually necessary sometimes!).
The physical changes include developing secondary sex characteristics, increased muscle strength and endurance (especially pronounced in boys), and cardiovascular improvements. Your bones grow and strengthen, whilst your entire body composition shifts towards adult proportions.
This transformation affects your mind too. Sexual curiosity emerges naturally, and you might find yourself rebelling against authority - even refusing basic hygiene routines, though deep down you still crave structure and guidance.
Fascinating Fact The average age for girls starting periods dropped from 15 years in 1900 to just 12.5 years by the 1990s, showing how nutrition and environment influence development!
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
5
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Explore Freud's psychodynamic theory of criminality, focusing on the tripartite model of personality: id, ego, and superego. Understand how unconscious drives and early childhood experiences influence behavior and the potential for criminality. This summary provides key insights into the role of the unconscious mind and the implications of a weak superego in criminal behavior.
CriminologyExplore the key concepts of communicable diseases, including the roles of bacteria, viruses, and fungi. Learn about how these pathogens spread, their impact on health, and methods for prevention and treatment. This summary covers essential information for understanding infectious diseases and their transmission.
Food & NutritionExplore comprehensive mind maps detailing biological, individualistic, and learning theories of crime. This resource covers key concepts such as criminal personality traits, the role of genetics and environment, and social learning mechanisms. Ideal for criminology students seeking to understand the complexities of criminal behavior.
CriminologyExplore the psychodynamic theories of personality, focusing on Freud's concepts of the id, ego, and superego, and their implications for criminal behavior. This summary includes key evaluations, the role of maternal deprivation, and insights from Bowlby's study on attachment. Ideal for exam preparation and understanding psychodynamic perspectives in psychology.
CriminologyExplore essential techniques for conducting effective client consultations in beauty treatments. This summary covers the importance of body language, informed consent for minors, and key questioning strategies to assess client needs and preferences. Ideal for beauty professionals seeking to enhance their consultation skills.
OtherExplore key physical and expressive dance skills, including definitions and applications. This summary covers essential concepts such as stamina, coordination, alignment, and musicality, making it a valuable resource for dance students and enthusiasts.
DanceApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Lauren
@lauren_b
Physical development from birth to adolescence follows a fascinating and predictable pattern that shapes every aspect of a young person's life. Understanding these developmental milestoneshelps you recognise what's normal at each stage and appreciate the incredible journey from helpless... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Your physical development in the first few years of life happens at an absolutely mind-blowing pace. From birth to three months, babies go from barely lifting their heads to kicking legs and waving arms with purpose.
The real excitement kicks off between 6-18 months when gross motor skills explode into action. Sitting without support leads to crawling, then cruising along furniture, and finally those magical first steps. By age two, toddlers are running, climbing stairs, and showing off on tricycles.
Meanwhile, fine motor skills develop from basic grasping to incredible precision. The journey from randomly grabbing objects to using a tripod grasp for writing shows how the brain and muscles learn to work together perfectly.
Quick Fact: By age 8, children have developed enough coordination to join sports teams and play instruments - their bodies are becoming proper little machines!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This age is when your body becomes a proper tool for expression and achievement. Physical stamina increases dramatically, meaning longer football matches, swimming sessions, and dance classes without getting completely knackered.
Your hands become incredibly skilled during these years. From learning musical instruments to developing lightning-fast texting abilities, fine motor skills reach near-adult levels. Handwriting transforms from wobbly letters to joined, fluent script that actually looks decent.
Sports become much more serious now because your body can handle complex movements like batting, controlled running speeds, and team coordination. This is when many young people discover their athletic talents and passions.
Remember: These skills don't just appear overnight - they build on all those earlier years of crawling, scribbling, and playground adventures!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Puberty is basically your body's massive renovation project, and it affects everyone differently. Girls typically start between 10-14 years, whilst boys begin slightly later at 12-16 years, though some African American girls may start as early as 9.
Your body doesn't just grow - it completely transforms. Growth spurts can leave you feeling like you've borrowed someone else's limbs overnight, which is why rest becomes so important (yes, lying in is actually necessary sometimes!).
The physical changes include developing secondary sex characteristics, increased muscle strength and endurance (especially pronounced in boys), and cardiovascular improvements. Your bones grow and strengthen, whilst your entire body composition shifts towards adult proportions.
This transformation affects your mind too. Sexual curiosity emerges naturally, and you might find yourself rebelling against authority - even refusing basic hygiene routines, though deep down you still crave structure and guidance.
Fascinating Fact: The average age for girls starting periods dropped from 15 years in 1900 to just 12.5 years by the 1990s, showing how nutrition and environment influence development!
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
5
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Explore Freud's psychodynamic theory of criminality, focusing on the tripartite model of personality: id, ego, and superego. Understand how unconscious drives and early childhood experiences influence behavior and the potential for criminality. This summary provides key insights into the role of the unconscious mind and the implications of a weak superego in criminal behavior.
CriminologyExplore the key concepts of communicable diseases, including the roles of bacteria, viruses, and fungi. Learn about how these pathogens spread, their impact on health, and methods for prevention and treatment. This summary covers essential information for understanding infectious diseases and their transmission.
Food & NutritionExplore comprehensive mind maps detailing biological, individualistic, and learning theories of crime. This resource covers key concepts such as criminal personality traits, the role of genetics and environment, and social learning mechanisms. Ideal for criminology students seeking to understand the complexities of criminal behavior.
CriminologyExplore the psychodynamic theories of personality, focusing on Freud's concepts of the id, ego, and superego, and their implications for criminal behavior. This summary includes key evaluations, the role of maternal deprivation, and insights from Bowlby's study on attachment. Ideal for exam preparation and understanding psychodynamic perspectives in psychology.
CriminologyExplore essential techniques for conducting effective client consultations in beauty treatments. This summary covers the importance of body language, informed consent for minors, and key questioning strategies to assess client needs and preferences. Ideal for beauty professionals seeking to enhance their consultation skills.
OtherExplore key physical and expressive dance skills, including definitions and applications. This summary covers essential concepts such as stamina, coordination, alignment, and musicality, making it a valuable resource for dance students and enthusiasts.
DanceApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
History
Biology