Anything which occupies space and has mass is called matter. Matter can be divided in two categories. (i) Pure Substance: It consists of single types of particles which are same in their chemical nature. (ii) Mixtures: Mixture consists of two or more particles.
Where can I get best notes for class 9?
INNOVATIVE GYAN provides the best All Subject Class 9 Notes in Hindi And English free for students to refer and score well in the class 9 CBSE Board exams.
What is force notes 9th?
→ Force: It is the force that enables us to do any work. To do anything, either we pull or push the object. Therefore, pull or push is called force. Example, to open a door, either we push or pull it. A drawer is pulled to open and pushed to close.
How do we fall ill notes?
Immediate cause: The organisms that enter our body and causes disease is called immediate cause. For example, virus, bacteria, protozoa etc. surroundings, contaminated food, improper nourishment, poverty, poor standard of living etc. Diseases may be due to infectious and non-infectious causes.
Which is the best website for notes?
- Microsoft OneNote for a free note-taking app.
- Evernote for the ultimate digital notebook.
- Apple Notes for Apple users.
- Google Keep for Google power users.
- Notion for collaboration.
- Obsidian for power note-takers.
Is Class 9 English easy?
Class 9th English is not so difficult if understood thoroughly.
What is SI unit of force?
The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg. The second, unit of time — symbol s.
What is inertia SI unit?
Moment of inertia is defined as the tendency of an object to remain in a state of rest or of a constant rotational velocity. Greater the moment of inertia, more torque is required to change this state. Torque in rotational motion plays the same role as force in linear motion. Its SI unit is kg. metre2.
What is rest inertia?
Inertia of rest (static inertia) is the fundamental property possessed by a body to oppose any change in its state of rest. Or in other words, the body does not want to change its state of rest, but wants to continue its state of rest is called inertia of rest (static inertia).
Why do we fall ill Class 9 notes PPT?
i) Through air :- Common cod, Tuberculosis, Pneumonia etc. ii) Through water :- Cholera, Amoebic dysentry etc. iii) Through vectors :- Mosquitoes :- Malaria, Dengue, Yellow fever etc. Flies :- Typhoid, Tuberculosis, Diarrhoea, Dysentry etc.
What does disease look like?
Note: Disease can be viewed by examining symptoms of disease. The common symptoms of diseases include headache, fever, vomiting etc. Like jaundice can be examined by pale skin. Diarrhoea can be examined by loose motions.
What are the causes of disease?
- Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis.
- Viruses. Even smaller than bacteria, viruses cause a multitude of diseases ranging from the common cold to AIDS.
What is a true solution?
A true solution is a homogeneous mixture of two or more substances in which the particle size of the material dissolved (solute) in the solvent is less than 10-9 m or 1 nm. True solution is exemplified by a simple sugar solution in water.
What is a homogeneous mixture?
A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. The salt water described above is homogeneous because the dissolved salt is evenly distributed throughout the entire salt water sample.
What is a mixture Class 9?
If two or more substances (elements or compounds) are mixed together in any proportion, and they do not undergo any chemical change but retain their properties, the resulting substance is called mixture.
Can I make notes on my phone?
You can write or say notes in Keep and find them from any device. Learn how to create and edit notes using your Google Assistant.
How do I organize my notes?
- Sort Notes into Folders/Notebooks.
- Create a Table of Contents.
- Choose a Notetaking Method.
- Create a Consistent Notetaking Process.
- Summarize Your Notes.
- Consider Using a Notetaking App.
- Make Your Notes Easier to Search.
- Utilize Flashcards.
Is the free note app good?
Both GoodNotes and Notability offer a free version, but they serve different purposes. While you can use the free version of GoodNotes for as long as you want, it’s essentially just a free trial that never expires, because you only get three notebooks to use. To fully take advantage of this app, you’ll need to buy it.
How can I write a story in class 9?
Basically, developing and writing a good story needs the art of narration. You have to narrate the incidents in a sequential order leading to the final conclusion. Students should follow the basic theme as expounded by the input or by the introductory lines. They are not supposed to invent new and different themes.
How do I write a letter of Class 9?
POINTS TO REMEMBER : Use proper layout according to the type of the letter. Write the address, date, salutation and subscription near the left hand side margin. Indenting and punctuation mark may be avoided. Leave space after a Para or important part of layout.
How do you write a class 9 diary entry?
- A diary entry is personalized so write in first person.
- At times you may leave out the pronoun ‘I’.
- Refer to personal memories and give details.
- Use conversational and friendly language.
- Refer to parents, friends, etc. as how you would address them in person.
What is CGS full form?
The full form of CGS system is Centimeter Gram Second system. In the CGS system, fundamental units are Centimeter, Gram, and second. The full form of FPS system is Foot Pound Second system.
What is meant by 1 newton?
It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second. One newton is equal to a force of 100,000 dynes in the centimetre-gram-second (CGS) system, or a force of about 0.2248 pound in the foot-pound-second (English, or customary) system.
What is the unit of speed?
Speed is defined as the rate of change of distance with time. It has the dimension of distance by time. Thus, the SI unit of speed is given as the combination of the basic unit of distance and the basic unit of Time. Thus, the SI unit of speed is metre per second.
What is the unit of momentum?
Therefore, the unit for momentum can be Newton-second (Ns). In the CGS system, if the mass is in grams and the velocity in centimeters per second, then the unit of momentum will be gram-centimeters per second (g⋅cm/s).