Sub-atomic particles:
(i) Proton (p): This is the positively charged particle and it is located at the nucleus.
(ii) Neutron (n): Neutron is inside the nucleus. The neutron does not have any charge. Except hydrogen (protium), the nucleus of all atoms contain neutrons.
(iii) Electron(e): This is a negatively charged particle. Electrons revolve around the nucleus of the atom in specific orbits.

Tuberculosis:
(i) Causative agent  : Mycobacterium tuberculae bacteria.
(ii) Transmission : Spread from one person to another through air by spitting and prolonged contact with patient.
(iii) Symptoms : Fever, weight loss, chronic cough, bloody spitting and difficulty in breathing
(iv) Prevention and treatment : BCG vaccinations. Giving special attention to the patient. Regular medication like DOT
Chicken pox:
(i) Causative agent : varicella zoster virus.
(ii) Transmission : Spread through air and contact with infected person.
(iii) Symptoms : Appearance of rashes on the whole body, fever, headache and tiredness.
(iv) Prevention and treatment : Chicken pox vaccine is the best way to prevent. Special attention should be given to infected person
Robies:
(i) Causative agent: Virus (rhabdo virus)
(ii) Transmission : By the bite of the infected dog, cat, etc.
(iii) Symptoms: Hydrophobia, fever for 2-12 weeks and exaggerations
(iv) Prevention and treatment : Fatality can be prevented by timely vaccination before onset of symptoms.

Properties of metalloids :
(i) Metalloids exhibit the properties of both metals and non-metals.
(ii) Unusually they look like metals but behave largely like non-metals,
(iii) They can form alloys like metals.

Take a leaf from any one of trees in your neighbourhood. Place the leaf on a graph sheet and draw the outline of the leaf with a pencil. Remove the leaf. You can see the outline of the leaf on the graph sheet.
i) Now count the number of whole squares enclosed within the outline of the leaf. Take it to be M
ii) Then count the number of squares that are more than half. Take it as N
iii) Next, Count the number of squares which are half of a whole square. Note it to be P.
iv) Finally, count the number of squares that are less than half. Let it be a Q.
v) Now the approximate area of the leaf can be calculated using the following formula.
Approximate area of the leaf = M+(3/4)N+(1/2)P+(1/4)
This formula can be used to calculate the area of any irregularly shaped plane figures.

In underground modified stem, whole stem is burried under the ground and it has definite growth. Some stems that grow under the ground to store food. There are four types of underground stems they are,
i) Rhizome:
It is underground thick stem with nodes and internodes with scale leaves at the node.
(Eg) Ginger and turmeric.
ii) Corm:
This underground stem is round in shape and flat at the top and bottom. The daughter plants are arise from their buds. (Eg) Colocasia.
iii) Tuber:
It is an enlarged spherical underground stem and stores food. It has many dormant buds and it grows into a new plant. (Eg) Potato.
iv) Bulb:
It is a condensed stem which is disc like and stores food in the fleshy leaves.
The bulb has two types of leaves
1) Fleshy leaves - Inner part of stem
2) Scaly leaves - Upper part of stem
(E.g) Garlic and onion

Step 1: Open the application of 'Microsoft Photostory'. In that select "Begin A New Story" and click on Next.
Step 2: Click "Import Picture" in the next screen. Select 'Saved pictures' for video. If required, We can edit the image and click on Next.
Step 3: Now we can input small text, animation, audio effect for the picture then click Next.
Step 4: To provide background music, we can select a music file through "Select Music" and click on Next.
Step 5: select a title for the story, then through SETTINGS change the format of the video.
Step 6: Now our video is ready to view. Click "VIEW YOUR STORY". You can see your video now.