6th Standard Syllabus & Materials
6th Standard
Tamilnadu 6th Standard Tamil இயல் 3 - எல்லாரும் இன்புற - பெயர்ச்சொல் Important Questions And Answers Study Material - QB365 Set B
NEW6th Standard
Tamilnadu 6th Standard Tamil இயல் 3 - எல்லாரும் இன்புற - பெயர்ச்சொல் Important Questions And Answers Study Material - QB365 Set A
NEW6th Standard
Tamilnadu 6th Standard Tamil இயல் 2 - கூடித் தொழில் செய் - சுட்டு எழுத்துகள், வினா எழுத்துகள் Important Questions And Answers Study Material - QB365 Set B
NEW6th Standard
Tamilnadu 6th Standard Tamil இயல் 2 - கூடித் தொழில் செய் - சுட்டு எழுத்துகள், வினா எழுத்துகள் Important Questions And Answers Study Material - QB365 Set A
NEW6th Standard
Tamilnadu 6th Standard Tamil பருவம் 1 - இயல் 1 - மொழி -தமிழ்த்தேன் - இன்பத்தமிழ் Important Questions And Answers Study Material - QB365
NEW6th Standard
Tamilnadu 6th Standard Social Science T3 - குடிமையியல் - உள்ளாட்சி அமைப்பு - ஊரகமும் நகர்ப்புறமும் Important Questions And Answers Study Material - QB365 Set B
Published on: 30/09/2019
Air
Download Tamil Nadu 6th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
________ gas turns lime water milky.
2.
__________ can be seen moving in a beam of sunlight in a dark room.
3.
The gas given out during photosynthesis is _________.
4.
__________ is the active component of air.
5.
The balance of oxygen in atmosphere is maintained through photosynthesis in animals and respiration in plants.
6.
Whales come up to the water surface to breathe in oxygen.
7.
The composition of air is always exactly the same.
8.
Planting trees help in decreasing global warming.
9.
Inhaled air contains a large amount of carbon-di-oxide.
10.
78% of air : Does not support combustion :: _____ : Supports combustion.
11.
Photosynthesis : _____ :: Respiration : Oxygen.
12.
What will happen if you breathe through mouth?
13.
How do the roots of land plants get oxygen for breathing?
14.
What is atmosphere? Name the five layers of atmosphere
15.
Why do traffic assistants wear a mask on duty?
16.
Why is atmosphere essential for life on earth?
17.
How do plants and animals maintain the balance of oxygen and carbon-dioxide in air?
18.
Nitrogen is used in the food packaging industry because it ________________
provides colour to the food
provides oxygen to the food
adds proteins and minerals to the food
keeps the food fresh
19.
Gas exchange takes place in plants using __________
Stomata
Chlorophyll
Leaves
Flowers
20.
____________ is the percentage of nitrogen in air.
78%
21%
0.03%
1%
21.
carbon-di-oxide
22.
Oxygen
23.
Stratosphere
24.
Layer in which we live
25.
Moving Air
1.
( )
Carbon-di-oxide
2.
( )
Tiny dust particles
3.
( )
Oxygen
4.
( )
Oxygen
5.
False - Correct statement: The balance of oxygen in atmosphere is maintained through photosynthesis in plants and respiration in plants.
6.
True
7.
False - Correct statement: The composition of air changes slightly from place to place.
8.
True
9.
False - Correct statement: Inhaled air contains a large amount of oxygen.
10.
21% of air
11.
carbon-di-oxide
12.
If you breathe through mouth,
(i) getting oxygen to our muscles faster
(ii) it will cause crooked teeth for children
(iii) it leads to gum disease in adults
(iv) it may cause stress to the heart and lungs.
13.
The roots of a plant take up air from the spaces between the soil particles.
14.
Our earth surrounded by a huge envelope of air is called 'Atmosphere'. Five layers of atmosphere are:
(i) Troposphere
(ii) Stratosphere
(iii) Mesosphere
(iv) Ionosphere
(v) Exosphere
15.
They are exposed to harsh weather conditions, dust, pollution, heat and cold. So, they can have an adverse effect on their health. Hence, they weak a mask on duty.
16.
A huge envelope of air surrounded the earth is called Atmosphere.
(i) This envelope is thicker near the earth's surface.
(ii) As we go higher up, the density and the availabillty of air gradually decreases.
(iii) Movement of wind, Presence of water vapours for cloud formation are the vital roles of atmosphere.
(iv) Troposphere is the responsible layer for the weather we experience on earth.
(v) Stratosphere has the Ozone layer which protects all life on earth from the harmful UV rays of the sun.
17.
PHOTOSYNTHESIS:
Plants manufacture food by a process called photosynthesis. During photosynthesis, carbon-dioxide from the air and water from the soil react in the presence of sunlight and chlorophyll to produce food.
\(\text { Carbon-di-oxide }+\text { water } \underset{\text { Chlorophyll }}{\stackrel{\text { Sunlight }}{\longrightarrow}} \text { food }+\text { oxygen }\)
RESPIRATIO IN ANIMAL :
When we breathe in air, the oxygen present in the air reacts chemically with digested food within the body to produce carbon-di-oxide gas, water vapour and energy.
Food + Oxygen Carbon-di-oxide + Water + Energy
(i) carbon-di-oxide formed during respiration dissolves in the blood and is exhaled out of the body through the lungs.
(ii) Plants release oxygen during photosynthesis which is much more than the oxygen consumed by the plants, during respiration.
(iii) Thus, the balance of O2 & CO2 in air is maintained.
18.
(d)
keeps the food fresh
19.
(a)
Stomata
20.
(a)
78%
21.
Photosynthesis
22.
Combustion
23.
Ozone layer
24.
Troposphere
25.
Wind
6th Standard Syllabus & Materials
6th Standard
Tamilnadu 6th Standard Social Science T3 - குடிமையியல் - உள்ளாட்சி அமைப்பு - ஊரகமும் நகர்ப்புறமும் Important Questions And Answers Study Material - QB365 Set A
NEW6th Standard
Tamilnadu 6th Standard Social Science T3 - குடிமையியல் - மக்களாட்சி Important Questions And Answers Study Material - QB365 Set B
NEW6th Standard
Tamilnadu 6th Standard Social Science T3 - குடிமையியல் - மக்களாட்சி Important Questions And Answers Study Material - QB365 Set A
NEW6th Standard
Tamilnadu 6th Standard Social Science T3 - புவியியல் - பேரிடரைப் புரிந்து கொள்ளுதல் Important Questions And Answers Study Material - QB365 Set B
Tamilnadu Stateboard 6th Standard Subjects
Tamilnadu Stateboard Standards
