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1000+ MCQs for Grade-6

Topic:

1: 1. What is air composed of?
a. Oxygen and Nitrogen
b. Hydrogen and Carbon
c. Helium and Argon
d. Carbon dioxide and Water vapor
Answer: a. Oxygen and Nitrogen

2: 2. Which gas makes up the majority of Earth's atmosphere?
a. Oxygen
b. Nitrogen
c. Carbon dioxide
d. Hydrogen
Answer: b. Nitrogen

3: 3. What gas do plants absorb from the air during photosynthesis?
a. Oxygen
b. Carbon dioxide
c. Nitrogen
d. Hydrogen
Answer: b. Carbon dioxide

4: 4. What is the approximate percentage of oxygen in the air?
a. 21%
b. 50%
c. 78%
d. 10%
Answer: a. 21%

5: 5. Which layer of the atmosphere contains the ozone layer?
a. Troposphere
b. Stratosphere
c. Mesosphere
d. Thermosphere
Answer: b. Stratosphere

6: 6. What is the role of the ozone layer in the atmosphere?
a. Absorbing ultraviolet (UV) radiation
b. Producing oxygen
c. Absorbing carbon dioxide
d. Creating rain
Answer: a. Absorbing ultraviolet (UV) radiation

7: 7. Which gas do humans and animals inhale from the air?
a. Nitrogen
b. Oxygen
c. Carbon dioxide
d. Hydrogen
Answer: b. Oxygen

8: 8. What is the process by which plants release water vapor into the air?
a. Transpiration
b. Condensation
c. Evaporation
d. Precipitation
Answer: a. Transpiration

9: 9. Which layer of the atmosphere is closest to the Earth's surface?
a. Troposphere
b. Stratosphere
c. Mesosphere
d. Thermosphere
Answer: a. Troposphere

10: 10. What is the process of the Earth's surface warming up due to the sun's rays?
a. Conduction
b. Convection
c. Radiation
d. Insulation
Answer: c. Radiation

Learn New Vocabulary

Word: slew

Meaning: a large number or amount or extent

Sentences: In fact, intense focus may be one reason why so-called savants become so extraordinary at performing extensive calculations or remembering a slew of facts.Scientific American (Mar 3, 2012)

Facts of Science

Do you know ?

Fact: Cows have best friends and can become stressed when they are separated.

Facts of Digital World

Do you know about Emoji Day ?

World Emoji Day is celebrated on July 17, chosen because it's the date shown on the calendar emoji.

Learn New Vocabulary

Word: constitute

Meaning: compose or represent

Sentences: Oil and natural gas constituted almost 50 percent of Russian government revenue last year.

Facts of Science

Do you know ?

Fact: Octopuses have three hearts: two pump blood to the gills, and one pumps it to the rest of the body.

Facts of Digital World

Do you know about Internet Addiction Disorder (IAD) ?

Excessive use of the internet, leading to negative impacts on daily life, is termed Internet Addiction Disorder.