IGKO Class 4 - Sample question paper 06

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Q76) Where is the headquarters of NASA?

a) New York

b) San Francisco

c) Washington D.C.

d) Dallas

Answer: c) Washington D.C.

Explanation: The headquarters of NASA (National Aeronautics and Space Administration) is located in Washington D.C., USA.

Q77) The tilting of the Earth is responsible for:

a) Changes in day and night

b) Changes in seasons

c) Change of sun rays

d) None of the above

Answer: b) Changes in seasons

Explanation: The tilt of the Earth's axis is responsible for the changing seasons on our planet.

Q78) The earth rotates in which direction?

a) East to West

b) West to East

c) North to South

d) South to North

Answer: b) West to East

Explanation: The Earth rotates from West to East, causing the apparent movement of the Sun and stars across the sky.

Q79) Which of these planets rotates the slowest?

a) Venus

b) Jupiter

c) Saturn

d) All of these

Answer: a) Venus

Explanation: Venus rotates very slowly on its axis, taking a longer time to complete one rotation than it does to orbit the Sun.

Q80) Which planet is known as the Watery Planet?

a) Mercury

b) Venus

c) Earth

d) Jupiter

Answer: c) Earth

Explanation: Earth is often referred to as the "Watery Planet" due to its abundant water resources in the form of oceans, lakes, and rivers.

Q81) The one thing (out of the options given below) common in all fossil fuels is

a) They were formed in marine environment.

b) They contain oxygen.

c) Have gone through a similar arrangement of geological processes during their development.

d) None of these

Answer: c) Have gone through a similar arrangement of geological processes during their development.

Explanation: All fossil fuels, including coal, oil, and natural gas, are formed through a similar arrangement of geological processes over millions of years.

Q82) Considering the environmental changes, the melting of ice and glaciers is

a) endangering of species

b) extinction of human beings

c) devastation

d) desertification

Answer: a) endangering of species

Explanation: The melting of ice and glaciers due to environmental changes can lead to the endangerment of various species that depend on these habitats.

Q83) ____________ is produced by breaking down the organic material in an oxygen-free environment with the help of enzymes.

a) Biomass

b) Biogas

c) Methane gas

d) Carbon-dioxide

Answer: b) Biogas

Explanation: Biogas is produced by breaking down organic material (such as animal waste and plant matter) in an oxygen-free environment through a process called anaerobic digestion, facilitated by enzymes.

Q84) Sunlight is used for generating ____

a) Hydroelectricity

b) Solar Energy

c) Thermal Energy

d) None of the above

Answer: b) Solar Energy

Explanation: Sunlight is used to generate solar energy through photovoltaic cells and solar panels.

Q85) Thermal is related to ____________

a) air

b) wind

c) heat

d) water

Answer: c) heat

Explanation: The term "thermal" is related to heat energy.

Q86) Wind is used as a _____ source of energy.

a) renewable

b) non-renewable

c) exhaustible

d) artificial

Answer: a) renewable

Explanation: Wind is considered a renewable source of energy because it is derived from natural processes that are continuously replenished.

Q87) Non-Renewable resources are _________

a) wind and water

b) air and sun

c) petroleum and fossil fuel

d) coal and air

Answer: c) petroleum and fossil fuel

Explanation: Non-renewable resources are those that cannot be easily replenished within a human lifetime, such as petroleum and fossil fuels.

Q88) Fossil fuels are remains of _________

a) petroleum

b) organisms

c) carbon dioxide

d) only insects

Answer: b) organisms

Explanation: Fossil fuels are formed from the remains of ancient plants and organisms that have undergone a natural process of decomposition and transformation.

Q89) Coal is obtained from _____________

a) pumping

b) extracting

c) drying

d) mining

Answer: d) mining

Explanation: Coal is obtained through the process of mining, where it is extracted from underground or surface coal mines.

Q90) Crude Oil is a ________________ resource.

a) Renewable

b) Non-Renewable

c) Abiotic

d) Potential

Answer: b) Non-Renewable

Explanation: Crude oil, also known as petroleum, is a non-renewable resource as it takes millions of years to form and cannot be quickly replenished once depleted.

Q91) Gases which cause global warming are responsible for increasing the _________.

a) earth’s temperature

b) wind

c) climate

d) energy

Answer: a) earth’s temperature

Explanation: Gases that cause global warming, such as carbon dioxide and methane, contribute to an increase in the Earth's average temperature.

Q92) Which among the following is the cause of global warming?

a) Seeding

b) Evaporation

c) Greenhouse Effect

d) None of the above

Answer: c) Greenhouse Effect

Explanation: Global warming is primarily caused by the greenhouse effect, which is the trapping of heat in the Earth's atmosphere due to certain gases.

Q93) Global warming causes changes in

a) rotation

b) revolution

c) climate

d) gases

Answer: c) climate

Explanation: Global warming leads to changes in the Earth's climate patterns, resulting in shifts in weather conditions and temperature.

Q94) Global warming is caused by effects of

a) soil pollution

b) water pollution

c) noise pollution

d) air pollution

Answer: d) air pollution

Explanation: Global warming is primarily caused by the accumulation of greenhouse gases in the Earth's atmosphere, which is a result of various human activities including burning fossil fuels and industrial processes.

Q95) Soil Pollution is also known as

a) land pollution

b) radioactive pollution

c) water pollution

d) air pollution

Answer: a) land pollution

Explanation: Soil pollution refers to the contamination of soil by pollutants and chemicals, and it is also referred to as land pollution.

Q96) Continental regions have which type of season?

a) Hot summers

b) Cold winters

c) Thunderstorms

d) None of the above

Answer: b) Cold winters

Explanation: Continental regions tend to have cold winters due to their distance from large water bodies, which moderates temperatures in coastal areas.

Q97) The ozone hole is located in the ____

a) Troposphere over the Arctic

b) Stratosphere over the Antarctica

c) Stratosphere over the Arctic

d) Troposphere over the Antarctica

Answer: b) Stratosphere over the Antarctica

Explanation: The ozone hole is primarily located in the stratosphere over the Antarctic region, where there is a significant depletion of ozone layer.

Q98) Which of the following is nonbiodegradable?

a) Paper

b) Cotton

c) Metal can

d) Grass

Answer: c) Metal can

Explanation: Metal cans, like those made of aluminum or steel, are nonbiodegradable materials that do not break down easily in the environment.

Q99) Acid rain is caused due to …………………

a) water pollution

b) air pollution

c) noise pollution

d) soil pollution

Answer: b) air pollution

Explanation: Acid rain is caused by air pollution, particularly the release of sulfur dioxide and nitrogen oxides from human activities like burning fossil fuels.

Q100) The Earth‘s atmosphere is made up of various gases. Which of the following best describes the composition of atmosphere?

a) Oxygen-78%, Nitrogen-21%, Others-1%

b) Oxygen-60%, Nitrogen-30%, Others-10%

c) Nitrogen-78%, Oxygen-21%, Others-1%

d) Nitrogen-78%, Oxygen-21%, Carbon dioxide-1%

Answer: c) Nitrogen-78%, Oxygen-21%, Others-1%

Explanation: The composition of the Earth's atmosphere is primarily nitrogen (about 78%), followed by oxygen (about 21%), and a small percentage of other gases.

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