Last updated on September 18th, 2023 at 12:12 am
Q: How many major continents are there?
A: There are seven major continents.
Q: Which two continents together form the landmass called Eurasia?
A: Asia and Europe together form the landmass called Eurasia.
Q: What is the smallest continent that lies entirely in the Southern Hemisphere called?
A: The smallest continent that lies entirely in the Southern Hemisphere is called Australia.
Q: Which continent is permanently covered with thick ice sheets?
A: Antarctica is the continent that is permanently covered with thick ice sheets.
Q: Why is the ozone layer important to the atmosphere?
A: Ozone absorbs harmful ultraviolet radiation from the sun in the stratosphere.
Q: What are the two main gases that make up clean, dry air in the atmosphere?
A: The two main gases in clean, dry air are nitrogen (78%) and oxygen (%).
Q: What is the highest layer of the atmosphere called?
A: The highest layer of the atmosphere is called the exosphere.
Q: How high does the atmosphere extend from the Earth’s surface?
A: The atmosphere extends up to a height of about ,600 kilometers.
Q: What happens to the density of the atmosphere as we go higher from sea level?
A: The density of the atmosphere decreases rapidly as we go higher from sea level.
Q: What problem do climbers experience at high altitudes due to the decrease in air density?
A: Climbers experience difficulty in breathing at high altitudes due to the decrease in air density.
Q: What do climbers carry with them to be able to breathe at high altitudes?
A: Climbers carry oxygen cylinders with them to be able to breathe at high altitudes.
Q: How does temperature change as we move upwards in the atmosphere?
A: The temperature decreases as we move upwards in the atmosphere.
Q: What is the biosphere defined as?
A: The biosphere is defined as the zone where life exists on Earth.
Q: What can cutting forests and clearing land for agriculture lead to?
A: Cutting forests and clearing land for agriculture can lead to soil erosion.
Q: Which domain of the Earth includes the solid portion on which we live?
A: The domain of the Earth that includes the solid portion on which we live is the lithosphere.
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