#1
Which layer of the Earth's atmosphere is closest to the surface?
Troposphere
ExplanationThe troposphere is the lowest layer of Earth's atmosphere, where weather events occur and it is closest to the Earth's surface.
#2
What is the primary gas that makes up Earth's atmosphere?
Nitrogen
ExplanationNitrogen is the most abundant gas in Earth's atmosphere, comprising about 78% of the total volume.
#3
Which of the following is an example of a metamorphic rock?
Marble
ExplanationMarble is a type of metamorphic rock that forms from the recrystallization of limestone.
#4
What is the main driving force behind the movement of tectonic plates?
Heat from the Earth's interior
ExplanationTectonic plates move due to the heat-driven convection currents in the Earth's mantle.
#5
What is the term for the process by which water vapor turns into liquid water?
Condensation
ExplanationCondensation is the process where water vapor cools and changes into liquid water, forming clouds.
#6
Which layer of the Earth is primarily composed of solid iron and nickel?
Inner Core
ExplanationThe inner core is the deepest layer of the Earth and is composed of solid iron and nickel.
#7
What is the process by which rocks are broken down into smaller particles due to weathering?
Erosion
ExplanationErosion is the gradual breakdown and transportation of rocks into smaller particles, often caused by natural elements like water and wind.
#8
Which ocean is the largest by surface area?
Pacific Ocean
ExplanationThe Pacific Ocean is the largest ocean on Earth in terms of surface area.
#9
What is the primary greenhouse gas responsible for Earth's warming?
Carbon Dioxide
ExplanationCarbon dioxide is the main greenhouse gas contributing to global warming by trapping heat in the atmosphere.
#10
Which geological era is known as the 'Age of Dinosaurs'?
Mesozoic Era
ExplanationThe Mesozoic Era is often referred to as the 'Age of Dinosaurs' when dinosaurs dominated the Earth.
#11
What is the Richter scale used to measure?
Earthquake Magnitude
ExplanationThe Richter scale is used to measure the magnitude of earthquakes, indicating their strength.
#12
What is the primary cause of ocean tides on Earth?
Moon's gravitational pull
ExplanationOcean tides are primarily caused by the gravitational pull of the Moon on Earth's oceans.