QDB1013_Online Quiz 1 (CLO1&CLO2)

Below are the terrestrial planets EXCEPT:

• 
• 
• 
• 

Answer explanation

Jupiter is Jovian Planet and is considered a gas-giant planet

If Mercury is known as the closest planet to the sun, Venus is known as:

• The Darkest Planet

• The Brightness Planet

• The Coldest Planet

• The Furthest Planet

Answer explanation

Besides being the hottest planet in the solar system, Venus appears to be the brightest planet in Earth's sky.

Here are some of the reasons why Venus is the brightest planet in our solar system:

• Thick clouds: Venus has thick clouds that are made of sulfuric acid. These clouds reflect about 70% of the sunlight that hits them, which makes Venus appear very bright in the night sky.

• Proximity to Earth: Venus is the closest planet to Earth. This means that it is often visible in the night sky, and it can appear even brighter than the moon.

• Venus's atmosphere: Venus's atmosphere is very thick and hot. This atmosphere traps heat, which makes Venus the hottest planet in our solar system. The heat from Venus's atmosphere also makes the Earth appear brighter in the night sky.

If Meteorite is a space rock that hits the ground of a planet, a meteoroid is_______________.

• small piece of rock or metal that travels through space

• small piece of rock or metal enters Earth's atmosphere and burns up.

• small piece of rock or metal orbiting the sun that are found between the orbits of Mars and Jupiter

• cosmic snowball of frozen gases, rock, and dust that orbit the Sun

Answer explanation

A meteoroid is a small rocky or metallic body in outer space. when it enters the Earth's atmosphere it will call a meteor and when it hits the Earth's surface it will call meteorite.

Which of the following planets has the longest day?

• Venus

• Saturn

• Earth

• Neptune

Answer explanation

Venus takes 5832 hours to complete one rotation about its axis. Note: One unique fact about Venus is that it completes the revolution around the Sun faster than rotation about its axis.

The Earth's core is composed of:

• • Ferum and nickel

• • Silicon and oxygen

• • Magnesium and silicon

• • Sulfur and carbon

Answer explanation

Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core's iron-nickel alloys is simply the elements' chemical symbols—NiFe. Elements that dissolve in iron, called siderophiles, are also found in the core.

The Earth's mantle is composed of:

• Molten Rock

• Solid Rock

• Gaseous Rock

• Liquid Rock

Answer explanation

The mantle is mostly solid rock, but less viscous at tectonic plate boundaries and mantle plumes. Mantle rocks there are soft and able to move plastically (over the course of millions of years) at great depth and pressure. Note: Mantle has a greater density (~3.4 gcm⁻³) compared to crust (~2.6 gcm⁻³).

The Earth's lithosphere is composed of:

• • The mantle and the core

• • The crust, the mantle, and the core

• • The crust and the lowermost mantle

• • The crust and the uppermost mantle

Answer explanation

The lithosphere is the solid, outer part of Earth. The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth's structure. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below.

Which of the following is TRUE about the continental and oceanic crusts?

• • Oceanic crust is thicker than continental crust.

• • Oceanic crust is made up of heavier elements than continental crust.

• • Continental crust is denser than oceanic crust.

• • continental crust always subducted below oceanic crust

Answer explanation

Oceanic crust is denser than continental crust because it has a different composition. Oceanic crust is made of basalt, while continental crust is made of granite. Basalt is denser than granite.

The Earth's crust is constantly being eroded by wind, water, and ice. What is the process by which the Earth's crust is eroded?

• • Weathering

• • Erosion

• • Deposition

• • All of the above

Why the inner core is solid while the outer core is liquid?

• • The inner core is under more pressure than the outer core.

• • The inner core is made of different materials than the outer core.

• • The inner core is hotter than the outer core.

• • The inner core is older than the outer core.

Answer explanation

The inner core's intense pressure—the entire rest of the planet and its atmosphere—prevents the iron from melting. The pressure and density are simply too great for the iron atoms to move into a liquid state