Formation of the Earth

Q. Which is the thinnest layer of earth?

1. None of the above
2. Continental Crust
3. Mantle
4. Oceanic Crust

Q. The Earth's inner core is in a state, while the outer core is in a state.

1. solid
2. liquid
3. gaseous
4. semi-gaseous

Q. The Earth's inner core is in a state, while the outer core is in a state.

1. solid
2. liquid
3. gaseous
4. semi-gaseous

Q. The earth was formed around _____ years ago.

1. 4.5 billion
2. 4.0 million
3. 4.5 million
4. 4.0 billion

Q. Gravity is an attractive force between two bodies.

1. False
2. True

Q. The Earth's inner core is in a state, while the outer core is in a state.

1. solid
2. liquid
3. gaseous
4. semi-gaseous

Q. Gravity can only be a repulsive force.

1. False
2. True

Q. The core is primarily made up of -

1. Silica
2. Iron
3. Magnesium
4. All of these

Q. Write a short note on various marine deposits found on the ocean bed.

Q. Gravity is an attractive force between two bodies.

1. False
2. True

Q. Mark the true statement.

1. The inner core is liquid because the heat there overcomes the effect of pressure.
2. The outer core is liquid because here, the heat overcomes the effect of the pressure.
3. The inner core is solid because here, the pressure overcomes the effect of heat.
4. All of the above

Q. ____ things settle on the bottom and _____ things rise to the top.

1. Lighter, heavier
2. Liquid, Solid
3. Solid, Liquid
4. Heavier, Lighter

Q. Gravity can only be a repulsive force.

1. False
2. True

Q. The relief feature formed due to the subduction of the plate one beneath the other is known as

1. Shoreline
2. Continental shelf
3. Trenches
4. Continental slope

Q. Mark the true statement.

1. The inner core is liquid because the heat there overcomes the effect of pressure.
2. The outer core is liquid because here, the heat overcomes the effect of the pressure.
3. The inner core is solid because here, the pressure overcomes the effect of heat.
4. All of the above

Q. _____ makes atoms move further away from each other and _____ forces them to come closer to each other.

1. Temperature, Gravity
2. Heat, Pressure
3. Pressure, Heat
4. Gravity, Temperature

Q. A solid has bcc structure . If the distance of nearest approach between two atoms is 1.73 A^° , the edge length of the cell is

Q. Radius of earth is approximately _____.

1. 6, 200 km
2. 6, 400 km
3. 6, 000 km
4. 6, 500 km

Q. The core is primarily made up of -

1. Silica
2. Iron
3. Magnesium
4. All of these

Q. The Earth's inner core is in a state, while the outer core is in a state.

1. solid
2. liquid
3. gaseous
4. semi-gaseous

Q. Inside earth, we have really _____ molten things floating around inside, and it gets progressively _______ as we keep going outward.

1. light ; hotter and heavier
2. light ; colder and heavier
3. light ; colder and lighter
4. heavy ; colder and lighter

Q. Which is the thinnest layer of earth?

1. None of the above
2. Continental Crust
3. Mantle
4. Oceanic Crust

Q. The earth was formed around _____ years ago.

1. 4.0 billion
2. 4.5 billion
3. 4.0 million
4. 4.5 million

Q. _____ makes atoms move further away from each other and _____ forces them to come closer to each other.

1. Heat, Pressure
2. Pressure, Heat
3. Temperature, Gravity
4. Gravity, Temperature