NCERT Class 7 Geography — Chapter 2: Our Changing Earth

Consider the following pairs: 1. Angel Falls : South America 2. Niagara Falls : Africa 3. Victoria Falls : North America Which of the pairs given above is/are correctly matched?

As the river enters the plain, it twists and turns forming large bends known as:

What causes the movement of Lithospheric plates?

With reference to Earthquakes, consider the following statements: 1. The place in the crust where the movement starts is called the focus. 2. The place on the surface above the focus is called the focus. 3. Vibrations travel outwards from the epicentre as waves. Which of the statements given above is/are correct?

The material carried by the glacier such as rocks, sand, and silt gets deposited to form:

With reference to the work of wind, consider the following statements: 1. Mushroom rocks are commonly found in river valleys. 2. Winds erode the lower section of the rock more than the upper part. 3. Sand dunes are low hill-like structures formed by wind deposition. Which of the statements given above is/are correct?

Sand dunes are formed when:

Match List I with List II and select the correct answer using the code given below: List I (Feature) | List II (Process) A. Mushroom Rock | 1. River Erosion/Deposition B. Meander | 2. Sea Wave Erosion C. Sea Cave | 3. Glacial Deposition D. Moraine | 4. Wind Erosion

Which of the following is an active agent of erosion and deposition in deserts?

The flat fertile land formed by the deposition of fine soil along river banks during floods is called:

Consider the following statements regarding the formation of a Waterfall: 1. It forms when a river flows through a flat plain. 2. It typically occurs over very hard rocks. 3. It can form down a steep valley side. Which of the statements given above is/are correct?

Consider the following statements regarding the Lithospheric plates: 1. They move around very slowly, just a few millimetres each year. 2. Their movement is driven by the rotation of the earth on its axis. 3. The molten magma inside the earth moves in a circular manner. Which of the statements given above is/are correct?

Hollow-like caves formed on rocks by sea waves are called:

Beaches are formed by the deposition of sediments by:

In the context of wind action, rocks with a narrower base and wider top are called:

The collection of sediments from all the mouths of distributaries forms a:

The process of "deposition" by a river leads to the formation of:

Which of the following is a common indigenous method used for predicting earthquakes?

Which of the following is NOT an agent of Exogenic forces?

Ox-bow lakes are typically found in:

The raised banks along a river in a floodplain are known as:

The steep perpendicular face of a rock along a sea coast is known as:

An earthquake of magnitude 2.0 or less on the Richter scale:

Where is the greatest damage usually found during an earthquake?

Forces that work on the surface of the earth are technically termed as:

The vibrations of an earthquake travel outwards from the epicentre as:

Consider the following statements regarding an Ox-bow lake: 1. It is formed when a meander loop cuts off from the main river. 2. It is an erosional feature found in the mountains. 3. It is also known as a cut-off lake. Which of the statements given above is/are correct?

Glaciers carve out deep hollows which, upon melting of ice, become:

Mushroom rocks have a characteristic shape because:

Consider the following statements regarding the evolution of landforms: 1. Building mountains is an effect of Diastrophic forces. 2. Glaciers and Sea-waves are agents of Endogenic forces. Which of the statements given above is/are correct?

The steep rocky coast rising almost vertically above sea water is called:

The landscape is continuously worn away by which two processes?

With reference to Earth movements, consider the following statements: 1. Endogenic forces work on the surface of the earth. 2. Diastrophic forces are a type of Endogenic force. 3. Sudden forces can cause mass destruction over the surface of the earth. Which of the statements given above is/are correct?

Match List I with List II and select the correct answer using the code given below: List I (Force/Process) | List II (Category) A. Building mountains | 1. Erosional Force B. Earthquake | 2. Exogenic Force C. River | 3. Sudden Force D. Wind | 4. Diastrophic Force

Consider the following statements about Weathering and Erosion: 1. Weathering is the breaking up of rocks on the earth’s surface. 2. Erosion is the process of building up the landscape. 3. Eroded material is eventually deposited to create new landforms. Which of the statements given above is/are correct?

Consider the following statements regarding earthquake measurement: 1. An earthquake is measured with a machine called a barometer. 2. The magnitude of the earthquake is measured on the Richter scale. 3. An earthquake of magnitude 5.0 is classified as a major earthquake. Which of the statements given above is/are correct?

Match List I with List II and select the correct answer using the code given below: List I (Richter Magnitude) | List II (Impact) A. 2.0 | 1. Very strong B. 5.0 | 2. Damage from falling things C. 6.0 | 3. Major earthquake D. 7.0 | 4. Felt only a little

Which instrument is used to measure an earthquake?

In the formation of a waterfall, the water power typically undercuts:

With reference to river meanders, consider the following statements: 1. They are formed when the river enters the plain. 2. No erosion or deposition occurs along the sides of the meander. 3. The ends of the meander loop eventually move further apart. Which of the statements given above is/are correct?

Match List I with List II and select the correct answer using the code given below: List I (Waterfall) | List II (Location) A. Angel Falls | 1. North America B. Niagara Falls | 2. Asia C. Victoria Falls | 3. Africa D. Jog Falls | 4. South America

Consider the following statements regarding river features: 1. The raised banks of a river are called deltas. 2. As the river approaches the sea, its speed decreases. 3. The collection of sediments from all distributary mouths forms a delta. Which of the statements given above is/are correct?

Consider the following statements regarding coastal landforms: 1. A steep rocky coast rising almost vertically above sea water is called a sea cliff. 2. Sea waves erode the shores to form beaches. Which of the statements given above is/are correct?

Consider the following statements regarding Loess: 1. It is formed when wind carries heavy rocks over short distances. 2. It is a depositional feature. 3. Large deposits of loess are found in Antarctica. Which of the statements given above is/are correct?

Consider the following statements regarding Glaciers: 1. They are rivers of ice. 2. They do not erode the landscape. 3. They deposit material such as sand and silt to form glacial moraines. Which of the statements given above is/are correct?

Large deposits of Loess are famously found in:

With reference to Earth's vibrations, consider the following: 1. They travel only in a straight line. 2. They are produced when Lithospheric plates move. 3. The strength of the vibration decreases as it moves away from the epicentre. Which of the statements given above is/are correct?

Match List I with List II and select the correct answer using the code given below: List I (Agent) | List II (Landform) A. River | 1. Sand Dune B. Wind | 2. Moraine C. Glacier | 3. Stack D. Sea Waves | 4. Levee

Which of the following is a depositional feature of a glacier?

With reference to the work of sea waves, consider the following statements: 1. Sea caves are formed when cracks in rocks become larger and wider. 2. When only the roof of the cave remains, it forms a stack. 3. Wall-like features left after the roof breaks are called sea arches. Which of the statements given above is/are correct?

Consider the following statements regarding the activity of a river: 1. When a river tumbles at a steep angle over hard rocks, it forms a waterfall. 2. A river becomes very fast as it approaches the sea. 3. Distributaries do not form mouths. Which of the statements given above is/are correct?

Consider the following statements regarding the work of a river: 1. A river forms a delta when it approaches the sea and breaks up into distributaries. 2. Distributaries are formed near the source of the river. 3. Levees are depositional features found in floodplains. Which of the statements given above is/are correct?

Which of the following is NOT an erosional feature of sea waves?

In what manner does the molten magma typically move inside the Earth?

The origin of seismic energy in the crust is called the:

When a river breaks up into a number of streams before entering the sea, these streams are called:

Which feature is formed when the roof of a sea arch breaks?

Match List I with List II and select the correct answer using the code given below: List I (Coastal Feature) | List II (Description) A. Sea Cave | 1. Wall-like features B. Sea Arch | 2. Only roof of the caves remain C. Stack | 3. Hollows formed on rocks D. Sea Cliff | 4. Steep rocky coast rising vertically

Consider the following statements regarding seismic waves: 1. P waves are also known as surface waves. 2. S waves are also known as transverse waves. 3. L waves are also known as surface waves. Which of the statements given above is/are correct?

The lithosphere is broken into a number of plates known as: