6th Grade: What Do You Know About Earth Science?

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6th Grade: What Do You Know About Earth Science? - Quiz

Rivers are the links in the water cycle that return water from the atmosphere to the seas. They begin in upland areas and flow downhill, affecting the landscape around them. In the upland areas, a river valley has a V-shape. Rivers form part of the most vital elements of the earth, how well do you know about River Landscapes?


Questions and Answers
  • 1. 

    What is a smaller river that flows into a larger one?

    • A.

      Contributary

    • B.

      Delta

    • C.

      Distributary

    • D.

      Tributary

    Correct Answer
    D. Tributary
    Explanation
    A smaller river that flows into a larger one is called a tributary. Tributaries are important as they contribute water, sediment, and nutrients to the larger river. They also help in maintaining the overall health and flow of the river system.

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  • 2. 

    How is a river valley best described in the uplands?

    • A.

      U-shaped

    • B.

      V-shaped

    • C.

      Y-shaped

    • D.

      Z-shaped

    Correct Answer
    B. V-shaped
    Explanation
    A river valley in the uplands is best described as V-shaped. This is because in the uplands, the river cuts through the landscape, eroding the surrounding rocks and creating a narrow, steep-sided valley with a V-shaped cross-section. The river flows swiftly through this type of valley, as it has a steeper gradient. The V-shape is characteristic of youthful rivers and is formed through the erosive action of the flowing water over time.

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  • 3. 

    The point where a tributary joins a river is called what?e do you like?

    • A.

      Confluence

    • B.

      Confusion

    • C.

      Conglomeration

    • D.

      Continuance

    Correct Answer
    A. Confluence
    Explanation
    A confluence is the point where a tributary joins a river. It is the meeting point of two bodies of water, where the smaller stream merges into the larger one. This term is commonly used in geography to describe the merging of rivers, and it signifies the point of convergence.

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  • 4. 

    Which of the following is most likely to be found in the highest part of a river valley?

    • A.

      Flood plain

    • B.

      Meander

    • C.

      Mouth

    • D.

      Source

    Correct Answer
    D. Source
    Explanation
    The source is the starting point of a river, usually located in the highest part of a river valley. It is where water emerges from the ground or from a spring, and begins to flow downstream. The other options, such as flood plain, meander, and mouth, are typically found further downstream in the river's course.

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  • 5. 

    What is the ideal situation for a waterfall to form?

    • A.

      An area of hard rock only

    • B.

      An area of soft rock only

    • C.

      Hard rock on top of soft rock

    • D.

      Soft rock on top of hard rock

    Correct Answer
    C. Hard rock on top of soft rock
    Explanation
    In order for a waterfall to form, it is ideal to have hard rock on top of soft rock. This is because soft rock is easily eroded by the force of water, while hard rock is more resistant to erosion. When water flows over the soft rock and reaches the hard rock layer, it creates a sudden drop or cliff, resulting in the formation of a waterfall. The hard rock acts as a resistant barrier, causing the water to plunge downwards, creating the characteristic cascading effect of a waterfall.

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  • 6. 

    A curve or bend in a river has what name?

    • A.

      Convolution

    • B.

      Hairpin

    • C.

      Meander

    • D.

      Serpentine

    Correct Answer
    C. Meander
    Explanation
    A curve or bend in a river is commonly referred to as a meander. Meanders occur naturally in rivers as a result of erosion and deposition processes. As water flows, it erodes the outer bank of a bend and deposits sediment on the inner bank, causing the river to gradually change its course. Meanders are characteristic of mature rivers and can create intricate patterns as the river winds its way through the landscape.

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  • 7. 

    What are the sides of a river channel called?

    • A.

      Banks

    • B.

      Necks

    • C.

      Plains

    • D.

      Rims

    Correct Answer
    A. Banks
    Explanation
    The sides of a river channel are called banks. These are the areas that confine and contain the flowing water within the channel. The banks can be composed of various materials such as soil, rocks, or vegetation. They play a crucial role in shaping the river's course and preventing excessive erosion or flooding.

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  • 8. 

    Where in a meander does the river flow fastest?

    • A.

      In the centre

    • B.

      It has the same speed everywhere

    • C.

      On the inside of the bend

    • D.

      On the outside of the bend

    Correct Answer
    D. On the outside of the bend
    Explanation
    In a meander, the river flows fastest on the outside of the bend. This is because the water is forced to travel a longer distance on the outside of the bend compared to the inside. As a result, the water velocity increases on the outside, leading to faster flow. On the inside of the bend, the water has a shorter distance to travel, causing slower flow.

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  • 9. 

    A river leaves material behind through which process?

    • A.

      Abrasion

    • B.

      Deposition

    • C.

      Erosion

    • D.

      Transition

    Correct Answer
    B. Deposition
    Explanation
    Deposition is the process by which a river leaves material behind. When the velocity of the river decreases, it loses its ability to carry sediment and deposits it on the riverbed or on the banks. This can occur when the river enters a larger body of water, when the gradient decreases, or when there is a decrease in the volume of water. Deposition plays a crucial role in shaping the landscape and forming features such as river deltas and floodplains.

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  • 10. 

    Rivers wind around ridges known as what?

    • A.

      Benches

    • B.

      Gunners

    • C.

      Outcrops

    • D.

      Spurs

    Correct Answer
    D. Spurs
    Explanation
    Rivers wind around ridges known as spurs. Spurs are elongated ridges that are formed by erosion and are typically found along the outer bends of a river. As the river flows, it erodes the outer bank, causing the formation of a ridge or spur. These spurs help to redirect the flow of the river and prevent further erosion of the outer banks. They also play a role in shaping the overall course of the river.

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