Advertisements
Advertisements
Question
How is sand that flows in a river formed? Collect some information about where the sand comes from.
Advertisements
Solution
- The force of flowing streams is so great that they may destroy rocks and soil.
- The powerful stream currents erode rocks on higher ground, which are then swept away into the sea.
- Additionally, silt is carried down from the mountain top where the streams begin.
- The majority of the sand in the river is silt that the streams carry, together with weather material from inland rocks.
- Sand formation in a river is caused by erosion, which is the movement of rock and soil with the stream.
RELATED QUESTIONS
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Classify the following rocks by selecting the correct option given below:
marble
Name any two characteristics of Igneous Rocks.
Name different types of sedimentary rocks.
What is meant by the term ‘metamorphism’?
Classify the following rock: Rock salt
Classify the following rock: Marble
Classify the following rock: Graphite
Give one word for the following.
Igneous rocks, which contain a high percentage of silica.
Give one term for the following statement:
Formed when mud layers compacted under great pressure composing 80% of this rock.
Give one term for the following statement:
Type of metamorphism in which changes are caused due to high pressure.
Give reasons for the following
Silicates are the most common rock forming minerals.
Match the following:
| (a) | Igneous | (i) | Magma |
| (b) | Sedimentary | (ii) | Transformation |
| (c) | Metamorphic | (iii) | Gypsum |
| (d) | Molten material | (iv) | Basalt |
| (e) | Rock Cycle | (v) | Marble |
The word ‘Igneous’ is derived from the ______ word.
Explain the type of Igneous Rocks.
______ rocks are also known as stratified rocks.
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
