Chemistry
Grade-10
Easy
Question
Which of the following is NOT an example of a physical change?
- Smashing a soda can
- Wood breaking apart
- Salt dissolving in water
- Iron rusting
Hint:
Physical change is a type of change where the physical properties such as shape or size of matter alter. Such changes are usually reversible.
The correct answer is: Iron rusting
Rusting of iron is not an example of physical change.
- When the iron is exposed to air and moisture, rust formation takes place.
- Rust is nothing but iron oxide; a new substance formed out of the reaction.
- Hence the rusting of iron is not a physical change but it is a chemical change resulting from the chemical reaction of iron and moisture.
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Which of these examples is a physical change?
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______________is the direct source of information about the Earth’s interior.
______________is the direct source of information about the Earth’s interior.
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Convection currents occur in_________.
- Heated mantle material rise from deep inside the mantle, while cooler mantle material sinks, creating a convection current.
- This type of current is responsible for the movements of the plates of Earth's crust.
Convection currents occur in_________.
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- Heated mantle material rise from deep inside the mantle, while cooler mantle material sinks, creating a convection current.
- This type of current is responsible for the movements of the plates of Earth's crust.
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Select the false statement.
Select the false statement.
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Which of the following statement is correct?
Which of the following statement is correct?
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Lithosphere consists of _____________.
- The lithosphere is the coolest and most rigid part of Earth.
Lithosphere consists of _____________.
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- The lithosphere is the coolest and most rigid part of Earth.
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Gravity is an indirect source of Earths interior.
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Gravity is an indirect source of Earths interior.
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Outer core is present in ________.
Outer core is present in ________.
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_______is the thickness of the oceanic crust.
_______is the thickness of the oceanic crust.
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Choose the correct statement about the source of information of Earth’s interior.
Choose the correct statement about the source of information of Earth’s interior.
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Continental crust consists of ___________.
Continental crust consists of ___________.
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Continental crust is _____________ than oceanic crust.
- Oceanic crust differs from continental crust in several ways:
- It is thinner, denser, younger, and of different chemical composition.
Continental crust is _____________ than oceanic crust.
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- Oceanic crust differs from continental crust in several ways:
- It is thinner, denser, younger, and of different chemical composition.
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Magma indicates________.
- Magma is extremely hot liquid and semi-liquid rock located under Earth's surface.
- This magma can push through holes or cracks in the crust, causing a volcanic eruption.
Magma indicates________.
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- Magma is extremely hot liquid and semi-liquid rock located under Earth's surface.
- This magma can push through holes or cracks in the crust, causing a volcanic eruption.
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The mean density of material in oceanic crust is____________.
The mean density of material in oceanic crust is____________.
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