Curriculum
Course: Igcse Physics
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Curriculum

Igcse Physics

1. Motion, Forces and Energy

0/161 Dr Dabour Hub Science Diagram and Course Material

2. Thermal Physics

0/75 Dr Dabour Hub Science Diagram and Course Material

3. Waves

0/77 Dr Dabour Hub Science Diagram and Course Material

4. Electricity and Magnetism

0/119 Dr Dabour Hub Science Diagram and Course Material

5. Nuclear Physics

0/39 Dr Dabour Hub Science Diagram and Course Material

6. Space Physics

0/47 Dr Dabour Hub Science Diagram and Course Material
Quiz

2.1.4 Brownian Motion – Check yourself

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1.
Brownian motion is the
smooth flow of smoke
vibration of atoms in a solid
random motion of visible particles in a fluid
movement of molecules in a vacuum
2.
What causes Brownian motion of smoke particles?
Magnetic forces
Gravity
Light pressure
Collisions with air molecules
3.
In the smoke cell experiment, what is seen through the microscope?
Bright specks of smoke moving randomly
Air molecules
Smoke in a straight line
Still smoke
4.
Brownian motion is evidence that
atoms are heavy
smoke is heavier than air
molecules exist and move randomly
gas pressure is zero
5.
If the temperature is raised, the Brownian motion
stops
becomes more vigorous
stays the same
slows down
6.
Why does a smaller particle show more noticeable Brownian motion than a bigger one?
It is heavier
The resultant force gives it a larger acceleration
It has less energy
It is hotter
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