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The joint between the rib and breast bone is a fixed joint.
Concept: undefined >> undefined
Match the following
| 1. | Humerus | a. | Forearm |
| 2. | Radius | b. | Leg |
| 3. | Tarsals | c. | Upper arm |
| 4. | Atlas | d. | vertebral column |
Concept: undefined >> undefined
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Match the following
| 1. | Ball & socket | a. | Elbow |
| 2. | Saddle | b. | Spine |
| 3. | Hinge | c. | Thumb |
| 4. | Gliding | d. | Hip |
Concept: undefined >> undefined
Name two joints with examples.
Concept: undefined >> undefined
How are joints classified? Explain with an example.
Concept: undefined >> undefined
What are the causes of the endangerment of species?
Concept: undefined >> undefined
Match the following.
| Column I | Column II |
| Convex mirror | Radio telescopes |
| Parabolic mirror | Rear-view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
Concept: undefined >> undefined
Quartz clocks are used in GPS devices.
Concept: undefined >> undefined
What type of oscillations are used in atomic clocks?
Concept: undefined >> undefined
Mention the types of clocks based on their display.
Concept: undefined >> undefined
How many hours are there in a minute?
Concept: undefined >> undefined
Write a short note on different types of clocks.
Concept: undefined >> undefined
A simple barometer was first constructed by _______.
Concept: undefined >> undefined
Match the following.
| Barometer | reduce friction |
| Increasing area of contact | Atmospheric pressure |
| Decreasing area of contact | cause of friction |
| Lubricants | increases friction |
| Irregular surface | decreases friction |
Concept: undefined >> undefined
Vidhya feels that mercury is costly. So, instead of mercury she wants to use water as a barometric liquid. Explain the difficulty of constructing a water barometer.
Concept: undefined >> undefined
If the thickness of a vibrating string is increased, its pitch _____.
Concept: undefined >> undefined
