Total 14 question (answer any 10)
question 6 is compulsory
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Answers
Explanation:
q1.Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point.
Q3. a celestial body is any natural body outside of the Earth's atmosphere
Q4..A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
Q5. Climate change refers to long-term shifts in temperatures and weather patterns.
Q6.The wave speed is equal to the product of its frequency and wavelength, and this implies the relationship between frequency and wavelength. Hence, V = f λ = 50 × 4 = 200 m/s.
Q7.An acid is a molecule or ion capable of either donating a proton.
Q8.A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH of the solution can be determined visually.
Q9.Some examples of natural indicators are turmeric, grape juice, red cabbage, cherries, onion, beetroot etc.
Q10.A skeleton is a structural frame that supports an animal body.
Q11.Locomotion is the ability of an organism to move from one place to another place.
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