PART
Answer any 8 questions in short
16. What are derived quantities?
17. Distinguish between speed and velocity
18. Distinguish Isotopes from Isobar.
19. Differentiate mass number from atomic number
20. What is the characteristics of proton?
21. What is Cross pollination?
22. Write notes on phyllode
23. Write about the right way of protect the eyes?
24. How to keep your hair clean and health?
25. Define molecule
Answers
Answer:
25 Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.
Explanation:
22 Phyllodes are modified petioles or leaf stems, which are leaf-like in appearance and function. In some plants, these become flattened and widened, while the leaf itself becomes reduced or vanishes altogether. Thus the phyllode comes to serve the purpose of the leaf.17 Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. ... Velocity is the rate at which the position changes. The average velocity is the displacement or position change (a vector quantity) per time ratio.16 Derived quantities are those that may be expressed in terms of base or derived quan- tities by means of the mathematical symbols of multiplication and division only (no addition or subtraction or any other sign). ... The first group consists of derived quantities, which have proper units.23 Wear Sunglasses with Complete Ultraviolet Protection. ...
Use Goggles at the Pool. ...
Wash Hands and Avoid Rubbing Your Eyes. ...
Wear Hats. ...
Protect Against Chemicals. ...
Keep Children Safe and Start Young with Eye Protection. ...
Wear eye protection during outdoor activities. ...
Eat Healthy and Drink Plenty of Water.