Ikalimang Linggo Science para sa Ikatong Kuwarter

science

1. Science 4-Q3 Week 5 Describing how sound, and heat travel (S4FE-IIIf-g-4).

2. Let’s Review!

3. Complete the statements using the words in the box

4. Light can pass through (1) ______________ materials. Some light can pass through (2) ______________ materials. Light cannot pass through (3) ______________ materials, a shadow is formed. The shape of the (4) ______________is similar to the shape of the object.

5. Let’s Try!

6. Name the picture and t ell H if the materials give off heat and S if give off sound.

7. Let’s Discover!

8. What is sound?

9. Sound is produced when things vibrate. Vibrating objects send out sound waves that travel in all directions. These vibrations become sound when they reach our ears.

10. How does sound travel?

11. Sound waves travel at a different speed through different media. The sound wave causes the surrounding air to vibrate. When the vibration is slow, slow-moving waves are produced. When the vibration is fast, fast vibration is produced until such time that vibration stops

12. What is heat?

13. Heat is total energy of all the moving molecules in an object.

14. How does heat travel?

15. Heat travels in all direction. Heat transfers from a warm substance to cool substance in three ways: conduction, convection and radiation

16. Solids become heated mostly by conduction. Liquids become heated mostly by convection. Gases become heated mostly by radiation

17. Let’s Apply!

18. Identify the method of heat transfer (conduction, convection, and radiation) taking place in each situation.

19. 1. melting butter on the table 2. parking of car at daytime in an open area 3. putting the metal skewer near the campfire 4. boiling soup in the casserole 5. exposing nail to the candle flame

20. Let’s Remember

21. Sound is produced when things vibrate. Vibrating objects send out sound waves that travel in all directions. Heat is the transfer of energy from one body to another as a result of a difference in temperature or a change in phase. It is the sensation or perception of such energy as warmth or hotness.

22. Let’s Do It!

23. Write TRUE if the statement is correct or FALSE if it is not. Write your answers on a separate sheet of paper

24. Let’s Answer!

25. Read each statement carefully and choose the letter of the correct answer.

26. 1. The vibration of object produces___________. A. heat C. sound B. light D. radiation energy 2. Which is NOT a method of heat transfer? A. conduction C. radiation B. convection D. vibration 3. It is a method where heat is transferred through direct contact. A. conduction C. radiation B. convection D. vibration

27. 4. How does sound travel through air? A. in jumping motion C. very fast B. fast in a random manner D. very slowly 5. In which medium can sound wave travel fastest? A. gases C. solids B. liquids D. solid and liquid

28. 1. Sound waves travel a little faster through air than in water. 2. Sound waves travel faster in liquid than in solid. 3. Conduction of heat happens in solid materials. 4. Radiant energy travels as a wave through solid materials. 5. Convection of heat happens in gases and in liquids.