Bigyan ko 100 pts maka sagot now na

_____1. Which of the following type of heat transfer where heat energy is transferred by particle to neighbouring particles or through solid?
A. Convection C. Radiation
B. Conduction D. Insulation
_____2. Which does not belong to the group?
A. Radiation C. Absorption
B. Convection D. Conduction
_____3. The transfer of energy through matter from molocule to molecule and occurs when two objects of different temperatures are in direct contact is called _____.
A. Conduction C. Convection
B. Radiation D. Insulation
_______4. Heat always move from places of high temperature to places ___.
A. of higher temperature C. with the same temperature
B. of lower temperature D. none of these
_____ 5. One cold morning, you stand barefoot on a cement floor and your feet feel cold because
A. heat from the floor flows to the feet.
B. heat from the feet flows through the floor
C. the temperature of the feet is the same as the floor
D. the temperature of the floor is higher than that of the feet
_____6. Which of the following properties must a substance have so that convection can take place?
A. It must be a solid.
B. It must be a good electrolyte.
C. It must be a good conductor of heat.
D. Its density must change with temperature.
_____7. Body A has a higher temperature than Body B. When they are placed in contact, the heat flow from A to B _____.
A. only if both are fluids
B. only if A is on top of B
C. only if A has greater heat content
D. until both have the same temperature
_____8. How does the heat energy reach the Earth from the Sun?
A. by radiation C. by convection
B. by conduction D. by insulation
_____9. We wear white clothes especially during the summer months beacause white _____.
A. absorbs heat C. disperse heat
B. reflects heat D. refracts heat
_____10. Which of the following statements pertaining to a vacuum flask (thermos) is not correct
A. Silvering reduces radiation loss
B. Vacuum reduces radiation loss
C. Vacuum reduces conduction loss
D. Vacuum reduces convection loss
____11. Heat energy always moves from a _______ place to a ______ place
A. hotter, hotter C. colder, colder B. colder, hotter D. hotter, colder
_____12. The transfer of energy through matter from molecule to molecule and occurs when two objects of different temperatures are in direct contact is called ____________.
A. conduction C. convection B. radiation D. Insulation
_____13. Energy is transferred by the movement of fluids brought about by temperature differences. Heated fluids tend to rise while cooler fluids sink. This mode of heat transfer is called____________.
A. conduction C. convection B. radiation D. insulation

_____14. When you touch a piece of ice with your finger, heat energy flows _____________.
A. From your finger to the ice C. From the ice to the finger
B. Both ways D. Heat energy does not flow
The illustration below shows a lady making a noodle soup using a pan made of metal. Use this illustration to answer the questions 12-13.

_____12. How does heat travel through the pan?
A. by radiation C. by convection B. by dispersion D. by conduction
_____13. In what direction does heat travel through the soup?
A. from top to bottom C. both A and B
B. from bottom to top D. neither A nor B
_____14. In a natural convection, why does heated portion of fliuds move?
A. Its molecular motions become alligned.
B. due to the currents in the surrounding fluids
C. due to the molecular collisions within the heated portion
D. heated portion’s density is less than that of the surrounding fluid
_____15. Which of the following situations is heat transferred through conduction?
A. The spoon becomes hotter when placed in a glass of hot water.
B. The sun heats the surface of the bodies of water
C. Meat is roasted over the burning charcoal
D. Warm air rises as the cold air sinks
_____16. When you put your hand above a lighted candle, your hand feels the warm air. But when you put your hand at the side of the lighted candle, you did not feel so warm. What is an explanation for this observation?
A. hot air is heavier and rises C. hot air is lighter and rises
B. hot air is heavier and sinks D. hot air is lighter and sinks
_____17. When you touch a piece of ice with your finger, how does heat energy flows?
A. from your finger to the ice C. in both ways
B. from the ice to your finger D. energy does not flow
_____18. Which method of heat transfer operates in a refrigerator?
A. conduction C. radiation
B. convection D. insulation
_____19. Energy is transfered by the movement of fluids brought about by temperature diferrences. Heated fluids tends to rise while cooler fluids sink. This mode of heat transfer is called_____.
A. conduction C. radiation
B. convection D. insulation
_____20. If you ​