1. Heat is an energy transit that flows from _________________.
A. hot object to cold object C. hot object to hotter object
B. cold object to hot object D. cooler object to cool object
2. As the temperature of a substance increases, atoms and molecules move
_________________.
A. faster C. with medium speed
B. slower D. faster and then slower
3. What happens to the kinetic energy of atoms and molecules as the temperature
becomes lower?
A. increases C. decrease and then increase
B. decreases D. increases and then decreases
4. A security guard in a mall scanned the temperature of a girl using an infrared
thermometer. The registered temperature is 101 0F. If the normal body temperature
is below 37.50C, what does it show?
A. She has a fever. Her temperature is 38.3 0C.
B.She has a fever. Her temperature is 37.3 0C.
C.She does not have a fever. Her temperature is 38.3 0C.
D.She does not have a fever. Her temperature is 37.4 0C.
5. Which of the following statements is NOT true about heat?
A. Heat is expressed in terms of Joules or calories.
B.Heat is the average movement of molecules in a substance.
C. Heat pertains to the energy transferred when there is a difference in the
temperature of two bodies.
D.Heat is an energy that flows from substances with fast-moving molecules to other
substances with slow-moving molecules.
A. hot object to cold object C. hot object to hotter object
B. cold object to hot object D. cooler object to cool object
2. As the temperature of a substance increases, atoms and molecules move
_________________.
A. faster C. with medium speed
B. slower D. faster and then slower
3. What happens to the kinetic energy of atoms and molecules as the temperature
becomes lower?
A. increases C. decrease and then increase
B. decreases D. increases and then decreases
4. A security guard in a mall scanned the temperature of a girl using an infrared
thermometer. The registered temperature is 101 0F. If the normal body temperature
is below 37.50C, what does it show?
A. She has a fever. Her temperature is 38.3 0C.
B.She has a fever. Her temperature is 37.3 0C.
C.She does not have a fever. Her temperature is 38.3 0C.
D.She does not have a fever. Her temperature is 37.4 0C.
5. Which of the following statements is NOT true about heat?
A. Heat is expressed in terms of Joules or calories.
B.Heat is the average movement of molecules in a substance.
C. Heat pertains to the energy transferred when there is a difference in the
temperature of two bodies.
D.Heat is an energy that flows from substances with fast-moving molecules to other
substances with slow-moving molecules.
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Answer:
c.heat object to hotter object
Answer:
1. C.?
2. Slide 1. When matter gets warmer, the atoms or molecules in the matter move A. Faster. All matter—solid, liquid, and gas—is composed of continually jiggling atoms or molecules. Because of this random motion, the atoms and molecules in matter have kinetic energy
3.A,When we decrease the temperature, less heat energy is supplied to the atoms, and so their average kinetic energy decreases. When they enter a phase transition, such as freezing from a liquid to a solid, the temperature is not decreasing or increasing, and stays constant.
4. A
5 A
Explanation:
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