Chapter 7: Density and Temperature

2. Hina is learning about fixed points in thermometer calibration. She understands that the lower fixed point is the melting point of ice. At what temperature does ice melt at standard atmospheric pressure?

3. Which state of matter has particles very close together?

4. George is studying internal energy and temperature of a substance. He learns that internal energy is the total energy of particles in a substance. What is the internal energy of an object related to?

5. Bongani is learning about the relationship between particle motion and temperature. He understands that at absolute zero, particle motion stops. What is absolute zero in Kelvin?

6. Calibration of thermometer means:

7. Nadia is learning about the effects of the size of the bulb on the sensitivity of a thermometer. She understands that a smaller bulb makes it more sensitive. Why is a smaller bulb more sensitive?

8. What is density?

9. Ibrahim is studying the expansion of liquids. He learns that liquids expand when heated. What happens to the density of a liquid when it is heated?

10. Why is mercury suitable for thermometers?

11. Tina is learning about variation in physical properties as a tool for measuring temperature. She understands that color change can be used. Which of the following changes color with temperature?

12. Bilal is learning about measuring densities. He knows that the density of a regular-shaped object can be found by measuring its mass and volume. Which instrument is used to measure the mass of an object?

13. What is the SI unit of density?

14. Julia is learning about variation of volume and pressure. She understands that for a gas, volume and pressure are related. According to Boyle's law, what happens to the pressure of a gas if its volume is decreased at constant temperature?

15. Chloe is studying how to find the density of an irregular-shaped object. She learns that the volume of an irregular object can be found using the water displacement method. What is this method called?

16. Diana is learning about the expansion of liquids. She understands that liquids expand more than solids. Why do liquids expand more?

17. Which state of matter has no fixed volume?

18. According to particle model, particles of matter are:

19. Mohamed is studying the bimetallic strip thermometer. He learns that a bimetallic strip consists of two different metals with different coefficients of expansion. What happens to a bimetallic strip when heated?

20. What is plasma?

21. Upper fixed point of a Celsius thermometer is:

22. Fatima is learning about resistance thermometers. She understands that they are used for precise measurements. Which material is commonly used in resistance thermometers?

23. Khalid is studying the variation in color of crystals with temperature. He learns that some crystals change color when heated. Which of the following is an example of a thermochromic material?

24. Particle model of matter explains:

25. Khalid is studying the linearity of thermometers. He understands that linearity is important for accurate readings. Which of the following affects the linearity of a liquid-in-glass thermometer?

26. Nadia is learning about fixed points in the calibration of thermometers. She understands that fixed points are reproducible temperatures. Which of the following is a fixed point?

27. David is learning about the states of matter. He understands that matter exists in different states. Which of the following is NOT a state of matter?

28. Xia is learning about the bimetallic strip thermometer. She understands that the bending of the strip is due to differential expansion. Which metal expands more when heated?

29. Usman is studying the expansion of liquids. He understands that the expansion of a liquid is used in thermometers. What happens if a liquid has a very low coefficient of expansion?

30. Waleed is studying resistance thermometers. He learns that platinum resistance thermometers are very accurate. Why is platinum used?