1. How is the volume of an irregular solid measured?
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Chapter 7: Density and Temperature + Chapter 8: Magnetism
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2. Magnetic field lines always emerge from:
3. Khalid is studying temporary magnets. He knows that temporary magnets lose their magnetism when the external magnetic field is removed. Which of the following is an example of a temporary magnet?
4. Which is an example of plasma?
5. Oliver is studying types of magnetic materials. He learns that some materials are repelled by a magnet. What are these materials called?
6. In an unmagnetized material, magnetic domains are:
7. Which magnet loses its magnetism easily?
8. Domain theory explains magnetism due to:
9. Which of the following is a use of permanent magnets?
10. Which material is commonly used for magnetic shielding?
11. Ming is studying paramagnetic materials. He knows that paramagnetic materials have unpaired electrons. What happens to the alignment of atomic dipoles in a paramagnetic material when an external magnetic field is applied?
12. Omar is studying the sensitivity of a thermometer. He learns that sensitivity is the ability to detect small temperature changes. Which of the following increases the sensitivity of a liquid-in-glass thermometer?
13. 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?
14. Victor is studying the magnetic field of a bar magnet. He uses a compass to trace the magnetic field lines. What is the shape of the magnetic field lines of a bar magnet?
15. Julia is studying temporary magnets. She knows that temporary magnets are used in relays. What is the function of a relay?
16. Qasim is studying the linearity of a thermometer. He understands that linearity means the thermometer gives a straight-line response to temperature changes. Which type of glass is best for linearity?
17. An electromagnet works on the principle of:
18. Fatima is studying magnetic shielding. She knows that magnetic shielding is used to protect sensitive instruments from magnetic fields. What material is commonly used for magnetic shielding?
19. Calibration of thermometer means:
20. Paula is learning about the range of a thermometer. She understands that range refers to the minimum and maximum temperatures a thermometer can measure. Which factor affects the range of a liquid-in-glass thermometer?
21. Samir is studying thermocouple thermometers. He learns that thermocouples are made from two different metals. What is the principle behind a thermocouple?
22. 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?
23. Zayn is learning about measuring densities of regular objects. He knows that the volume of a regular object can be calculated. What is the formula for the volume of a cube?
24. Carlos is studying internal energy. He learns that internal energy can be changed by doing work or heating. What happens to the internal energy of a gas when it is compressed?
25. Rachel is studying the difference between magnetic and non-magnetic materials. She knows that non-magnetic materials are not attracted to magnets. Which of the following is a non-magnetic material?
26. David is studying the direction of the magnetic field at a point. He knows that the direction of the magnetic field is the direction a north pole would move. Outside a bar magnet, what is the direction of the magnetic field lines?
27. Diana is learning about the expansion of liquids. She understands that liquids expand more than solids. Why do liquids expand more?
28. 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?
29. Fatima is studying biomagnetism. She knows that some bacteria contain magnetosomes that help them navigate. What are magnetosomes?
30. Ahmed is studying the uses of permanent magnets. He knows that permanent magnets are used in compasses. What is the role of the magnet in a compass?