Measurement and MatterIB MYP Physics: Topic test

20 questions, 54 marks

IB MYP Physics

Measurement and Matter topic test

Total 54 marks

Name

Class

Date

1
A nurse in Manila prepares a medicine dose of 250 mg for a child. She also sets up a saline drip containing 0.5 L of liquid.
(a)
What is the dose in grams?
[1 mark]
A0.025 g
B0.25 g
C2.5 g
D250 000 g
(b)
What is the volume of the saline in cm³?
[1 mark]
A0.5 cm³
B5 cm³
C500 cm³
D5000 cm³
(c)
She measures a volume of liquid in a measuring cylinder. State two things she should do to read the scale accurately.
[2 marks]
Total for question 1: 4 marks
2
A perfumer in Grasse, France, opens a bottle of liquid perfume at one end of a still room. After about a minute, people at the far end of the room can smell it.
(a)
What name is given to the net movement of the perfume particles from where there are many to where there are few, through the air?
[1 mark]
ADiffusion
BCondensation
CSublimation
DFreezing
(b)
The perfume is a liquid in the bottle. Which change of state lets its particles enter the air as a gas?
[1 mark]
ACondensation
BFreezing
CSublimation
DEvaporation
(c)
Explain why diffusion is much faster in a gas than in a liquid.
[2 marks]
Total for question 2: 4 marks
3
A sealed, rigid steel cylinder of nitrogen gas in a factory in Ankara is moved from a store at 27 °C to a furnace room, where it reaches 127 °C. The volume of the cylinder does not change.
(a)
Convert both temperatures to kelvin, and state what happens to the average kinetic energy of the gas particles.
[3 marks]
(b)
Explain, using the particle model, why the pressure of the gas in the cylinder increases.
[4 marks]
Total for question 3: 7 marks
4
A food inspector in Chennai tests a liquid sold as pure olive oil, which should have a density of 0.91 g/cm³. She places an empty measuring cylinder on a balance and reads 120.0 g. She pours in 100 cm³ of the liquid and the balance now reads 205.0 g. She repeats the whole test with two fresh samples and calculates densities of 0.86 g/cm³ and 0.85 g/cm³.
(a)
Calculate the density of the liquid from her first test, and state, with a reason, whether this result suggests that the liquid is pure olive oil.
[6 marks]
(b)
Evaluate how far the inspector's three results support the conclusion that the liquid is not pure olive oil. Suggest one improvement to her method.
[6 marks]
Total for question 4: 12 marks
5
A chip designer in Hsinchu, Taiwan, describes a transistor that is 45 nm wide, in a processor that runs at a frequency of 3 GHz.
(a)
What is the width of the transistor in metres?
[1 mark]
A4.5 × 10⁻⁶ m
B4.5 × 10⁻⁷ m
C4.5 × 10⁻⁸ m
D4.5 × 10⁻⁹ m
(b)
What is the frequency of the processor in hertz?
[1 mark]
A3 × 10⁹ Hz
B3 × 10⁶ Hz
C3 × 10³ Hz
D3 × 10⁻⁹ Hz
(c)
Hertz (Hz) is the unit of frequency. State whether it is an SI base unit or a derived unit, and give a reason.
[2 marks]
Total for question 5: 4 marks
6
A catering company in Mexico City packs ice cream in boxes with blocks of solid carbon dioxide (dry ice). In warm air a block gets smaller and smaller, but no liquid ever forms.
(a)
Which change of state is happening to the block?
[1 mark]
AMelting
BSublimation
CCondensation
DFreezing
(b)
Which statement describes the particles in the carbon dioxide gas that forms?
[1 mark]
AClose together in a regular pattern, vibrating about fixed positions
BClose together, sliding past one another
CFar apart, vibrating about fixed positions
DFar apart, moving randomly at high speed
(c)
Describe how the movement and the spacing of the carbon dioxide particles change as the solid becomes a gas.
[2 marks]
Total for question 6: 4 marks
7
A marine scientist in the Red Sea releases a small air bubble at a depth where its pressure is 300 kPa and its volume is 2.0 cm³. The pressure of the air in the bubble always equals the water pressure around it. The temperature stays constant as the bubble rises to the surface, where the pressure is 100 kPa.
(a)
Calculate the volume of the bubble when it reaches the surface.
[3 marks]
(b)
Explain, in terms of particles, why the pressure inside the bubble falls as it expands, even though it contains the same number of particles.
[4 marks]
Total for question 7: 7 marks
8
A hot-air balloon company in Cappadocia, Turkey, flies balloons in cool morning air of density 1.2 kg/m³. Each balloon envelope holds 2800 m³ of air. When the burner heats the air inside to 100 °C, its density falls to 0.95 kg/m³. The fabric, basket, burner, fuel and passengers have a total mass of 640 kg.
(a)
Explain, using ideas about particles and density, why heating the air makes the balloon rise.
[6 marks]
(b)
Calculate whether the balloon will lift off. Show your working and state your conclusion.
[6 marks]
Total for question 8: 12 marks

End of questions

Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).