1.
State what is meant by Stefan's law. [1]
JD SCIENCE
Astrophysics (option)
Answer all questions. Show working. Answers are in a separate file on the Worksheets page — do not look at them until you have finished.
2.
State what is meant by Wien's law. [1]
3.
State what is meant by Hertzsprung–Russell diagram. [1]
4.
State what is meant by parallax. [1]
5.
State what is meant by the Doppler effect for stars. [1]
6.
State what is meant by Hubble's law. [1]
7.
State what is meant by event horizon. [1]
8.
State what is meant by dark matter and dark energy (qualitative). [1]
9.
State what is meant by Kepler's third law. [1]
10.
State what is meant by a standard candle. [1]
11.
Amira is asked about Stefan's law in a AQA Physics paper.
(a) Describe Stefan's law. [2]
(b) Explain why Stefan's law is important in this topic. [3]
12.
Amira is asked about Wien's law in a AQA Physics paper.
(a) Describe Wien's law. [2]
(b) Explain why Wien's law is important in this topic. [3]
13.
Amira is asked about Hertzsprung–Russell diagram in a AQA Physics paper.
(a) Describe Hertzsprung–Russell diagram. [2]
(b) Explain why Hertzsprung–Russell diagram is important in this topic. [3]
14.
Amira is asked about parallax in a AQA Physics paper.
(a) Describe parallax. [2]
(b) Explain why parallax is important in this topic. [3]
15.
Amira is asked about the Doppler effect for stars in a AQA Physics paper.
(a) Describe the Doppler effect for stars. [2]
(b) Explain why the Doppler effect for stars is important in this topic. [3]
16.
Amira is asked about Hubble's law in a AQA Physics paper.
(a) Describe Hubble's law. [2]
(b) Explain why Hubble's law is important in this topic. [3]
17.
d=1/p. p=0.25″ [3]
18.
v=H₀d. H₀=70 km s⁻¹ Mpc⁻¹, d=10 Mpc [3]
19.
Wien: T if λmax=500 nm, constant=2.9×10⁻³ [3]
20.
Age ~ 1/H₀. If H₀=2.2×10⁻¹⁸ s⁻¹ [3]
21.
Inverse square: flux 4 times smaller. Distance [3]
22.
T² ∝ r³. If r×4, T increases by [3]
23.
Amira carries out a AQA-style required practical linked to astrophysics and the Newtonian world. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
24.
Amira carries out collecting valid data for astrophysics and the Newtonian world. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
25.
Amira carries out drawing a graph for astrophysics and the Newtonian world. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
26.
Amira carries out evaluating a method about astrophysics and the Newtonian world. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
27.
Compare Stefan's law with Wien's law. [4]
28.
Compare Wien's law with Hertzsprung–Russell diagram. [4]
29.
Compare Hertzsprung–Russell diagram with parallax. [4]
30.
Compare parallax with the Doppler effect for stars. [4]
31.
Apply your knowledge of event horizon to this situation: Rₛ = 2GM/c² [3]
32.
Apply your knowledge of dark matter and dark energy (qualitative) to this situation: not directly seen [3]