Exampro GCSE Physics. P1 Foundation - BBT, Doppler and Redshift Self Study Questions. Name: Class: Author: Date: Time: 40. Marks: PDF

Please download to get full document.

View again

of 19
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Information Report
Category:

Study Guides, Notes, & Quizzes

Published:

Views: 329 | Pages: 19

Extension: PDF | Download: 0

Share
Related documents
Description
Exampro GCSE Physics P Foundation - BBT, Doppler and Redshift Self Study Questions Name: Class: Author: Date: Time: 40 Marks: 40 Comments: Page of 9 Q. Scientists have observed that the wavelengths of
Transcript
Exampro GCSE Physics P Foundation - BBT, Doppler and Redshift Self Study Questions Name: Class: Author: Date: Time: 40 Marks: 40 Comments: Page of 9 Q. Scientists have observed that the wavelengths of the light given out from galaxies that are moving away from the Earth are longer than expected. (a) (i) What name is given to this observation? () Draw a ring around the correct answer to complete the following sentence. shrinking. This observation gives evidence for the idea that the Universe is not changing. expanding. () Page 2 of 9 (b) The graph shows that there is a link between the speed at which a galaxy moves away from the Earth and the distance of the galaxy from the Earth. The positions of three galaxies, A, B and C, are marked on the graph. From which galaxy, A, B or C, would the wavelength of the light reaching the Earth seem to have changed the most? Galaxy... Give a reason for your answer (2) (Total 4 marks) Q2. (a) Scientists have observed that the wavelengths of the light from galaxies moving away from the Earth are longer than expected. (i) What name is given to this observation? () Draw a ring around the correct answer to complete each sentence. light can be stretched. This observation gives scientists evidence that galaxies are changing colour. the Universe is expanding. () Page 3 of 9 (iii) There is a pattern linking the size of the observed increase in the wavelengths of light from a galaxy and the distance the galaxy is from the Earth. Which one of the graphs, L, M or N, shows the correct pattern? Write the correct answer in the box. () (b) Observations help scientists answer questions about the Universe. Scientists cannot answer every question. Which one of the following questions cannot be answered by scientists? Tick ( ) one box. How old is the Universe? Why was the Universe created? How fast does light travel through the Universe? () (Total 4 marks) Page 4 of 9 Q3. The diagram shows a teacher using a loudspeaker to demonstrate an important effect. The loudspeaker produces a note of constant frequency and is swung around in a circle. (a) As the loudspeaker moves towards the students, the frequency of the note heard by the students increases. What happens to the note heard by the students as the loudspeaker moves away from them? () (b) The teacher is using the demonstration to model the red-shift in light observed from most distant galaxies. (i) Which part of the demonstration: represents a moving galaxy? is like the red-shift? (2) Page 5 of 9 Which one of the following statements gives the main reason why models are used in science? Put a tick ( ) in the box next to your answer. Models can help to explain an effect or theory. Models can prove that a theory is correct. Models can prove that a theory is wrong. () (c) Red-shift provides evidence to support the theory that the Universe began from a very small initial point. What name is given to this theory?... () (Total 5 marks) Q4. A school is near a busy road. A car travels past the school at high speed. Photograph supplied by Design Pics/Thinkstock The students notice that the sound of the car engine seems to change as the car travels past the school. A teacher says that this is an example of the Doppler effect. The students decide to study the sound they hear from passing cars. (a) (i) Give one risk the students should consider when doing their study. () Page 6 of 9 As a car travels towards the students, the frequency of the sound the students hear is different to the frequency of the sound they would hear if the car was stationary. Draw a ring around the correct answer in the box to complete the sentence. decreased. Compared to the sound from the stationary car, the frequency has increased. become quieter. () (b) In the same way as the sound from the car engine changes, the light from most galaxies also seems to have a change in observed frequency. This is called red-shift. (i) The diagram shows four galaxies, P, Q, R and S. The arrows show the direction the galaxies are moving relative to the Earth. Which one of the galaxies is moving the fastest? Write the correct answer in the box. Which one of the galaxies will produce the biggest red-shift? Write the correct answer in the box. (2) Most scientists support a theory that the Universe began from a very small initial point. Red-shift can be used as evidence for this theory. What name is given to the theory that the Universe began from a very small initial point?... () Page 7 of 9 (iii) Cosmic microwave background radiation (CMBR) provides more evidence for this theory. CMBR is detected coming from space. Where does CMBR come from? Tick ( ) one box. CMBR only comes from near the Sun. CMBR comes from all parts of the Universe. CMBR only comes from the Moon. () (iv) Which statement gives the reason why most scientists support the theory that the Universe began from a very small initial point? Tick ( ) one box. The evidence proves it happened. There is no other way of explaining how the Universe began. At the moment it is the best way of explaining our scientific knowledge. () (Total 7 marks) Page 8 of 9 Q5. The big bang theory is one theory explaining the origin of the Universe. (a) The graphs X, Y and Z, show how the size of the Universe may have changed with time. Which graph would the big bang theory suggest is correct? Write your answer, X, Y or Z, in the box. Explain the reason for your answer (3) (b) In 948, an alternative to the big bang theory, called the steady state theory, was developed. The steady state theory suggested that the Universe, although expanding, has always existed without a beginning in time. (i) Complete the following sentence by drawing a ring around the correct line in the box. The measurement of red-shift in the light from distant galaxies provides evidence only the big bang theory. to support only the steady state theory. both the big bang and steady state theories. () Page 9 of 9 In 965, scientists rejected the steady stat theory in favour of the big bang theory. Suggest what might cause scientists to stop supporting one theory and to start supporting an alternative theory. () (Total 5 marks) Q6. (a) Scientists use telescopes to observe stars and galaxies. Some telescopes are on Earth, but some are on satellites in space. Why do telescopes in space give better images than telescopes on the Earth? () (b) Scientists have observed that the wavelengths of the light given out from galaxies that are moving away from the Earth are longer than expected. (i) What name is given to this observation? Put a tick ( ) in the box next to your answer. blue-shift green-shift red-shift () Complete the following sentence by drawing a ring around the correct line in the box. shrinking. This observation gives evidence for the idea that the universe is not changing. expanding. () Page 0 of 9 (c) Use the graph to answer the following questions. (i) What is the link between the speed that a galaxy moves away from the Earth and the distance between the galaxy and the Earth? () The positions of three galaxies, A, B and C, are marked on the graph. From which galaxy, A, B or C, would the wavelength of the light reaching the Earth seem to have changed the most? Give a reason for your answer. Galaxy... (2) (Total 6 marks) Page of 9 Q7. The diagram shows a teacher using a loudspeaker to demonstrate an important effect. The loudspeaker, which produces a note of constant frequency, is swung around in a circle. (a) As the loudspeaker moves towards the students, the frequency of the note heard by the students increases. What happens to the note heard by the students as the loudspeaker moves away from them? () (b) The teacher is using the demonstration to model the red-shift in light that is observed from most distant galaxies. (i) Which one of the following statements gives the main reason why models are used in science? Put a tick ( ) in the box next to your answer. Models can help to explain an effect or theory. Models can prove that a theory is correct. Models can help to generate new ideas. () Page 2 of 9 Explain how this demonstration can be used as a model for red-shift. (2) (c) Red-shift provides evidence to support the theory that the Universe began from a very small initial point. What name is given to this theory?... () (Total 5 marks) Q8. Light is given out by the Sun and a distant galaxy. (a) Compared to the light from the Sun, the light from the distant galaxy has moved towards the red end of the spectrum. (i) What name is given to this effect?... () Complete the following sentence by drawing a ring around the line in the box that is correct. The fact that light from a distant galaxy seems to move towards the red end of the spectrum gives scientists evidence that galaxies are shrinking galaxies are changing colour the universe is expanding () (b) Scientists have a theory that the universe began from a very small point and then exploded outwards. (i) What name is given to this theory?... () Page 3 of 9 Which statement gives a reason why scientists think that the universe began with an explosion? Put a tick ( ) in the box next to your choice. At the moment it is the best way of explaining our scientific knowledge. It can be proved using equations. People felt the explosion. () (Total 4 marks) Page 4 of 9 M. (a) (i) red-shift expanding (b) C it is furthest from the Earth or it is furthest away or it has the largest red-shift or it is moving (away) the fastest only score if C is chosen [4] M2. (a) (i) red-shift accept Doppler (effect) the Universe is expanding (iii) N (b) Why was the Universe created? [4] M3. (a) frequency / pitch decreases accept wavelength increases accept it / the note becomes deeper / lower it / the note decreases is insufficient quieter is neutral (b) (i) (moving) loudspeaker change in sound as loudspeaker moves away models can help to explain an effect or theory Page 5 of 9 (c) big bang [5] M4. (a) (i) any suitable risk eg being injured by a car accept a measure to reduce the risk eg stand well away from edge of pavement stay on school grounds / don t go onto the street be aware of the dangers of traffic car travelling at high speed is insufficient increased (b) (i) S S big bang (theory) (iii) CMBR comes from all parts of the Universe (iv) At the moment it is the best way of explaining our scientific knowledge [7] M5. (a) Y accept cannot be X as size is increasing shows Universe expanding this scores if Y or Z is chosen accept exploding outwards from a (very small) point this only scores if Y is chosen accept from zero (size) answers in terms of planets negate the last two mark points (b) (i) both the big bang and steady state theories Page 6 of 9 (new) evidence that supports / disproves a theory accept proves for supports or (new) evidence not supported by current theory accept there may be more evidence supporting one (theory) than the other (theory) accept new evidence specific to this question eg measurement of CBR or some types of star only found in distant parts of Universe (steady state suggests should be same throughout Universe) [5] M6. (a) any one from: above the atmosphere accept no atmospheric pollution no clouds in the way no light pollution answers in terms of being closer to space negate answers in terms of looking at the Earth negate (b) (i) red-shift expanding (c) (i) as one gets bigger the other gets bigger accept (directly) proportional accept positive correlation C it is furthest from the Earth only scores if C is chosen or it is furthest away or has the largest red-shift or it is moving (away) the fastest [6] Page 7 of 9 M7. (a) frequency / pitch decreases accept wavelength increases accept it / the note becomes deeper / lower it / the note decreases is insufficient quieter is neutral (b) (i) Models can help to explain an effect or theory. (moving) loudspeaker represents the (moving) galaxy accept sound waves represent light waves the decrease in frequency of the sound is like red-shift accept increase in frequency is like blue-shift accept answers in terms of wavelength change accept sound going away from you is like red-shift accept red-shift happens when galaxies / stars move away (from Earth) this accept only scores if first marking point scores (c) big bang [5] M8. (a) (i) red shift accept Doppler effect the universe is expanding (b) (i) big bang at the moment it is the best way of explaining... [4] Page 8 of 9 Page 9 of 9
Recommended
View more...
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks