1. First Name: _______________ Last Name: _______________ Student #: _______________
Group: _______________ Week: _______________
Unit 3
Solar Sails
PARAGRAPH 1 : A problem scientists have when designing spacecraft...
What are the 5 choices available to scientists right now for producing power for spacecraft?
PARAGRAPH 2 : However, all of these energy sources have disadvantages...
What is the disadvantage of rockets and batteries?
What happens when solar panels travel away from the sun?
What is the problem with nuclear energy?
What is the problem with fuel cells?
PARAGRAPH 3: For this reason, space scientists are researching new ways...
Are solar sails big or small?
Are solar sails heavy or light?
What happens when light is reflected off of the sail?
Where would the light for the solar sail come from?

2. PARAGRAPH 4 : Satellites in orbit around the Earth can survive for many...
Do satellites use a large amount of fuel?
In what way are satellites and solar sails similar?
Which could stay in space longer; a satellite or a solar sail?
PARAGRAPH 5 : To produce enough power to move even a small...
Would a solar sail probably be bigger or smaller than our classroom?
Is there a lot of fricton in space?
PARAGRAPH 6 : In the future, it is possible that astronauts will be able to...
Why would it be difficult to go to Mars in a rocket-powered spacecraft?
Which could survive in space longer (without maintenance); a rocket-powered spacecraft or a solar sail?

3. 1. spacecraft__________
2. fuel cells__________
3. energy sources__________
4. disadvantages__________ a) k)
5. dangerous__________ b) l)
6. heavy__________
c) m)
7. space__________
8. research__________ d) n)
9. lightweight __________ e) o)
10. mirror__________
11. attached to__________ f) p)
12. reflected __________ g) q)
13. satellite__________
h) r)
14. orbit__________
15. survive__________ i) s)
16. maintenance__________
j) t)
17. sunlight __________
18. distance__________
19. friction__________
20. journey__________
In the future, it is possible that astronauts will be able to fly a solar sail on long journeys through space.
In the future, it is possible that ________________ will be able to _________________________________________________.
In the future, it is possible that ________________ will be able to _________________________________________________.
In the future, it is possible that ________________ will be able to _________________________________________________.
In the future, it is possible that ________________ will be able to _________________________________________________.

4. A square mirror one kilometer wide would be pushed by only about one kilogram of force.
ASKING ABOUT ANSWERING ABOUT
How wide is ____________________? ___________________ is ________________(centimeters/kilometers/etc..) wide.
What is the width of ___________________? The width of ______________ is ________(centimeters/kilometers/etc...).
1. Q: _______________________________________________________________________________________________________
A: _______________________________________________________________________________________________________
2. Q: _______________________________________________________________________________________________________
A: _______________________________________________________________________________________________________