1.Falling objects are pulled down to the ground by             .
A.gravity     B.resistance  C.speed D.a(chǎn)cceleration(加速度)
2.Why do people make parachutes(降落傘)?
A.To look pretty and colourful in the air.   B.To slow down the falling speed.
C.To push against the air in the sky.   D.To accelerate the falling movement.
3.Which did Galileo discover?
A.A heavy ball falls faster than a light ball.      B.A light ball falls faster than a heavy ball.
C.A light ball and a heavy ball fall at the same speed.
D.A light ball and a heavy ball fall at different speed.
4.Which of the following is NOT true according to the passage?
A.Heavy and light objects fall equally when they are different in size.
B.When air resistance equals gravity, objects fall at terminal speed.
C.Without air; all falling objects get faster and faster at the same rate.
D.Slippers(拖鞋) and boots (靴子)fall at the same speed because they have the same shape

小題1:A
小題2:B
小題3:C
小題4:A
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TEENSGIVING in SPRING 2010

Frequently Asked Questions
What is TEENSGIVING?
TEENSGIVING is an exciting event where hundreds of New York City teens gather together annually for a remarkable day of community service. This year, TEENSGIVING in SPRING 2010 participants will once again better New York City and impact thousands of lives!
When is TEENSGIVING in SPRING 2010?
SUNDAY, APRIL 25, 2010
Where is TEENSGIVING?
All over New York City. Everyone will meet at the 92nd Street Y (92nd and Lexington) at 9:00 AM for the event kick-off. Then, all TEENSGIVING volunteers will disperse across the city to work with our partnering agencies where they will make a HUGE difference (and have fun!).  
Who participates in TEENSGIVING?
Hundreds of teenagers from around the city. Teens come from the 92nd Street Y, various city schools, youth groups, and organizations in the area. In addition, many adult volunteers (ages 21 and older) will donate their time to TEENSGIVING in SPRING 2010.
What projects do participants do at the agencies?
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Do I get anything for participating in TEENSGIVING?
Yes! Everybody benefits! Teen volunteers will receive *6 hours* of community service credit, good towards honor society, high school graduation and college application requirements. Adult volunteers will be “thanked” with a light breakfast, a gift certificate for their troubles, and the satisfaction of helping our city’s youth contribute to their community. In addition, all teen and adult volunteers will receive a cool TEENSGIVING in SPRING 2010 T-shirt.
This sounds awesome! How do I register for TEENSGIVING in SPRING 2010?
Interested teens and/or adults should e-mail the TEENSGIVING Coordinator Josh Hyman at jhyman@92Y.org (subject: TEENSGIVING) to receive more information and to register for this fantastic event!   
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