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Head For the Hills!

 

Gravity is always working, pulling things down toward the Earth. Gravity changes the speed of objects too.

When you ride your bike, gravity makes it easy to go downhill. The steeper the hill, the faster you go. Gravity also makes it hard to go uphill. You pedal and pedal, but gravity pulls you downwards.

 
The steepness of a hill is called incline. Test your understanding of how gravity and incline affect a moving object’s speed.
 
Incline 1
Incline 2

Which incline is easier to get up? Incline 1 or Incline 2

Which incline is easier to get down? Incline 1 or Incline 2

Which incline is harder to get up? Incline 1 or Incline 2

Which incline harder to get down? Incline 1 or Incline 2

 

Rolling Along

Look at the three pictures.

 
Choose the picture in which you would expect the ball to be traveling fastest when it reaches the bottom of the hill. Click on the picture you think is correct.
 
Gravity makes rolling an object up a steep hill hard work! Going downhill is easy!
 
 
EarthMoonImage
LivingOrNotLivingImage
ForceMotionImage
GravityImage
HeatAndEnergyImage

Download the plug-ins: Get Adobe Acrobat Reader, and Get Quicktime Player. (The QuickTime plug-in is needed to play sounds and movies correctly.)

Want to share photos of you or your friends doing this activity? Send it in an e-mail with the following information:

  1. The title of the activity
  2. The URL (Internet address)
  3. Your name.

Remember that no pictures can be used that show student faces or student names on it. 

Teachers should view the Teacher Site Map to relate Sci-ber text and the USOE 3rd grade science core.


Updated October 24, 2008 by: Glen Westbroek

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