petroglyphs

1
petroglyphs

• use context clues
• All over the southwest are many such figures
  called petroglyphs.

petroglyphs- useful carvings in rock
2
space probe

• The Voyager space probe is the fastest vehicle
  created by man
• Space probe spacecraft sent out to explore
  other planets

3
shepherd satellites

• use context clues
• Jupiter has many shepherd satellites

shepherd satellites tiny moons that orbit
rapidly around a planet
4
retrograde

• use context clues
• The moons orbit is not retrograde to the rotation
  of the earth

retrograde moving in the opposite direction.
5
gravitational attraction

• use context clues
• The earth is kept on track by the suns
  gravitational attraction

gravitiational attraction a force that pulls
two free bodies toward eachother
gravitational attraction a force that pulls two
free bodies toward each other