1.1-1.2 Sky & Earth
Earth moves in 2 major ways: ____________ and ____________
Rotation & Revolution
What is gravity?
The attractive force between 2 objects; the force that makes objects fall
What is a tide?
The rise and fall of Earth's oceans
Rocket technology came from what country?
China
The space race was between what 2 nations?
United States & Soviet Union/Russia
The motion of objects in the sky is actually the movement of ____________
Earth
A force is a __________ or ___________
Push or pull
The changing positions of the _________, ________, and __________ determine the phases of the moon
Earth, moon, sun
Velocity is speed and ____________?
Direction
Why were space shuttles retired?
They were too risky; there were 2 tragic accidents: Challenger (1986) and Columbia (2003)
What is the difference between revolution & rotation?
Revolution is Earth's trip around the sun and rotation is Earth spinning on its axis
how are mass and weight different? (Which one is determined by gravity?
Mass is how much matter is in an object. Weight is a measure of how much gravity is acting on you.
Where do scientists think the moon came from? (Collision-Ring Theory)
Billions of years ago, a planet-like object collided with Earth. Pieces of that object and Earth flew into space. These objects formed a ring around Earth because of gravity. Over time gravity pulled the objects together and rounded them into the moon.
How does a rocket move?
A rocket moves forward when gases shooting out the back of the rocket push it in the opposite direction
___________ _____________ are a place for scientists to perform experiments in space.
Space stations
In what 2 months do solstices ocur?
June & December
Strength of gravity depends on mass and _____________
Distance
The dark spots on the moon are called what?
Maria
The velocity an object must reach to fly beyond a planet's or moon's gravitational pull
Escape Velocity
What does a space probe do?
Goes out into space and collects data to send back to Earth
In what 2 months do equinoxes occur?
March & September
_________ and inertia stop Earth from flying into space or crashing into the sun.
Gravity
A __________ tide has the highest high tide and the lowest low tide.
The reaction force that propels a rocket forward
Thrust
What are 2 things that a space shuttle does?
1.) Take satellites into orbit
2.) Repair damaged satellites
3.) Carry astronauts to and from space