Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
helium |
it is lighter than air |
|
|
lighter- than air |
Hot air balloons/helium |
|
|
stationary |
not moving |
|
|
qravity |
it holds you to the ground |
|
|
aerodynamic |
a shape of sumting that lets air go by it |
|
|
propulsion |
push is it forwards |
|
|
aircraft |
a airplane is a aircraft |
|
|
spacecraft |
a rocket |
|
|
expansion |
some that expads |
|
|
contraction |
macks it smaller |
