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Science PT
Stack #196529
Question | Answer |
---|---|
hard outer layer of the earth {crust} | lithosphere |
the lithosphere is broken into large pieces called | plates |
what is cracked like an eggshell | lithosphere |
litho means | rock |
earth's rocky outer shell consists of broken pieces that fit together like a | jigsaw puzzle |
boundries between broken pieces of the lithospere or crust | plates |
there are _ major plates and _ minor plates | 7 major and 13 minor |
a dividing line | boundary |
the _________ between the plates are cracks in earth's crust | boundries |
according to thier explanation, known as the theory of plate tectonics, earth's plates move ever so slowly in _________ directions | various |
educated guess | hypothesis |
some clues have been found to prove the hypothesis | theory |
all clues have been proven to facts | law |
what three things do plates sometimes do | pull away, push toward, or slde past eachother |
plate ______ divide one plate from another | boundries |
how many main types of plate boundries are there | 3 |
1 _______ boundary- slipping past Ex. San Andrea Fault | transform |
2 _______ boundary- pulling apart Ex. Mid Atlantic Ridge | divergent |
3 ______ boundary- colliding Ex. Himalayas | convergent |
the speed at which earth's _____ move is very slow indeed | plates |
some small plates can move as much as several ______ per year, whereas others move only a few _______ per year | centimeters millimeters |
speed = | distance over time |
distance = | speed x time |
in everday language, acceleration means? | speeding up |
the rate at which velocity changes | aceleration |
speed and direction of an object | velocity |
1 part or unit of a system | component |
what involves any change in speed or direction | aceleration |
in science, _______, refers to increasing speed, decreasing speed, or changing direction | acceleration |
_______ in which speed decreases is also considered accelerationin science | motion |
this change in speed is sometimes called deceleration, or _______ acceleration | negative |
an object can be accelerating even if its speed is _______ | constant |
the car will be accelerating if it follows _________ in the road or ___________ | gentle curve changes lanes |
many objects continuosly change direction without changing _______ | speed |
the simplest example of this type of motion is what | circular motion |
example of circular motion? | mferris wheel and the moon |
to determine the acceleration of an object, you must calculate the change in _____ during each unit of time | velocity |
acceleration = | final velocity - initial velocityover time |
begining or start of something | initial |
units of measure for _______ is determined by the length and time used Ex. meters and seconds = m/s2 kilometer and hours = km/h2 cm and seconds = cm/s2 | acceleration |