Forces
Q7 If forces on an object are unequal:
It must accelerate
Which statement describes an electrical circuit?
A continuous path that allows electrons to move
Q18 Least dense Earth layer
Crust
Warmer material rises
What happens to p-waves when they reach the outer core?
They bend entering a new layer
If one rightward force increases but the object must remain at rest, what must happen?
Increase the left-pulling force
Add another bulb in parallel
Future result of the East African Rift
Africa splits into land masses
Earthquakes and volcanoes
Which quantities have magnitude and direction?
Force and Velocity
A vector can show the __________ and ___________ of movement
Direction and magnitude
Why do bulbs in a series circuit dim as more are added?
Total resistance increases
Why do earthquakes release energy suddenly
Rocks store elastic energy until they snap
8. Which two locations are most likely to have strong future earthquakes?
Q13 Why might a plate slow after splitting?
More balanced forces on a smaller plate
How does a generator create electricity?
By moving a conductor through a magnetic field
If strongest quakes are near magnitude 8 what is true?
Strongest quakes were around 8
What causes seismic waves and what happens to P-waves as they enter new layers?
Earthquakes, speed changes with density
Convection currents cause
Plate movement
What does an electric field represent?
The area where a charge experiences force
Which seismograph detects waves last?