Answer:an earthquake 
Explanation:an earthquake is a violent shaking of the ground and it also creates greate destruction
 
        
             
        
        
        
Answer:
At 0hr it was 200 bacteria 
At 1 hr it doubled and was 400
Means: at every 1 hr the population of the bacteria doubles
400 bacteria = 1hr
2000 bacteria = X
X = 2000 × 1 / 400
X = 5 hrs
 
        
             
        
        
        
The pericardial cavity separates the parietal and visceral pericardium 
        
             
        
        
        
Troposphere 
Stratosphere 
Mesosphere
Thermosphere 
Exosphere
        
             
        
        
        
<span>Facilitated Diffusion- 
Does not use energy. Membranes in the cell membrane pick up molecules & carry them across the membrane from high to low concentration</span>