Science STAAR Review

Describe the movement of the box in between the two trucks pulling on it. 

• It moves to the left at an increasing speed. 
• It moves to the right at an increasing speed. 
• It moves to the left at a constant speed.
  
• It moves to the right at a constant speed. 

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Suppose you are riding a bicycle uphill and are pedaling at a constant speed. The force of your pedaling is equal to and opposite of: 

• the force of gravity
  
• the force of friction between the tires and the road 
• both the force of gravity and friction
  
• neither the force of gravity and friction 

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What is the net force acting on this balloon? 

• 7 N to the right 
• 10 N to the right 
• 6 N to the left
  
• 4 N to the right 

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During a football game, a quarterback passes a ball through the air. What will happen to the ball as it is traveling in the air? 

• It’s speed will decrease due to air friction.
  
• It’s speed will decrease due to its mass.
  
• It’s speed will increase due to the quarterback’s arm. 
• It will travel at a constant speed the entire time. 

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Frank drew the following chart using data from an experiment he conducted on a toy car. At what point does the car have an unbalanced force acting on it? 

• 5s 
• 15 s 
• 25 s 
• 35 s 

Tags

NGSS.MS-PS2-2

Which of the following scenarios is an example of an unbalanced force? 

• a car traveling constantly at 50 mph 
• a golf ball being hit with a club
  
• a big truck stopped at a red light
  
• a satellite orbiting the earth 

Tags

NGSS.MS-PS2-2

Sara is investigating how the slope of an incline will affect the amount of unbalanced force acting on a marble. She sets up her experiment similar to the illustration below.

How will Sara change the variable in the experiment? 

• use a marble of different mass
  
• change the surface material of the incline 
• change the slope of the incline
  
• adjust the temperature in the room 

Tags

NGSS.MS-PS2-2

A rocket has a downward force of 1 N due to gravity and an upward force of 1 N. The rocket is: 

• launching and accelerating upward 
• reaching the peak of its traveled height 
• increasing its speed as it is falling 
• accelerating either upward or downward 

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Capt. Sanchez announces to the passengers on his airplane they are traveling at 300 mph 950 eastbound. He is describing the ___________________ of the airplane. 

• velocity 
• speed 
• direction 
• acceleration 

Annabelle walks to school every day from her house. The diagram below shows the distance from her house to school measured in 1 km increments. If it takes her 30 minutes to walk to school, what was her average speed? 

• 4 km/hr 
• 7.5 km/hr 
• 8 km/hr 
• 0.13 km/hr 

Tags

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