Two liquids are added together in a beaker. A precipitant is formed. What kind of change is this?
A chemical change
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15
What is the energy of motion?
Kinetic energy
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lifesaver
Give 10 points!
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shark
Other team loses 20 points!
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fairy
Take points!
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25
lifesaver
Give 15 points!
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15
When do you add forces together?
When the forces are in the same direction
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15
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed.
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15
What is the formula for speed?
Speed= Distance/Time
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15
The chemical equation for sodium sulfate is Na2SO4. How many sulfur atoms are in the formula for sodium sulfate?
1
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15
A car speeding up or slowing down is an example of what?
Acceleration
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When do you subtract forces?
When the forces are in opposite directions
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During a game of tug-a-war, neither team is able to make any advance. What can be assumed about the forces?
The forces are balanced
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15
When would a skateboarder have the most potential energy? (at the top, bottom, or middle of the hill)
The top of the hill
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What is the difference between the velocity and the speed of an object?
Velocity has a direction associated with it, while speed has no specific direction.
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15
Potential or Kinetic: A quartback throwing a football.
Kinetic
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baam
Lose 20 points!
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fairy
Take points!
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25
fairy
Take points!
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thief
Give points!
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25
15
2 students are working to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table. If the force of friction resisting the student’s push is 4 N, what is the net force acting on the board?
