Answer the following question given this paragraph: Even if Laura didn't try to stop the skateboard, it would stop sooner or later. That's because there's also friction between the wheels and the pavement. Friction is a force that counters all kinds of motion. It occurs whenever two surfaces come into contact. Q: What force occurs whenever two surfaces come into contact? A:
OPTIONS:
- tension
- vibration
- gravity
- friction
friction
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Answer the following question given this paragraph: Q: Vertebrates also require relatively large quantities of calcium and phosphorus for building and maintaining what? A:
OPTIONS:
- brain cells
- blood
- metabolism
- bone
bone
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Answer the following question given this paragraph: Common diseases of the respiratory system include asthma, pneumonia, and emphysema. All of them are diseases of the lungs. The main way to keep your respiratory system healthy is to avoid smoking or breathing in the smoke of others. Q: Common disease of what system include asthma, pneumonia, and emphysema? A:
OPTIONS:
- the fecal system
- the digestive system
- the glandular system
- the respiratory system
the respiratory system
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Answer the following question given this paragraph: The distribution of darts on a dartboard shows the difference between accuracy and precision. Q: What does the distribution of darts on a dartboard shows the difference between? A:
OPTIONS:
- production and precision
- Aim and precision
- equilibrium and precision
- accuracy and precision
accuracy and precision
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