NC Common Exam, Science 2013
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27 questions
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- Q1How are earthquakes, sound, and light waves alike?They carry matterThey can be seenThey transmit energyThey travel in space30s
- Q2What is the relationship between eyesight and light?Light shines through all objects, allowing people to see them.Light reflects off an object and then enters the eye, allowing people to see the object.Light shines on all objects, allowing people to see them.Light enters the eye before striking an object, allowing people to see the object.30s
- Q3Which best explains the relationship between the electromagnetic spectrum and sight?Visible light and infrared light and the parts of the electromagnetic spectrum that can be seen with the eye.Ultraviolet light and infrared light are the parts of the electromagnetic spectrum that can be seen with the eye.Visible light is the part of the electromagnetic spectrum that can be seen with the eye>Ultraviolet light is the part of the electromagnetic spectrum that can be seen with the eye.30s
- Q4Which best explains the relationship between the speed of sound and the medium through which it passes?Sound travels slower in air because of the increased distance between air particles.Sound travels slower in solids because of the decreased distance between solid particles.Sound travels faster in air because of the decreased distance between air particles.Sound travels faster in solids because of the increased distance between solid particles.30s
- Q5Josephine adds thicker strings to her guitar. What does that do?It changes the vibrations made by the guitar.It changes the number of strings on the guitar.It prevents the guitar from making sounds.It prevents the guitar from using air particles to transfer the sound.30s
- Q6Which is composed of matter?electricityAn atomlightheat30s
- Q7Two of the same kind of magnets are being used. What is true about these two magnets?They contain different types of atoms but the same elements.They contain the same types of atoms and elements.They contain different types of atoms and elements.They contain the same types of atoms but different elements.30s
- Q8How are the atoms in an object affected when the temperature of the object increases?They join together.They split apart.They vibrate faster.They vibrate slower.30s
- Q9In which situation would the atoms in an object begin to move closer together during a phase change?Heat is removed as a gas turns into a liquid.Heat is removed as a liquid turns into a gas.Heat is added as a liquid turns into a solid.Heat is added as a solid turns into a gas.30s
- Q10Sarah has 100 grams of 4 different elements and the melting point of each element. What would happen if she melted only 50 grams of each element?The melting point for each element would decrease by half because the mass was changed.The melting process would occur more quickly, but the melting points would be decreased by half.The melting point for each element would double because the mass was changed.The melting process would occur more quickly, but the melting points would remain the same.30s
- Q11How does 250 mL of water compare to 500 mL of water?They have the same volume but different densities.They have the same boiling point but different melting points.They have the same density but different volumes.They have the same melting points but different boiling points.30s
- Q12During the day, the sand at the beach is very warm; while at night, it is cooler. Why does the occur?The sand absorbs the sun's energy during the day, causing it to become warmer.The sand scatters the sun's energy during the day, causing it to become warmer.The sand reflects the sun's energy during the day, causing it to become warmer.The sand refracts the sun's energy during the day, causing it to become warmer.30s
- Q13A worker for an electrical company is preparing to fix a power line. Why would he put on rubber gloves before working with any power lines?Rubber is a poor conductor of heat but a good conductor of electricity.Rubber is a poor conductor of heat and electricity.Rubber is a good conductor of heat but a poor conductor of electricity.Rubber is a good conductor of heat and electricity.30s
- Q14Why are some coffee cups composed of ceramic material?Ceramic materials are conductors that limit heat transfer.Ceramic materials are insulators that aid heat transfer.Ceramic materials are conductors that aid heat transfer.Ceramic materials are insulators that limit heat transfer.30s
- Q15Why does Earth have different seasons?because of the tilt of Earth on its axis as it moves around the sunbecause of the distance between Earth and the sunbecause of the speed of Earth as it rotates on its axisbecause of the amount of light blocked by the moon on its axis30s