Science Test 2

 

Look at the items pictured below. Select the items that are denser than water and have more mass than the copper penny. 

Select TWO correct answers.

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Susan and Azaria were conducting tests on objects to see if they were conductors or insulators of thermal energy. They had a beaker of hot water, a timer, and different objects they collected from the classroom. They put one object in the hot water at a time for five seconds. Then, they took the object out and used their sense of touch to feel if it conducted or insulated the thermal energy. They recorded their observations in the table below. 

Which object belongs in the conduct thermal energy? 

• Pencil

• metal paper clip

Susan and Azaria were conducting tests on objects to see if they were conductors or insulators of thermal energy. They had a beaker of hot water, a timer, and different objects they collected from the classroom. They put one object in the hot water at a time for five seconds. Then, they took the object out and used their sense of touch to feel if it conducted or insulated the thermal energy. They recorded their observations in the table below. 

Which object belongs in the insulate thermal energy? 

• pencil

• metal paper clip

A mixture of wood, glass, and iron beads were placed in a container. The picture of the beads is below. The beads are of various sizes. 

A mixture of wood, glass, and iron beads were placed in a container. The picture of the beads is below. The beads are of various sizes. 

What would be some ways to separate the beads? Choose two correct answers. 

• Use a magnet to take out the iron beads. 

• Add heat to the container. 

• Add water to the container and then take out the wood beads. 

• Throw the beads in the air. 

• Use a strainer. 

The diagram shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut at the point shown by the arrow? 

• 0

• 1

• 2

• 3

Treyce builds a circuit allowing the light bulbs to light the buzzers to ring and the motors to turn. Which TWO switches can be open and still allow all of the parts to work? 

• Switch 1

• Switch 2

• Switch 3

• Switch 4

Identify the working circuit. 

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A group of students built a parallel circuit with multiple pathways. Which tasks will turn on light bulbs A and B, but not bulb C?  Select TWO.

• close switch 1 and close switch 3

• close switch 2 and close switch 3 

• close switch 2 

• close switch 1 

• close switch 1, close switch 2, and close switch 3 

Musical instruments cause the air to vibrate, sending waves that are detected by our senses. The energy from these vibrations of air is an example of --

• thermal energy 

• light energy 

• sound energy 

• mechanical energy 

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