12-1-20 @ science review

When sugar dissolves in water, which physical property of

sugar changes? @

• The size of the sugar crystals

• The size of the sugar crystals

• The color of the sugar

• The mass of the sugar

Use the picture to answer the next question.

Which statement is true about the device shown?@

• The cell phone is using electrical energy to produce only light energy.

• The cell phone is using electrical energy to produce light, sound, and

  thermal energy.

• The cell phone is using light energy to produce electrical and sound

  energy.

• The cell phone is using light energy to produce mechanical, electrical,

  and thermal energy.

Use the picture to answer the next question.

When the sunlight strikes the surface of the lake, the light rays —@

• are reflected causing the light to bend, and refracted causing the light

  to bounce back

• are completely absorbed in the water and nothing is visible

• are reflected, or bounce off, causing the light to travel through the

  water and move in a wavy line

• are reflected causing the light to bounce off, and are refracted causing

  the light to bend when traveling through water

Which of the following physical properties will NOT change when a tea

bag is placed in a sugar water solution?@

• The color of the solution

• The taste of the solution

• The smell of the solution

• The state of matter of the solution

@A student is building a circuit board that will show how electrical energy

flows to produce light energy. Which materials does the student need to

build the circuit that will demonstrate the flow of energy?@

• A. Battery, bulb, switch, copper wire

• B. Switch, battery holder, battery, bulb

• C. Copper wire, battery, switch, magnet

• D. Switch, bulb, copper wire, battery holder

Which two objects use electrical and mechanical energy to move an

object?@

• A fan and a hair dryer

• A radio and a stove

• A lamp and a television

• A camera and an MP3 player

@Use the picture to answer the next question. Which of these changes to the electric circuit shown above will cause the

lightbulb to light up?

• A. Turning one battery so that its positive end connects to the other

  battery’s negative end

• B. Adding a switch and more wire so that the current can flow more

  easily

• C. Straightening the wire so that the current can flow more easily

• D. Making the length of wire the same on both sides of the light bulb

@The arrows in the diagrams below represent light. Which diagram best

shows how a glass mirror would reflect light?

• 
• 
• 
• 

@Under which condition would water reflect light so that it creates a

mirror-like image?@

• A. Water at the base of a waterfall

• B. Water in a moving stream

• C. Water flowing from a garden hose

• D. Water in a still pond

Which of the following physical properties will NOT change when a tea

bag is placed in a sugar water solution?

• A. The color of the solution

• B. The taste of the solution

• C. The smell of the solution

• D. The state of matter of the solution