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Direction: Choose the answer and indicate it by darkening the appropriate circle on your answer sheet.
Which material is the best conductor of electricity?
Which of the following materials is the best insulator?
Heat will transfer from:
Which of these is an opaque object?
Which material is transparent?
A material is said to be transparent if
Most of the light shining on a ____________ will be reflected.
The diagram below shows an incomplete electrical circuit that includes a battery, a bulb, and three wires labeled A, B, and C.
The bulb is not lit. What should be done in order to light the bulb and complete the circuit?
The diagram below shows a bulb and a wire attached to a battery.
Why would this bulb be lit?
When you hook up a battery to a complete circuit, what flows through the wires from one pole of the battery to the other?
Glass, water, and clear plastic allow light to pass through them. Which word BEST describes these objects?
Which BEST describes what happens when light reaches translucent materials?
Dickson wants to install windows in her office that will protect her privacy. What is the best material to have the windows made from?
Which material acts as a conductor of electricity?
Ken wanted to make a light bulb glow. Which set of materials would he need?
An insulator is a material that does not conduct energy well. Which of these materials is the best insulator?
Which of the following statements about a closed electric circuit is correct?
Most plants appear green because
Light rays given out by luminous objects ________________.
Kishawn performs the experiment illustrated in the figure to find out how energy flows through different materials. He warms some water to 95 °C and pours it into a bowl. Then he places spoons made of four different materials into the bowl with their handles sticking out of the water. After 2 min, he touches each spoon handle with his fingers and records his observations.
Which conclusion can Kishawn draw based on his observations?
The frequency of electromagnetic radiation is the number of waves that reaches a point in a specific amount of time. If blue light has longer wavelength that violet light, and red light has longer wavelenght thatn blue light, which among the three has the highest frequency?
Why do some solar devices have blackened surfaces?
Selena wears a dress that looks green in white light. Which of the following is true?
It will be impossible for two astronauts to communicate in space by shouting at each other. What is the reason for this?
When a steel bar is heated, ________
When light strikes an object, it may be absorbed, reflected or transmitted. In white objects,