DAVIS SCIENCE PART 2 Question Preview (ID: 34607)


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Handles on metal pans are often coated with plastic. What is the most likely reason for this?
a) Plastic is a good conductor of heat.
b) Metal is a poor conductor of heat.
c) Plastic is a poor conductor of heat.
d) Metal and plastic are good conductors of heat.

Sue is building a bike with a metal frame in a warm, sunny area. Which material would be best for Sue to use for the grips on the handlebars so that her hands do not get too hot?
a) silver metal, because silver reflects heat, and metal conducts heat
b) black metal, because black absorbs heat from the sun, and metal does not conduct heat
c) white rubber, because white reflects heat, and the rubber does not heat up quickly
d) black rubber, because black reflects heat from the sun, and rubber does not conduct heat

Billy’s mom is having a hard time opening a jar of jelly. Billy tells his mom to hold the jar lid under water for a short period of time. Which best explains the water temperature Billy’s mom should use and why this would help?
a) Hot water warms the lid and causes it to contract, making it easier to open.
b) Hot water warms the lid and causes it to expand, making it easier to open.
c) Cold water cools the lid and causes it to contract, making it easier to open.
d) Cold water cools the lid and causes it to expand, making it easier to open.

Which best describes what will happen to water when it is heated above its boiling point?
a) It will double in mass.
b) It will turn into a solid.
c) It will turn into steam.
d)

Water is being boiled on the stove. What is the change that is taking place?
a) A solid is changing into a gas.
b) A liquid is changing into a gas.
c) A solid is changing into a liquid.
d)

. A dark colored wall becomes warm when the Sun is shining on it. After the Sun sets, a person standing a meter away can feel warmth from the wall. How does heat transfer from the wall to the person?
a) radiation
b) conduction
c) convection
d) insulation

Jake is wearing gloves while he gets a hot pan out of the oven. Which best explains why Jake needs to wear gloves while he is carrying the hot pan?
a) The gloves protect his hands from convection heat in the hot pan.
b) The gloves protect his hands from heat that is radiated through the hot pan.
c) The gloves protect his hands from heat that is conducted through the hot pan.
d) The gloves protect his hands from heat that enters the pan from the surrounding air.

Michelle wants to roast marshmallows over a fire. Which best explains how this process happens?
a) The warmth of the fire is conducted into the marshmallow
b) The warmth of the fire is radiated into the marshmallow.
c) The coolness of the marshmallow is conducted into the fire.
d) The coolness of the marshmallow is radiated into the fire.

Which best explains why a freezer would be made out of thick plastic?
a) to keep the cool air from escaping
b) to conduct cool air into the freezer
c) to heat the contents of the freezer
d)

What causes condensation?
a) cool air cooling off and making clouds.
b) evaporation cooling and changing back to a liquid
c) convection changing to rain
d) liquid to gas

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