Radiation — Unit test Answers

Which shows the formula for converting from kelvins to degrees Celsius?

At the coast on a summer day, the land is hotter than the ocean. Warm air over the land rises and is replaced by cooler air, causing a sea breeze. At night, the land cools quickly and the ocean is now warmer than the land. What will happen next?

The total energy in a system is 675 J. The kinetic energy changes from 296 J to 432 J. Which statement best describes the potential energy of this system?

Which indicates that thermal energy is no longer being transferred from boiling water to a mug?

Two examples of energy transformations are shown.

Cindy pours cool milk into a hot bowl of oatmeal and then stirs it with a room-temperature spoon. Which substance will have heat flow from it to the other substances?

Which is equal to a temperature of 20°C?

Which statement best describes heat and thermal energy?

Which condition must be met for conduction to occur?

Allison drew a diagram to illustrate radiation.

Four students are carrying out different laboratory procedures.Piroja is mixing baking soda and vinegar to see if it reacts.Jason is heating salt water over a burner until the water evaporates.Kali is putting crushed ice and ice cubes on a table to see which melts first.Francisco is separating iron filings from sand using a magnet.

Which shows the temperatures of three substances, in order, from greatest to least?

Doug is doing work. Without knowing exactly what he is doing, which can be said about the work he is doing?

A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside? (Formula: PE = mgh)

What is the overall energy transformation in a coal-fired power plant?