Weather Expressions Part 2 — Unit test Answers

Which occurs when a warm fluid cools down?

Which of these prevents conduction from occurring?

Under which condition is no work done?

Which is an example of radiation?

Allison drew a diagram to illustrate radiation.

Dimas reads that it takes 270 N to lift a firefighter’s equipment. If a firefighter does 5400 J of work carrying the equipment up a staircase, how high does the firefighter climb? (Work: W = Fd)

Which type of energy is transferred by convection currents?

Which is the correct order of materials in terms of reflectivity, from least to greatest?

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

How much time is needed for a 15,000 W engine to do 1,800,000 J of work? (Power: P = W/t)

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 material would result in the least amount of energy transfer?

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?

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?

At which temperature does water have particles with a greater average kinetic energy than water with a temperature of 30°C?