Heat and Heat Technology

If you are given a temperature in degrees Fahrenheit and asked to convert it degrees Celsius, which equation would you use?

C=5/9 x (F - 32)

If two objects come in contact with each other, and one object is warmer than the other object, what happens?

Energy is transferred from warmer object to the colder object.

All of the particles of a substance at a certain temperature move at the same speed and in the same direction. T or F

F

All substances will expand equally with the same change in temperature. T or F

F

The temperature of a substance depends on how much of the substance you have. T or F

F

What temperature scale do weather reporter in the USA use to tell you how hot it is outside?

Fahrenheit

How is the greenhouse effect harmful?

It is going to trap too much energy.

How is the greenhouse effect helpful?

It keeps the earth more compatible.

What happens when a substance undergoes thermal expansion?

It's particles spread out and it's volume increases.

Why is it incorrect to say the temperature of an object is 23 degrees K?

K is not in degrees.

What is the relationship between a calorie and a Calorie?

One capital Calorie equals 1000 calories.

When room temperature falls below the desired temperature, the strip in the thermostat BLANK and and electric circuit is BLANK.

coils, closed

The temperature of an object BLANK as its particles slow down.

decreases

Heat is a transfer of what?

energy.

The faster the particles of an object are moving, the BLANK the temperature of the object.

higher

What is temperature?

kinetic energy

To calculate the specific heat capacity of a substance you need to know the amount of energy transferred by the substance to the water, then test the substance's BLANK and the change in its BLANK.

mass and temperature

You can feel the warmth of a portable heater like the one in Figure 10 on page 255, when you are standing near it because of BLANK.

radiation

In a convection current, warmer particles BLANK because they are BLANK than cooler particles.

rise, less dense

The bimetallic strip in a thermostat coils or uncoils with changes in what?

temperature.

In conduction, when faster moving particles collide with slower moving particles, the faster moving particles BLANK kinetic energy to the slower moving particles.

transfer

According to the Brain Food on page 248, the hottest temperature ever recorded was taken in the Libyan desert. It was 58 degrees Celsius in the shade. What is this temperature in Fahrenheit scale?

136 degrees Fahrenheit

At what temperature does water boil (in C, F and K)?

212 F, 100 C, 373 K

You can find the specific heat capacity of a substance by using what?

A calorimeter..

What do expansion joints in bridges prevent the bridge from doing?

buckling.

What type of strip is in your thermostat at home?

bimetallic.

If two objects have the same temperature, but the larger object has more moving particles that the smaller object, what do you know about the thermal energy of the two objects?

The larger object has more thermal energy.

Under what condition can heat occur between two objects?

The objects must be at different temperatures.

You place a warm bottle of juice in ice water. After the bottle and ice water have reached thermal equilibrium, what happens?

The water and the juice have the same temperature.

In the tables of conductors and insulators on page 254, what do all of the objects named as conductors have in common?

They are all made of metal.