The minimum number of fixed reference points required to establish the Celsius temperature scale tor a thermometer is: (1) 1, (2) 2, (3) 3, (4) 4.

The difference between the boiling point and the freezing point of pure water at standard pressure is (1) 32 K (2) 273 K (3) 100 K (4) 373 K

Which term represents a form of energy? (1) heat (2) degree (3) kilojoule (4) temperature

The pressure exerted on 200. mL of a gas is decreased from 900. torr to 800. torn What is the new volume of the gas if the temperature remains constant?

Why are there no craters on Io and few on Europa? Why should you expect Io to suffer more impacts per square kilometer than Callisto?

Julieta's friends all have different personal traits. Complete the senteces below using the verb in parenthesis.

1. Maria ____________________ inteligente. (ser)

2. Julio y Marcos _______________ en Ecuador. (estar)

3. Norma y yo ____________________ cansadas. (estar)

4. Tu _____________________ un estudiante de español. (ser)

5. Hoy ________________________ el tres de agosto. (ser)

What are the maquiladoras?

Which of the following is NOT a form of energy? a. light b. oxygen c. heat d. electricity

Which of the following is not a form of energy? (a) light (b) sound (c) air (d) electricity

Which property is a measure of the average kinetic energy of the particles in a sample of matter?

(1) mass

(2) temperature

(3) pressure

(4) density

Which occurs as a substance melts? (1) It changes from a solid to a liquid and heat is absorbed. (2) It changes from a solid to a liquid and heat is released. (3) It changes from a liquid to a solid and heat is absorbed. (4) It changes from a liquid to a solid and heat is released.

Indicate whether J.J. Thomson would have agreed or disagreed with each of the following statement. "Atoms of all elements contain electrons." Give reasons for your answer.

If solving a system leads to a false statement such as 0=5, the solution set ____.

The heat of fusion is defined as the energy required (at constant temperature) to change a (1) gas to a liquid, (2) gas to a solid, (3) solid to a gas, (4) solid to a liquid.