internet questions on chapter 1 Flashcards
Scientists perform _____ in order to _____ a given _____.
A) experiments; test; hypothesis.
B) tests; experiment; law.
C) tests; experiment; variable.
D) facts; test; variable.
E) hypotheses; try; experiment.
A) experiments; test, hypothesis
Define and distinguish between a hypothesis and a scientific theory.
a hypothesis is a guess about something.
when data from experimentation supports a hypothesis then it can be called a theory.
The final step in the scientific method for a scientist is:
A) devising an experiment
B) collecting data
C) making observations
D) report his or her results
E) researching the literature for similar investigations
D) report on his or her findings
What is the right sequence of events applied in the scientific method?
A) question; hypothesis; observation; data; test; conclusion
B) observation; hypothesis; question; data; test; conclusion
C) observation; hypothesis; question; test; data; conclusion
D) observation; question; hypothesis; test; data; conclusion
E) question; hypothesis; data; observation; test; conclusion
D) observation; question; hypothesis; test; data; conclusion
Which of the following statements does not agree with the kinetic theory of gases?
a) Gas particles move in predictable patterns.
b) Gas particles move independently of one another.
c) Gas particles are spaced far apart from each other.
d) Gas particles are in constant motion.
a.
What happens to the kinetic energy of the particles in a sample of gas as the temperature of the sample increases? a) It increases, then decreases b) It does not change c) It increases d) It decreases
c
The vaporization of a solid is also known as
a) Condensation
b) Deposition
c) Evaporation
d) Sublimation
d.
The temperature at which the motion of particles theoretically ceases is
a) 273 K
b) –273 K
c) 0 K
d) 0°C
c
Which of the following is NOT a characteristic of liquids?
a) Liquids have the ability to flow.
b) The particles of a liquid are not attracted to each other.
c) The particles of liquids are closer together than particles of gases.
d) Liquids conform to the shape of their container.
b
Which are the first particles to evaporate from a liquid?
a) Those with the lowest average kinetic energy.
b) Those with the highest average kinetic energy.
c) Those farthest from the surface of the liquid, regardless of kinetic energy.
d) Those closest to the surface of the liquid, regardless of kinetic energy.
b
Which of these statements best explains why a liquid’s rate of evaporation increases
when the liquid is heated?
a) The potential energy of the liquid increases, which in turn increases the rate of
evaporation.
b) The surface area of the liquid increases.
c) More surface molecules have the energy required to overcome the attractive
forces holding them in the liquid.
d) The average kinetic energy of the liquid decreases.
c
If a liquid is sealed in an airtight container and kept at a constant temperature, how
will its vapour pressure change over time?
a) It rises at first, then falls over time.
b) It rises at first, then remains constant.
c) It remains constant.
d) It rises continuously
b
When gas particles escape from the surface of a liquid below the boiling point, this is called a) Evaporation b) Boiling c) Sublimation d) Condensation
a
Which of the following characteristics is true of most solids?
a) Solids are viscous.
b) Solids are incompressible.
c) Solids generally melt easily.
d) Solids are made up of particles in rapid motion
b
Which is not a phase change?
a) Melting
b) Evaporation
c) Sublimation
d) Diffusion
d
