Atoms
electrons
Water is an...
a. element
b. compound
c. neutron
d. electron cloud
b. compound
If a spoon in a cup of soup become warmer, which type of heat transfer is it?
a. Convection
b. Radiation
c. Conduction
c. Conduction
The temperature at which a substance changes from a liquid to a solid.
a. Boiling point
b. Melting point
c. Freezing point
c. freezing point
The faster the molecules are moving,
a. The higher the temperature
b. The lower the temperature will be
c. Particle movement does not relate to temperature
a. the higher the temperature
An element is made up of
a. Many types of atoms
b. Many types of molecules
c. At least two types of atoms
d. One type of atom
d. one type of atom
Carbon dioxide consists of which two elements?
Water boiling is due to________.
a. Convection
b. Radiation
c. Conduction
a. Convection
As water in the freezer turns into ice,
a. The water neither absorbs or release energy
b. The water absorbs energy from the cold air in the freezer
c. The particles in the water speed up
d. The freezer air absorbs heat from the water.
d. The freezer air absorbs heat from the water.
A good scientific practice after you make your initial design is
to___________________.
a. Be done with the whole thing as quickly as possible
b. Form a conclusion
c. Test the prototype and then make modifications
d. Design something else
c. test the prototype and then make modifications
An atom has 23 protons and 23 neutrons. What is the atomic mass?
46 AMU
How many hydrogen atoms would there be in three molecules of Sulfuric acid?
H2SO4
6
When air cools down the molecules ________
a. Speed up
b. Slow down
c. Stay the same
b. Slow down
In which state of matter are the particles mostly touching but arranged in a random way?
If you want to maximize the heat energy in order to melt a crayon, you should
a. Place it in a Styrofoam cup
b. Place it on a piece of foil in the sunlight
c. Place it in a glass dish in the shade
d. Place it in your hands, but keep your hands closed.
b. place it on a piece of foil in the sunlight
AMU stands for
a. Atomic Mass Units
b. Atomic Moving Usable Energy
c. Always Mind Unstable
d. Astronomic Metric Units
A. Atomic Mass Units
How many atoms are there in one molecule of Sugar?
C₁₂H₂₂O₁1
45 atoms
What is the measurement of average kinetic energy of the particles in a substance?
a. Celsius
b. Kelvin
c. Weight
d. Temperature
d. temperature
An ice cube is heated past its melting point. Later, it is cooled past its freezing point. What state of matter is the ice now?
Solid
What is thermal equilibrium?
a. When two objects are at rest at the same time
b. Potential energy
c. When objects reach boiling point
d. When two objects reach a common temperature.
d. when two objects reach a common temperature
The Bohr model shows that
a. Electrons are on the inside.
b. The protons orbit around the nucleus
c. The electrons are orbiting in varying degrees of energy
d. The electrons are still.
c. The electrons are orbiting in varying degrees of energy
Which elements are in table salt?
NaCl
Sodium and Chlorine
Convection currents can happen in
a. Solids only
b. Liquids only
c. Gas only
d. Liquids and gas
d. liquids and gas
When s substance changes from solid to gas and does
not go through the liquid phase it is called what?
a. Evaporation
b. Condensation
c. Freezing
d. Sublimation
d. sublimation
Which theory describes the arrangement and movement of particles in
solids, liquids and gases?
a. Theory or relativity
b. Kinetic theory
c. Atomic theory
b. kinetic theory