Unit 2 - Chemistry Review Question Preview (ID: 45432)


7th Grade Chemistry Review.[print questions]

What is the definition of RADIATION?
a) When heat is transferred through waves of heat across a distance.
b) When heat transfers from objects that are touching.
c) When heat is transferred through circulation of liquid or gases
d) None

Which of the following is an example of convection?
a) A hair dryer is drying up your hair.
b) When a car engine turns hot after being turned on.
c) When the AC or heater changes the temperature.
d) When you are making soup and the water is rising and lowering.

What is the definition of CONVENTION?
a) When heat is transferred through waves of heat across a distance.
b) When heat transfers from objects that are touching.
c) When heat is transferred through circulation of liquid or gases
d) None

What is the definition of CONDUCTION?
a) When heat is transferred through waves of heat across a distance.
b) When heat transfers from objects that are touching.
c) When heat is transferred through circulation of liquid or gases
d) None

When you burn a candle, all that visibly remains is a small puddle of wax. The puddle of wax has less mass than the original candle. The rest of the original candle’s mass was...
a) destroyed.
b) changed to gases.
c) measured incorrectly.
d) immeasurable.

Which of the following best describes what happens to the arrangement of the atoms after a reaction?
a) The arrangement of the atoms in the reactants is the same as the arrangement of the atoms in the products.
b) The arrangement of the atoms has regrouped and the new substances have the same properties as those of the reactants.
c) The arrangement of the atoms in the reactants is different than the arrangement of the atoms in the products.
d) The arrangement of the atoms have regrouped and the mass of the products is different than the mass of the reactants.

Which experiment did a chemical reaction take place?
a) Experiement A produced bubbles which indciates a new substance was formed.
b) Experiment B showed an increased in volume which indicates a new substance was formed.
c) Experiment C crystals dissolved completely which indicates a new substance was formed.
d) Experiment D resulted with the solid sinking which indicates a new substance was formed.

When one substance reacts to form another substance, the...
a) mass of the substance increases.
b) properties of the substances change.
c) mass of the substances decreases.
d) number of atoms increases.

The container that would be best suited for this would also have which of the following characteristics?
a) Slows down the cooling of hot chocolate
b) Holds a large volume of liquid
c) Allows light to easily pass through
d) Does not react with metallic substances

Which statement best explains what happened when a chemical reaction occured?
a) During the reaction, new elements were made from the atoms.
b) During the reaction, the atoms were rearranged to form new substances.
c) During the reaction, elements were destroyed in order to produce the products.
d) During the reaction, the atoms were replaced with new atoms.

Which of the following is needed for convection to happen?
a) Fluid/gas
b) Electromagnetic waves
c) Light in the form or rays
d) Fire

When a pot is touching a stove that is on, what heat transfer is happening?
a) Conduction
b) Radiation
c) Convection
d) Insulation

This is a lava lamp. When the light bulb heats the wax, the wax rises. When the wax cools, it falls. This cycle of rising/falling is an example of:
a) Conduction
b) Convection
c) Radiation
d) Insulation

The baby chickens are kept warm from the heat lamps demonstrates this type of heat transfer.
a) Conduction
b) Convection
c) Radiation
d) Insulation

Heat transfers from an area of ____temperature to an area of ___ temperature
a) high, low
b) high, high
c) low, high
d) low, low

Walking on the warm sand sand with your bare feet demonstrates this type of heat transfer.
a) Conduction
b) Convection
c) Radiation
d) Insulation

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