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What is the ratio of elements in glucose (C6H12O6)?
a. 1:1:1
b. 1:2:1
c. 2:3:2
d. 2:6:2
b. 1:2:1
Which pollutant is openly released into the atmosphere when coal is burned to supply energy to power plants?
a. lead
b. mercury
c. carbon dioxide
c. carbon dioxide
How can mixtures best be described?
A. made of one element
B. made of different elements that are all chemically bonded together
C. made of different elements that are not all chemically bonded together
C. made of different elements that are not all chemically bonded together
Which resource when used causes the MOST pollution?
A. solar
B. coal
C. wind
D. water
B. coal
Which characteristic of an element determines its placement in the periodic table?
A. mass
B. size
C. number of neutrons
D. number of protons
D. number of protons
Which is true about the compounds carbon monoxide (CO) and carbon dioxide (CO2)?
a. The compounds have the same properties because they are both gases.
b. The compounds have the same properties because they contain the same elements.
c. The compounds have different properties because they are found in different amounts in the atmosphere.
d. The compounds have different properties because they contain the same elements in different quantities.
d. The compounds have different properties because they contain the same elements in different quantities.
If an ash pond from a coal-fired power plant leaks ash into a local creek, which is an environmental consequence?
a. Plants and organisms in the creek will be unaffected.
b. Plants and organisms in the creek may die out.
c. Plants and organisms in the creek may increase.
b. Plants and organisms in the creek may die out.
If a highly-reactive metal with one valence electron is discovered, in which group would the element best fit?
A. group 1
B. group 2
C. group 6
A. group 1
Which best describes a process that depletes an organic renewable resource?
A. a car producing emissions
B. coal burning in a power plant
C. a developer cutting down trees
C. a developer cutting down trees
Which property of matter can easily be determined by looking at the periodic table?
A. density
B. solubility
C. melting point
D. chemical reactivity
D. chemical reactivity
How are the properties of elements related to the properties of the compounds they make?
a. The properties of the compound are always the same as the properties of the elements.
b. The properties of the compound are completely different than the properties of the elements.
c. The element in the compound with the largest number of atoms gives the compound its properties.
d. The element in the compound with the smallest number of atoms gives the compound its properties.
b. The properties of the compound are completely different than the properties of the elements.
Solar batteries collect and store solar energy for conversion to electrical energy. Which represents a major consequence of the use of solar batteries?
a. cost of the batteries
b. disposal of the batteries
c. lifespan of the batteries
b. disposal of the batteries
A researcher uses several procedures to separate a rock sample into different chemicals. A mass of 50 grams of one chemical is produced. If this chemical cannot be separated into other chemicals, then it is BEST described as
A. a compound.
B. a mixture.
C. a solution.
D. an element.
D. an element.
Which practice should be used with nonrenewable energy resources until affordable alternate energy options are developed?
A. depletion
B. stockpiling
C. preservation
D. conservation
D. conservation
Which elements are the least reactive on the periodic table?
A. halogens
B. noble gases
C. alkali metals
B. noble gases
The formula for glucose is C6H12O6. How many atoms are present in the glucose compound?
A. 1
B. 6
C. 12
D. 24
D. 24
Which form of energy transformation would result in the emission of the greenhouse gas methane?
a. nuclear energy
b. solar energy
c. coal mining
c. coal mining
Which best describes a heterogeneous mixture?
A. It contains only one type of atom.
B. It is composed of two or more elements in a fixed pattern.
C. It contains two or more types of particles which are easily distinguished.
D. It is composed of two or more substances in which particles are evenly blended.
C. It contains two or more types of particles which are easily distinguished.
Which is an environmental consequence of using biomass as a source of energy?
A. There are no environmental consequences for using biomass as a source of energy.
B. Biomass creates harmful emission of carbon and sulfur, and causes massive cutting of trees.
C. Biomass has a great impact on the temperature of fresh water and the amount of dissolved oxygen.
B. Biomass creates harmful emission of carbon and sulfur, and causes massive cutting of trees.
Which property is unique for each element?
A. mass number
B. atomic number
C. state of matter
B. atomic number
How many more atoms does hydrogen peroxide (H2O2) have than water (H2O)?
a. one
b. two
c. three
d. four
a. one
In 1979, the U.S. Three Mile Island nuclear power plant experienced a meltdown. The temperature of the core rose so high the materials actually melted. In 1986, the Russian Chernobyl nuclear power plant had a reactor explosion. What was the immediate danger to the public in both incidents?
a. radiation exposure
b. intensive heat
c. fire damage
a. radiation exposure
Which is true about the compounds carbon monoxide (CO) and carbon dioxide (CO2)?
A. The compounds have the same properties because they are both gases.
B. The compounds have the same properties because they contain the same elements.
C. The compounds have different properties because they are found in different amounts in the atmosphere.
D. The compounds have different properties because they contain the same elements in different quantities.
D. The compounds have different properties because they contain the same elements in different quantities.
Which is the most likely economic consequence of oil supplies becoming scarce?
A. The cost of energy produced from oil will increase.
B. Scientists will develop ways to make oil in the laboratory.
C. Oil companies will need to expand to search for oil in new places.
A. The cost of energy produced from oil will increase.
Where would the most reactive metallic elements of the periodic table most likely be found?
A. in the B families
B. on the top of the table
C. on the far left side of the table
C. on the far left side of the table