The correct answer is:
Each year, the CO2 level increases at a faster rate. Over the past 50 years, it has nearly doubled.
What does al Gore,author of an inconvenient true, demonstrate about the level of atmospheric carbon dioxide levels?
Each year, the CO2 level rises and then falls. Over the past 50 years, it has steadily increased.
Each year, the CO 2 level increases at a faster rate. Over the past 50 years, it has nearly doubled.
Each year, the CO2 level decreases. Over the past 50 years, it has steadily decreased.
15 answers
According to An Inconvenient Truth, what is the role of infrared radiation in global warming?
A. All of the sun’s energy is converted to infrared radiation and then remains in the atmosphere. This warms the atmosphere.
B. Over time, infrared radiation makes the atmosphere thinner. This warms the atmosphere.
C. Greenhouse gases trap some infrared radiation in the atmosphere. This warms the atmosphere.
A. All of the sun’s energy is converted to infrared radiation and then remains in the atmosphere. This warms the atmosphere.
B. Over time, infrared radiation makes the atmosphere thinner. This warms the atmosphere.
C. Greenhouse gases trap some infrared radiation in the atmosphere. This warms the atmosphere.
C. Greenhouse gases trap some infrared radiation in the atmosphere. This warms the atmosphere.
In which sentence below is the underlined word an indirect object?
A. Gore published *An Inconvenient Truth* a few years after he ran for president.
B. My sister gave *me* a signed copy of the book
c. She said she preferred the documentary *film*
A. Gore published *An Inconvenient Truth* a few years after he ran for president.
B. My sister gave *me* a signed copy of the book
c. She said she preferred the documentary *film*
B. My sister gave *me* a signed copy of the book.
When iron rusts and forms iron oxide, the iron oxide has more mass than the iron. Which statement correctly explains this
observation? (1 point)
(A)Iron oxide has oxygen atoms, and pure iron does not.
(B)The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron.
(C)The iron atoms in iron oxide have more mass than pure iron.
(D)There are more iron atoms in iron oxide than in pure iron.
observation? (1 point)
(A)Iron oxide has oxygen atoms, and pure iron does not.
(B)The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron.
(C)The iron atoms in iron oxide have more mass than pure iron.
(D)There are more iron atoms in iron oxide than in pure iron.
(B) The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron.
substance. Given that matter is neither created nor destroyed, which chemical formula is the product of this reaction? (1 point)
Ca2CO3
CaCO2
Ca203
0 CaCO3
Ca2CO3
CaCO2
Ca203
0 CaCO3
The correct answer is: CaO
One molecule of calcium oxide, CaO, and one molecule of carbon dioxide, CO2, combine in a chemical reaction to form one substance. Given that matter is neither created nor destroyed, which chemical formula is the product of this reaction?(1 point) Responses Ca2CO3 Ca 2 CO 3 CaCO3 CaCO 3 Ca2O3 Ca 2 O 3 CaCO2
The correct answer is: CaCO3
Which statement correctly explains why the ashes of burnt paper have less mass than the original paper?
A.) The ash is created from new atoms that have less mass than the paper.
B.) Some of the atoms in the paper are destroyed when it burns.
C.) Some of the atoms in the paper became gases.
D.) Other atoms combine with the paper to produce the ash.
A.) The ash is created from new atoms that have less mass than the paper.
B.) Some of the atoms in the paper are destroyed when it burns.
C.) Some of the atoms in the paper became gases.
D.) Other atoms combine with the paper to produce the ash.
C.) Some of the atoms in the paper became gases.
2H2 + 1O2 →→ 2H2O
if you change the 2H2 to 3H2 molecules and balance the equation, which statement is correct?
Each oxygen molecule will combine with 2 hydrogen molecules with no leftover molecules.
The equation will produce three molecules of water.
The result of the equation will be the same.
It is not possible to produce water without leftover molecules.
if you change the 2H2 to 3H2 molecules and balance the equation, which statement is correct?
Each oxygen molecule will combine with 2 hydrogen molecules with no leftover molecules.
The equation will produce three molecules of water.
The result of the equation will be the same.
It is not possible to produce water without leftover molecules.
If you change the 2H2 to 3H2 molecules and balance the equation, the correct statement is:
The result of the equation will be the same.
The balanced equation would be:
3H2 + 1O2 → 2H2O
In this case, each oxygen molecule will still combine with 2 hydrogen molecules with no leftover molecules, and the equation will still produce two molecules of water. The overall result of the equation will remain unchanged.
The result of the equation will be the same.
The balanced equation would be:
3H2 + 1O2 → 2H2O
In this case, each oxygen molecule will still combine with 2 hydrogen molecules with no leftover molecules, and the equation will still produce two molecules of water. The overall result of the equation will remain unchanged.
1 answer