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list | answer_ranges
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|---|---|---|---|---|---|---|---|---|
This is illustrated in Figure 11.17 .
|
TQA:T_0090_3
| 2 |
illustrated
| true |
illustrate
|
[
"where",
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"illustrated",
"_",
"_",
"_",
"?"
] |
[
"in Figure 11.17"
] |
[
[
3,
6
]
] |
The decay of an unstable isotope to a stable element occurs at a constant rate .
|
TQA:T_0090_4
| 10 |
occurs
| true |
occur
|
[
"what",
"does",
"something",
"occur",
"_",
"at",
"_",
"?"
] |
[
"at a constant rate"
] |
[
[
11,
15
]
] |
The decay of an unstable isotope to a stable element occurs at a constant rate .
|
TQA:T_0090_4
| 10 |
occurs
| true |
occur
|
[
"what",
"_",
"_",
"occurs",
"_",
"at",
"something",
"?"
] |
[
"The decay of an unstable isotope to a stable element"
] |
[
[
0,
10
]
] |
The decay rate is measured in a unit called the half-life .
|
TQA:T_0090_6
| 4 |
measured
| true |
measure
|
[
"how",
"is",
"something",
"measured",
"_",
"_",
"_",
"?"
] |
[
"in a unit called the half-life"
] |
[
[
5,
11
]
] |
The decay rate is measured in a unit called the half-life .
|
TQA:T_0090_6
| 4 |
measured
| true |
measure
|
[
"what",
"is",
"_",
"measured",
"_",
"_",
"_",
"?"
] |
[
"The decay rate",
"decay rate"
] |
[
[
0,
3
],
[
1,
3
]
] |
The decay rate is measured in a unit called the half-life .
|
TQA:T_0090_6
| 8 |
called
| true |
call
|
[
"what",
"is",
"_",
"called",
"something",
"_",
"_",
"?"
] |
[
"a unit"
] |
[
[
6,
8
]
] |
The decay rate is measured in a unit called the half-life .
|
TQA:T_0090_6
| 8 |
called
| true |
call
|
[
"what",
"is",
"something",
"called",
"_",
"_",
"_",
"?"
] |
[
"the half-life"
] |
[
[
9,
11
]
] |
The half-life is the time it takes for half of a given amount of an isotope to decay .
|
TQA:T_0090_7
| 6 |
takes
| true |
take
|
[
"what",
"does",
"something",
"take",
"_",
"_",
"_",
"?"
] |
[
"time",
"the time"
] |
[
[
4,
5
],
[
3,
5
]
] |
The half-life is the time it takes for half of a given amount of an isotope to decay .
|
TQA:T_0090_7
| 11 |
given
| true |
give
|
[
"what",
"is",
"_",
"given",
"_",
"_",
"_",
"?"
] |
[
"amount of an isotope",
"amount of an isotope to decay",
"amount"
] |
[
[
12,
16
],
[
12,
18
],
[
12,
13
]
] |
Imagine that you start out with 100 grams of carbon-14 .
|
TQA:T_0090_9
| 0 |
Imagine
| true |
imagine
|
[
"what",
"should",
"someone",
"imagine",
"_",
"_",
"_",
"?"
] |
[
"that you start out with 100 grams of carbon-14"
] |
[
[
1,
10
]
] |
Imagine that you start out with 100 grams of carbon-14 .
|
TQA:T_0090_9
| 3 |
start
| true |
start
|
[
"what",
"does",
"someone",
"start",
"_",
"with",
"_",
"?"
] |
[
"100 grams of carbon-14"
] |
[
[
6,
10
]
] |
Imagine that you start out with 100 grams of carbon-14 .
|
TQA:T_0090_9
| 3 |
start
| true |
start
|
[
"who",
"_",
"_",
"starts",
"_",
"with",
"something",
"?"
] |
[
"you"
] |
[
[
2,
3
]
] |
The rate of decay of unstable isotopes can be used to estimate the absolute ages of fossils and rocks .
|
TQA:T_0091_0
| 9 |
used
| true |
use
|
[
"what",
"can",
"_",
"used",
"_",
"by",
"something",
"?"
] |
[
"The rate of decay of unstable isotopes",
"rate of decay of unstable isotopes"
] |
[
[
0,
7
],
[
1,
7
]
] |
The rate of decay of unstable isotopes can be used to estimate the absolute ages of fossils and rocks .
|
TQA:T_0091_0
| 9 |
used
| true |
use
|
[
"what",
"can",
"something",
"used",
"_",
"_",
"to do",
"?"
] |
[
"estimate the absolute ages of fossils and rocks",
"to estimate the absolute ages of fossils and rocks"
] |
[
[
11,
19
],
[
10,
19
]
] |
The rate of decay of unstable isotopes can be used to estimate the absolute ages of fossils and rocks .
|
TQA:T_0091_0
| 11 |
estimate
| true |
estimate
|
[
"what",
"can",
"_",
"estimated",
"_",
"_",
"_",
"?"
] |
[
"The rate of decay of unstable isotopes",
"the absolute ages of fossils and rocks"
] |
[
[
0,
7
],
[
12,
19
]
] |
This type of dating is called radiometric dating .
|
TQA:T_0091_1
| 3 |
dating
| true |
date
|
[
"how",
"is",
"something",
"dated",
"_",
"_",
"_",
"?"
] |
[
"radiometric dating"
] |
[
[
6,
8
]
] |
This type of dating is called radiometric dating .
|
TQA:T_0091_1
| 5 |
called
| true |
call
|
[
"what",
"is",
"_",
"called",
"something",
"_",
"_",
"?"
] |
[
"This type of dating",
"dating"
] |
[
[
0,
4
],
[
3,
4
]
] |
This type of dating is called radiometric dating .
|
TQA:T_0091_1
| 5 |
called
| true |
call
|
[
"what",
"is",
"something",
"called",
"_",
"_",
"_",
"?"
] |
[
"radiometric dating"
] |
[
[
6,
8
]
] |
This type of dating is called radiometric dating .
|
TQA:T_0091_1
| 7 |
dating
| true |
date
|
[
"what",
"is",
"_",
"dated",
"_",
"_",
"_",
"?"
] |
[
"radiometric"
] |
[
[
6,
7
]
] |
The best-known method of radiometric dating is carbon-14 dating .
|
TQA:T_0092_0
| 5 |
dating
| true |
date
|
[
"what",
"is",
"_",
"dated",
"_",
"_",
"_",
"?"
] |
[
"carbon-14"
] |
[
[
7,
8
]
] |
The best-known method of radiometric dating is carbon-14 dating .
|
TQA:T_0092_0
| 8 |
dating
| true |
date
|
[
"what",
"is",
"_",
"dated",
"_",
"_",
"_",
"?"
] |
[
"carbon-14"
] |
[
[
7,
8
]
] |
A living thing takes in carbon-14 -LRB- along with stable carbon-12 -RRB- .
|
TQA:T_0092_1
| 1 |
living
| true |
live
|
[
"what",
"is",
"_",
"living",
"_",
"_",
"_",
"?"
] |
[
"thing"
] |
[
[
2,
3
]
] |
A living thing takes in carbon-14 -LRB- along with stable carbon-12 -RRB- .
|
TQA:T_0092_1
| 3 |
takes
| true |
take
|
[
"what",
"does",
"something",
"take",
"_",
"_",
"_",
"?"
] |
[
"in carbon-14 -LRB- along with stable carbon-12",
"carbon-14 -LRB- along with stable carbon-12 -RRB-",
"carbon-14"
] |
[
[
4,
11
],
[
5,
12
],
[
5,
6
]
] |
A living thing takes in carbon-14 -LRB- along with stable carbon-12 -RRB- .
|
TQA:T_0092_1
| 3 |
takes
| true |
take
|
[
"what",
"_",
"_",
"takes",
"something",
"_",
"_",
"?"
] |
[
"A living thing",
"living thing"
] |
[
[
0,
3
],
[
1,
3
]
] |
A living thing takes in carbon-14 -LRB- along with stable carbon-12 -RRB- .
|
TQA:T_0092_1
| 3 |
takes
| true |
take
|
[
"where",
"does",
"something",
"take",
"something",
"_",
"_",
"?"
] |
[
"in",
"along with stable carbon-12"
] |
[
[
4,
5
],
[
7,
11
]
] |
It decays quickly compared to some other unstable isotopes .
|
TQA:T_0092_11
| 1 |
decays
| true |
decay
|
[
"how",
"does",
"something",
"decay",
"_",
"_",
"_",
"?"
] |
[
"quickly"
] |
[
[
2,
3
]
] |
It decays quickly compared to some other unstable isotopes .
|
TQA:T_0092_11
| 1 |
decays
| true |
decay
|
[
"what",
"_",
"_",
"decays",
"_",
"_",
"_",
"?"
] |
[
"It"
] |
[
[
0,
1
]
] |
It decays quickly compared to some other unstable isotopes .
|
TQA:T_0092_11
| 3 |
compared
| true |
compare
|
[
"what",
"is",
"_",
"compared",
"_",
"_",
"_",
"?"
] |
[
"It"
] |
[
[
0,
1
]
] |
It decays quickly compared to some other unstable isotopes .
|
TQA:T_0092_11
| 3 |
compared
| true |
compare
|
[
"what",
"is",
"something",
"compared",
"_",
"to",
"_",
"?"
] |
[
"to some other unstable isotopes",
"other unstable isotopes"
] |
[
[
4,
9
],
[
6,
9
]
] |
So carbon - 14 dating is useful for specimens younger than 50,000 years old .
|
TQA:T_0092_12
| 4 |
dating
| true |
date
|
[
"how",
"is",
"something",
"dated",
"_",
"_",
"_",
"?"
] |
[
"is useful for specimens younger than 50,000 years old",
"carbon - 14",
"carbon - 14 dating"
] |
[
[
5,
14
],
[
1,
4
],
[
1,
5
]
] |
So carbon - 14 dating is useful for specimens younger than 50,000 years old .
|
TQA:T_0092_12
| 4 |
dating
| true |
date
|
[
"what",
"is",
"_",
"dated",
"_",
"_",
"_",
"?"
] |
[
"specimens younger than 50,000 years old",
"specimens",
"carbon - 14"
] |
[
[
8,
14
],
[
8,
9
],
[
1,
4
]
] |
But radiocarbon dating is very useful for more recent events .
|
TQA:T_0092_14
| 2 |
dating
| true |
date
|
[
"what",
"is",
"_",
"dated",
"_",
"_",
"_",
"?"
] |
[
"radiocarbon"
] |
[
[
1,
2
]
] |
But radiocarbon dating is very useful for more recent events .
|
TQA:T_0092_14
| 2 |
dating
| true |
date
|
[
"why",
"is",
"something",
"dated",
"_",
"_",
"_",
"?"
] |
[
"is very useful for more recent events",
"is very useful"
] |
[
[
3,
10
],
[
3,
6
]
] |
Carbon-14 dating is also limited to the remains of once-living things .
|
TQA:T_0092_16
| 1 |
dating
| true |
date
|
[
"what",
"is",
"_",
"dated",
"_",
"_",
"_",
"?"
] |
[
"Carbon-14",
"the remains of once-living things"
] |
[
[
0,
1
],
[
6,
11
]
] |
Carbon-14 dating is also limited to the remains of once-living things .
|
TQA:T_0092_16
| 4 |
limited
| true |
limit
|
[
"what",
"is",
"_",
"limited",
"_",
"to",
"something",
"?"
] |
[
"Carbon-14 dating"
] |
[
[
0,
2
]
] |
Carbon-14 dating is also limited to the remains of once-living things .
|
TQA:T_0092_16
| 4 |
limited
| true |
limit
|
[
"what",
"is",
"something",
"limited",
"_",
"to",
"_",
"?"
] |
[
"the remains of once-living things"
] |
[
[
6,
11
]
] |
To date rocks , scientists use other radioactive isotopes .
|
TQA:T_0092_17
| 5 |
use
| true |
use
|
[
"what",
"will",
"someone",
"use",
"_",
"_",
"_",
"?"
] |
[
"other radioactive isotopes"
] |
[
[
6,
9
]
] |
To date rocks , scientists use other radioactive isotopes .
|
TQA:T_0092_17
| 5 |
use
| true |
use
|
[
"who",
"will",
"_",
"use",
"something",
"_",
"_",
"?"
] |
[
"scientists"
] |
[
[
4,
5
]
] |
To date rocks , scientists use other radioactive isotopes .
|
TQA:T_0092_17
| 5 |
use
| true |
use
|
[
"why",
"will",
"someone",
"use",
"something",
"_",
"_",
"?"
] |
[
"To date rocks"
] |
[
[
0,
3
]
] |
As the carbon-14 decays , it is replaced with more carbon-14 .
|
TQA:T_0092_2
| 3 |
decays
| true |
decay
|
[
"what",
"_",
"_",
"decays",
"_",
"_",
"_",
"?"
] |
[
"carbon-14",
"the carbon-14",
"it"
] |
[
[
2,
3
],
[
1,
3
],
[
5,
6
]
] |
As the carbon-14 decays , it is replaced with more carbon-14 .
|
TQA:T_0092_2
| 7 |
replaced
| true |
replace
|
[
"what",
"is",
"_",
"replaced",
"_",
"_",
"_",
"?"
] |
[
"carbon-14",
"carbon-14",
"it"
] |
[
[
2,
3
],
[
10,
11
],
[
5,
6
]
] |
As the carbon-14 decays , it is replaced with more carbon-14 .
|
TQA:T_0092_2
| 7 |
replaced
| true |
replace
|
[
"why",
"is",
"something",
"replaced",
"_",
"_",
"_",
"?"
] |
[
"decays",
"the carbon-14 decays"
] |
[
[
3,
4
],
[
1,
4
]
] |
After the organism dies , it stops taking in carbon .
|
TQA:T_0092_3
| 3 |
dies
| true |
die
|
[
"what",
"_",
"_",
"dies",
"_",
"_",
"_",
"?"
] |
[
"the organism"
] |
[
[
1,
3
]
] |
After the organism dies , it stops taking in carbon .
|
TQA:T_0092_3
| 6 |
stops
| true |
stop
|
[
"what",
"does",
"something",
"stop",
"_",
"_",
"doing",
"?"
] |
[
"taking in carbon"
] |
[
[
7,
10
]
] |
After the organism dies , it stops taking in carbon .
|
TQA:T_0092_3
| 6 |
stops
| true |
stop
|
[
"what",
"_",
"_",
"stops",
"_",
"_",
"doing something",
"?"
] |
[
"the organism",
"it"
] |
[
[
1,
3
],
[
5,
6
]
] |
After the organism dies , it stops taking in carbon .
|
TQA:T_0092_3
| 6 |
stops
| true |
stop
|
[
"when",
"does",
"something",
"stop",
"_",
"_",
"doing something",
"?"
] |
[
"After",
"After the organism dies"
] |
[
[
0,
1
],
[
0,
4
]
] |
After the organism dies , it stops taking in carbon .
|
TQA:T_0092_3
| 7 |
taking
| true |
take
|
[
"what",
"isn't",
"_",
"taken",
"_",
"_",
"_",
"?"
] |
[
"carbon",
"in carbon"
] |
[
[
9,
10
],
[
8,
10
]
] |
After the organism dies , it stops taking in carbon .
|
TQA:T_0092_3
| 7 |
taking
| true |
take
|
[
"what",
"isn't",
"_",
"taking",
"something",
"_",
"_",
"?"
] |
[
"it"
] |
[
[
5,
6
]
] |
After the organism dies , it stops taking in carbon .
|
TQA:T_0092_3
| 7 |
taking
| true |
take
|
[
"when",
"isn't",
"something",
"taken",
"_",
"_",
"_",
"?"
] |
[
"After the organism dies"
] |
[
[
0,
4
]
] |
That includes carbon-14 .
|
TQA:T_0092_4
| 1 |
includes
| true |
include
|
[
"what",
"does",
"something",
"include",
"_",
"_",
"_",
"?"
] |
[
"carbon-14"
] |
[
[
2,
3
]
] |
That includes carbon-14 .
|
TQA:T_0092_4
| 1 |
includes
| true |
include
|
[
"what",
"_",
"_",
"includes",
"something",
"_",
"_",
"?"
] |
[
"That"
] |
[
[
0,
1
]
] |
The carbon-14 that is in its body continues to decay .
|
TQA:T_0092_5
| 7 |
continues
| true |
continue
|
[
"what",
"_",
"_",
"continues",
"_",
"_",
"_",
"?"
] |
[
"carbon-14"
] |
[
[
1,
2
]
] |
The carbon-14 that is in its body continues to decay .
|
TQA:T_0092_5
| 7 |
continues
| true |
continue
|
[
"what",
"does",
"something",
"continue",
"_",
"_",
"to do",
"?"
] |
[
"decay"
] |
[
[
9,
10
]
] |
So the organism contains less and less carbon-14 as time goes on .
|
TQA:T_0092_6
| 3 |
contains
| true |
contain
|
[
"what",
"_",
"_",
"contains",
"_",
"_",
"_",
"?"
] |
[
"organism",
"the organism"
] |
[
[
2,
3
],
[
1,
3
]
] |
So the organism contains less and less carbon-14 as time goes on .
|
TQA:T_0092_6
| 3 |
contains
| true |
contain
|
[
"what",
"is",
"_",
"contained",
"_",
"_",
"_",
"?"
] |
[
"less and less carbon-14"
] |
[
[
4,
8
]
] |
So the organism contains less and less carbon-14 as time goes on .
|
TQA:T_0092_6
| 3 |
contains
| true |
contain
|
[
"when",
"is",
"something",
"contained",
"_",
"_",
"_",
"?"
] |
[
"as time goes on"
] |
[
[
8,
12
]
] |
So the organism contains less and less carbon-14 as time goes on .
|
TQA:T_0092_6
| 10 |
goes
| true |
go
|
[
"how",
"does",
"something",
"go",
"_",
"_",
"_",
"?"
] |
[
"on"
] |
[
[
11,
12
]
] |
So the organism contains less and less carbon-14 as time goes on .
|
TQA:T_0092_6
| 10 |
goes
| true |
go
|
[
"what",
"_",
"_",
"goes",
"_",
"_",
"_",
"?"
] |
[
"time"
] |
[
[
9,
10
]
] |
We can estimate the amount of carbon-14 that has decayed by measuring the amount of carbon-14 to carbon-12 .
|
TQA:T_0092_7
| 2 |
estimate
| true |
estimate
|
[
"how",
"does",
"someone",
"estimate",
"something",
"_",
"_",
"?"
] |
[
"measuring the amount of carbon-14 to carbon-12",
"by measuring the amount of carbon-14 to carbon-12"
] |
[
[
11,
18
],
[
10,
18
]
] |
We can estimate the amount of carbon-14 that has decayed by measuring the amount of carbon-14 to carbon-12 .
|
TQA:T_0092_7
| 2 |
estimate
| true |
estimate
|
[
"what",
"does",
"someone",
"estimate",
"_",
"_",
"_",
"?"
] |
[
"the amount of carbon-14",
"the amount of carbon-14 that has decayed",
"amount of carbon-14 that has decayed"
] |
[
[
3,
7
],
[
3,
10
],
[
4,
10
]
] |
We can estimate the amount of carbon-14 that has decayed by measuring the amount of carbon-14 to carbon-12 .
|
TQA:T_0092_7
| 2 |
estimate
| true |
estimate
|
[
"who",
"_",
"_",
"estimates",
"something",
"_",
"_",
"?"
] |
[
"We"
] |
[
[
0,
1
]
] |
We can estimate the amount of carbon-14 that has decayed by measuring the amount of carbon-14 to carbon-12 .
|
TQA:T_0092_7
| 9 |
decayed
| true |
decay
|
[
"what",
"has",
"_",
"decayed",
"_",
"_",
"_",
"?"
] |
[
"carbon-14"
] |
[
[
6,
7
]
] |
We can estimate the amount of carbon-14 that has decayed by measuring the amount of carbon-14 to carbon-12 .
|
TQA:T_0092_7
| 11 |
measuring
| true |
measure
|
[
"how",
"is",
"something",
"measured",
"_",
"_",
"_",
"?"
] |
[
"the amount of carbon-14 to carbon-12",
"We can estimate the amount of carbon-14 that has decayed",
"by measuring the amount of carbon-14 to carbon-12"
] |
[
[
12,
18
],
[
0,
10
],
[
10,
18
]
] |
We can estimate the amount of carbon-14 that has decayed by measuring the amount of carbon-14 to carbon-12 .
|
TQA:T_0092_7
| 11 |
measuring
| true |
measure
|
[
"what",
"is",
"_",
"measured",
"_",
"_",
"_",
"?"
] |
[
"the amount of carbon-14 to carbon-12",
"the amount of carbon-14 that has decayed"
] |
[
[
12,
18
],
[
3,
10
]
] |
We know how fast carbon-14 decays .
|
TQA:T_0092_8
| 1 |
know
| true |
know
|
[
"what",
"does",
"someone",
"know",
"_",
"_",
"_",
"?"
] |
[
"how fast carbon-14 decays"
] |
[
[
2,
6
]
] |
We know how fast carbon-14 decays .
|
TQA:T_0092_8
| 1 |
know
| true |
know
|
[
"who",
"_",
"_",
"knows",
"something",
"_",
"_",
"?"
] |
[
"We"
] |
[
[
0,
1
]
] |
We know how fast carbon-14 decays .
|
TQA:T_0092_8
| 5 |
decays
| true |
decay
|
[
"what",
"_",
"_",
"decays",
"_",
"_",
"_",
"?"
] |
[
"carbon-14"
] |
[
[
4,
5
]
] |
With this information , we can tell how long ago the organism died .
|
TQA:T_0092_9
| 6 |
tell
| true |
tell
|
[
"how",
"does",
"someone",
"tell",
"something",
"_",
"_",
"?"
] |
[
"With this information"
] |
[
[
0,
3
]
] |
With this information , we can tell how long ago the organism died .
|
TQA:T_0092_9
| 6 |
tell
| true |
tell
|
[
"what",
"is",
"_",
"told",
"_",
"_",
"_",
"?"
] |
[
"we",
"how long ago the organism died"
] |
[
[
4,
5
],
[
7,
13
]
] |
With this information , we can tell how long ago the organism died .
|
TQA:T_0092_9
| 6 |
tell
| true |
tell
|
[
"who",
"_",
"_",
"tells",
"something",
"_",
"_",
"?"
] |
[
"we"
] |
[
[
4,
5
]
] |
With this information , we can tell how long ago the organism died .
|
TQA:T_0092_9
| 12 |
died
| true |
die
|
[
"what",
"_",
"_",
"died",
"_",
"_",
"_",
"?"
] |
[
"the organism"
] |
[
[
10,
12
]
] |
The isotopes in Table 11.1 are used to date igneous rocks .
|
TQA:T_0093_0
| 6 |
used
| true |
use
|
[
"what",
"is",
"something",
"used",
"_",
"for",
"_",
"?"
] |
[
"to date igneous rocks"
] |
[
[
7,
11
]
] |
The isotopes in Table 11.1 are used to date igneous rocks .
|
TQA:T_0093_0
| 6 |
used
| true |
use
|
[
"what",
"is",
"_",
"used",
"_",
"_",
"_",
"?"
] |
[
"The isotopes",
"isotopes",
"The isotopes in Table 11.1"
] |
[
[
0,
2
],
[
1,
2
],
[
0,
5
]
] |
Because they decay more slowly , they can be used to date much older specimens .
|
TQA:T_0093_2
| 9 |
used
| true |
use
|
[
"what",
"can",
"_",
"used",
"_",
"_",
"_",
"?"
] |
[
"they"
] |
[
[
6,
7
]
] |
Because they decay more slowly , they can be used to date much older specimens .
|
TQA:T_0093_2
| 9 |
used
| true |
use
|
[
"what",
"can",
"something",
"used",
"_",
"_",
"to do",
"?"
] |
[
"to date much older specimens",
"date much older specimens"
] |
[
[
10,
15
],
[
11,
15
]
] |
Because they decay more slowly , they can be used to date much older specimens .
|
TQA:T_0093_2
| 9 |
used
| true |
use
|
[
"why",
"can",
"something",
"used",
"_",
"_",
"to do something",
"?"
] |
[
"Because they decay more slowly"
] |
[
[
0,
5
]
] |
Which of these isotopes could be used to date a rock that formed half a million years ago ?
|
TQA:T_0093_3
| 6 |
used
| true |
use
|
[
"what",
"might",
"_",
"used",
"_",
"_",
"to do something",
"?"
] |
[
"these isotopes",
"isotopes"
] |
[
[
2,
4
],
[
3,
4
]
] |
Which of these isotopes could be used to date a rock that formed half a million years ago ?
|
TQA:T_0093_3
| 6 |
used
| true |
use
|
[
"what",
"might",
"something",
"used",
"_",
"_",
"to do",
"?"
] |
[
"date a rock that formed half a million years ago",
"to date a rock",
"to date a rock that formed half a million years ago"
] |
[
[
8,
18
],
[
7,
11
],
[
7,
18
]
] |
Which of these isotopes could be used to date a rock that formed half a million years ago ?
|
TQA:T_0093_3
| 8 |
date
| true |
date
|
[
"what",
"can",
"_",
"date",
"something",
"_",
"_",
"?"
] |
[
"these isotopes",
"isotopes"
] |
[
[
2,
4
],
[
3,
4
]
] |
Which of these isotopes could be used to date a rock that formed half a million years ago ?
|
TQA:T_0093_3
| 8 |
date
| true |
date
|
[
"what",
"can",
"something",
"date",
"_",
"_",
"_",
"?"
] |
[
"a rock",
"a rock that formed half a million years ago"
] |
[
[
9,
11
],
[
9,
18
]
] |
Which of these isotopes could be used to date a rock that formed half a million years ago ?
|
TQA:T_0093_3
| 12 |
formed
| true |
form
|
[
"what",
"_",
"_",
"formed",
"_",
"_",
"_",
"?"
] |
[
"a rock"
] |
[
[
9,
11
]
] |
Which of these isotopes could be used to date a rock that formed half a million years ago ?
|
TQA:T_0093_3
| 12 |
formed
| true |
form
|
[
"when",
"did",
"something",
"form",
"_",
"_",
"_",
"?"
] |
[
"half a million years ago"
] |
[
[
13,
18
]
] |
Unstable Isotope Decays to At a Half-Life of -LRB- years -RRB- Potassium-40 Uranium-235 Uranium-238 Argon-40 Lead-207 Lead-206 1.3 billion 700 million 4.5 billion Dates Rocks Aged -LRB- years old -RRB- 100 thousand - 1 billion 1 million - 4.5 billion 1 million - 4.5 billion
|
TQA:T_0093_4
| 2 |
Decays
| true |
decay
|
[
"what",
"_",
"_",
"decays",
"_",
"_",
"_",
"?"
] |
[
"Unstable Isotope"
] |
[
[
0,
2
]
] |
Unstable Isotope Decays to At a Half-Life of -LRB- years -RRB- Potassium-40 Uranium-235 Uranium-238 Argon-40 Lead-207 Lead-206 1.3 billion 700 million 4.5 billion Dates Rocks Aged -LRB- years old -RRB- 100 thousand - 1 billion 1 million - 4.5 billion 1 million - 4.5 billion
|
TQA:T_0093_4
| 2 |
Decays
| true |
decay
|
[
"what",
"does",
"something",
"decay",
"_",
"to",
"_",
"?"
] |
[
"At a Half-Life of -LRB- years -RRB-",
"At a Half-Life"
] |
[
[
4,
11
],
[
4,
7
]
] |
Our solar system began about 5 billion years ago .
|
TQA:T_0094_0
| 3 |
began
| true |
begin
|
[
"what",
"_",
"_",
"began",
"_",
"_",
"_",
"?"
] |
[
"Our solar system",
"solar system"
] |
[
[
0,
3
],
[
1,
3
]
] |
Our solar system began about 5 billion years ago .
|
TQA:T_0094_0
| 3 |
began
| true |
begin
|
[
"when",
"did",
"something",
"begin",
"_",
"_",
"_",
"?"
] |
[
"about 5 billion years ago",
"5 billion years ago ."
] |
[
[
4,
9
],
[
5,
10
]
] |
The Sun , planets and other solar system objects all formed at about the same time .
|
TQA:T_0094_1
| 10 |
formed
| true |
form
|
[
"what",
"_",
"_",
"formed",
"_",
"_",
"_",
"?"
] |
[
"all",
"The Sun , planets and other solar system objects"
] |
[
[
9,
10
],
[
0,
9
]
] |
The Sun , planets and other solar system objects all formed at about the same time .
|
TQA:T_0094_1
| 10 |
formed
| true |
form
|
[
"when",
"did",
"something",
"form",
"_",
"_",
"_",
"?"
] |
[
"at about the same time"
] |
[
[
11,
16
]
] |
The Sun and planets formed from a giant cloud of gas and dust .
|
TQA:T_0095_0
| 4 |
formed
| true |
form
|
[
"what",
"_",
"_",
"formed",
"_",
"from",
"something",
"?"
] |
[
"The Sun and planets"
] |
[
[
0,
4
]
] |
The cloud contracted and began to spin .
|
TQA:T_0095_2
| 2 |
contracted
| true |
contract
|
[
"what",
"_",
"_",
"contracted",
"_",
"_",
"_",
"?"
] |
[
"The cloud"
] |
[
[
0,
2
]
] |
The cloud contracted and began to spin .
|
TQA:T_0095_2
| 4 |
began
| true |
begin
|
[
"what",
"_",
"_",
"began",
"_",
"_",
"to do something",
"?"
] |
[
"The cloud",
"cloud"
] |
[
[
0,
2
],
[
1,
2
]
] |
The cloud contracted and began to spin .
|
TQA:T_0095_2
| 4 |
began
| true |
begin
|
[
"what",
"did",
"something",
"begin",
"_",
"_",
"to do",
"?"
] |
[
"spin"
] |
[
[
6,
7
]
] |
The cloud contracted and began to spin .
|
TQA:T_0095_2
| 6 |
spin
| true |
spin
|
[
"what",
"was",
"_",
"spinning",
"_",
"_",
"_",
"?"
] |
[
"The cloud"
] |
[
[
0,
2
]
] |
As it contracted , its temperature and pressure increased .
|
TQA:T_0095_3
| 2 |
contracted
| true |
contract
|
[
"what",
"_",
"_",
"contracted",
"_",
"_",
"_",
"?"
] |
[
"it"
] |
[
[
1,
2
]
] |
As it contracted , its temperature and pressure increased .
|
TQA:T_0095_3
| 8 |
increased
| true |
increase
|
[
"what",
"_",
"_",
"increased",
"_",
"_",
"_",
"?"
] |
[
"its temperature",
"pressure",
"its temperature and pressure"
] |
[
[
4,
6
],
[
7,
8
],
[
4,
8
]
] |
As it contracted , its temperature and pressure increased .
|
TQA:T_0095_3
| 8 |
increased
| true |
increase
|
[
"when",
"did",
"something",
"increase",
"_",
"_",
"_",
"?"
] |
[
"As it contracted"
] |
[
[
0,
3
]
] |
The cloud spun faster , and formed into a disk .
|
TQA:T_0095_4
| 2 |
spun
| true |
spin
|
[
"how",
"did",
"something",
"spin",
"_",
"_",
"_",
"?"
] |
[
"faster"
] |
[
[
3,
4
]
] |
The cloud spun faster , and formed into a disk .
|
TQA:T_0095_4
| 2 |
spun
| true |
spin
|
[
"what",
"_",
"_",
"spun",
"_",
"_",
"_",
"?"
] |
[
"The cloud",
"cloud"
] |
[
[
0,
2
],
[
1,
2
]
] |
The cloud spun faster , and formed into a disk .
|
TQA:T_0095_4
| 6 |
formed
| true |
form
|
[
"what",
"did",
"something",
"form",
"_",
"into",
"_",
"?"
] |
[
"disk",
"into a disk",
"a disk"
] |
[
[
9,
10
],
[
7,
10
],
[
8,
10
]
] |
The cloud spun faster , and formed into a disk .
|
TQA:T_0095_4
| 6 |
formed
| true |
form
|
[
"what",
"_",
"_",
"formed",
"_",
"into",
"something",
"?"
] |
[
"The cloud",
"cloud"
] |
[
[
0,
2
],
[
1,
2
]
] |
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