Science
9th Grade
NGSS covered
Used 2+ times
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32 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
After the third half-life, how much of the sample is left?
1/2
1/3
1/16
1/8
Tags
NGSS.HS-PS1-8
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?
3.0g
0.25mg
0.3g
0.25g
Tags
NGSS.HS-PS1-8
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years.
How many grams are left after 1 half life?
100 grams
25 grams
2 grams
50 grams
Tags
NGSS.HS-PS1-8
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which type of nuclear radiation is being emitted here?
Alpha
beta
gamma
none
Tags
NGSS.HS-PS1-8
5.
MATCH QUESTION
1 min • 1 pt
You have 100 grams of radioactive C-14. The half life of C-14 is 5715 years.
How many grams are left after each half life?
6.25g or 1/16
3 half lives
25g or 1/4
1 half life
50g or 1/2
2 half lives
12.5g or 1/8
4 half lives
Tags
NGSS.HS-PS1-8
6.
MATH RESPONSE QUESTION
1 min • 1 pt
An isotope of cesium 138 has a half-life of 30 years. If 1.00 g of cesium-138 disintegrates over a period of 90 years, how many grams of cesium-138 would remain?
Mathematical Equivalence
ON
Tags
NGSS.HS-PS1-8
7.
MATCH QUESTION
1 min • 1 pt
Ge-81 emits beta particles and has a half-life of 7.6 seconds.
Determine the time required for a 16.00-gram sample of Ge-81 to decay until only 1.00 gram of the sample remains unchanged.
1/4 radioactive
1 grams
Completely radioactive
16 grams
1/8 radioactive
4 grams
1/2 radioactive
2 grams
1/16 radioactive
8 grams
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