
5.3h
Authored by Lisa Thompson
Science
3rd Grade
NGSS covered

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15 questions
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1.
MATCH QUESTION
1 min • 3 pts
Identify an example of each of the three states of matter present when the candle is burning.
The hard wax of the candle
Liquid
The melting wax
Gas
The fire/flame
Solid
Tags
NGSS.5-PS1-3
2.
LABELLING QUESTION
1 min • 6 pts
List the steps of the scientific method
Form a hypothesis
Analyze results
Draw conclusions
Conduct experiment
Communicate results
Ask a question
Tags
NGSS.HS-PS1-3
NGSS.HS-PS3-4
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the half-life of a radioactive isotope if it decays to 25% of its original amount in 5.3 hours?
2.65 hours
5.3 hours
10.6 hours
1.325 hours
Tags
NGSS.HS-PS1-8
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A scientist measures the decay of a substance and finds that it reduces to half its quantity in 5.3 hours. What is this time period called?
Decay constant
Half-life
Full-life
Quarter-life
Tags
NGSS.HS-PS1-8
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If a sample of a radioactive element has a half-life of 5.3 hours, how much of a 100g sample will remain after 10.6 hours?
50g
25g
12.5g
75g
Tags
NGSS.HS-PS1-8
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following best describes the concept of half-life in radioactive decay?
The time it takes for a substance to completely decay
The time it takes for half of the radioactive atoms to decay
The time it takes for a substance to double in quantity
The time it takes for a substance to reach a stable state
Tags
NGSS.HS-PS1-8
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A radioactive isotope has a half-life of 5.3 hours. How many half-lives have passed after 21.2 hours?
2
3
4
5
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