5.3h

Can you eat parts of some plants?

• True

• False

What are some Examples of stems and leaves?

• Cucumber

  Peas

• Spinach cabbage sugar cane

• Rose sunflower grass

• Nuts wheat flour

• Choclate cookie nuggets burger

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Match the following

• B

• Transpiration

• A

• Condensation

• C

• Evaporation

• D

• Precipitation

Tags

NGSS.MS-ESS2-4

What is the half-life of a radioactive substance 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

A scientist measures the decay of a radioactive isotope and finds that it takes 5.3 hours for the sample to reduce to half its original mass. What is this time period called?

• Decay constant

• Half-life

• Mean life

• Radioactive period

Tags

NGSS.HS-PS1-8

If a radioactive element has a half-life of 5.3 hours, how much of a 100g sample remains after 10.6 hours?

• 50g

• 25g

• 12.5g

• 75g

A sample of a radioactive isotope is observed to decay to one-eighth of its original amount in 15.9 hours. What is the half-life of the isotope?

• 5.3 hours

• 7.95 hours

• 10.6 hours

• 3.975 hours

Tags

NGSS.HS-PS1-8

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 lose all its energy

• The time it takes for a substance to become non-radioactive

Tags

NGSS.HS-PS1-8

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

Tags

NGSS.HS-PS1-8

In a laboratory experiment, a scientist observes that a radioactive sample decreases to 12.5% of its original activity in 15.9 hours. What is the half-life of the sample?

• 5.3 hours

• 10.6 hours

• 3.975 hours

• 7.95 hours

Tags

NGSS.HS-PS1-8