Physical Science Chapter 10 Lesson1 Questions

Who discovered radioactivity by placing uranium salts on a photographic plate?

• Marie Curie

• Pierre Curie

• Henri Becquerel

• Albert Einstein

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Henri Becquerel shared the 1903 Nobel Prize for Physics with Marie and ________.

• Albert Einstein

• Pierre Curie

• Isaac Newton

• Niels Bohr

What happens during nuclear decay?

• Atoms of one element change into atoms of a different element.

• Atoms remain the same.

• Atoms disappear.

• Atoms split into smaller atoms.

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During nuclear decay, atoms of one element can change into atoms of a ________ element altogether.

• similar

• different

• identical

• smaller

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What is radioactivity?

• The process in which a stable atomic nucleus emits charged particles and energy.

• The process in which an unstable atomic nucleus emits charged particles and energy.

• The process in which an unstable atomic nucleus absorbs charged particles and energy.

• The process in which a stable atomic nucleus absorbs charged particles and energy.

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Any atom containing an unstable nucleus is called a ________.

• stable isotope

• radioactive isotope

• neutral isotope

• inert isotope

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What method did scientists use to determine the age of the mammoth remains found in Hot Springs, South Dakota?

• Carbon-12 dating

• Carbon-14 dating

• Uranium dating

• Potassium-argon dating

About how many years ago did more than 100 mammoths die at a sinkhole in Hot Springs, South Dakota?

• 10,000 years

• 26,000 years

• 50,000 years

• 100,000 years

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What is nuclear decay?

• A process where stable isotopes change

• A process where radioisotopes change into other isotopes

• A process where isotopes remain unchanged

• A process where isotopes are created.

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Uranium-238 decays into _________.

• Carbon-12

• Oxygen-16

• Thorium-234

• Uranium-235

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