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Half Life Energy

TransformationEnergy

PotpourriHeatRadio-

activity

If a radioactive material has a half life of 10 years, what fraction of the material will

remain after 30 years?

Half Life for $100

A. 1/2 B. 1/4 C. 1/8 D. 1/16

C. One eighth

1/8

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Radon-222 has a half life of 4 days. If ¼ of the original sample remain, how much time has passed?

Half Life for $200

A. 1 day B. 16 days C. 8 days D. 4 days

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C. 8 days

Half Life for $300

The half-life of carbon-14 is 5730 years. How much of an 80g sample will remain after 17,190 years?

A. 40 g B. 80 g C. 20 gD. 10 g

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D. 10 grams

Because 3 half-lives have passed

Half Life for $400An original sample of the radioisotopefluorine-21 had a mass of 80.0 milligrams. Only 20.0 milligrams of this original sample remain unchanged after 8.32 seconds. What is the half-life of fluorine-21?

A. 1.04 s B. 2.08 s C. 4.16 s D. 8.32 s

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C. 4.16 s

Half Life for $500U-235 has a half-life of 704 million years. A sample of rock was found to contain ¼ of the U-235 atoms present when it formed. What is the approximate age of the rock?

A. 1.4 billion years

B. 704 million years

C. 352 million years

D. 2.8 billion years

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A. 1.4 billion years

(2 half-lives passed)

Energy Transformation for $100What do a toaster, a hair dryer, and

an iron have in common?A. They convert electrical energy to heat energy.

B. They convert electrical energy to mechanical energy.

C. They convert mechanical energy to electrical energy.

D. They convert heat to electrical energy.

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A. They convert electrical energy to heat energy.

Energy Transformation for $200

Which best describes the energy transformation that takes place in the picture below?

A. Light to Heat

B. Mechanical to Chemical

C. Chemical to Light

D. Electrical to Light

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C. Chemical to Light

Energy Transformation for $300A pendulum bob swings back and forth in an

arc. Which describes the energy conversion process in one swing of the pendulum from left to right.

A. Kinetic energy to chemical energy to potential energy

B. Kinetic energy to potential energy back to kinetic energyC. Potential energy to kinetic energy back to potential energyD. Potential energy to kinetic energy to electromagnetic energy

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C. Potential energy to kinetic energy back to potential energy

Energy Transformation for $400

Which best describes the energy transformation that takes place in the picture below?

A. Mechanical to Light

B. Heat to Sound

C. Heat to Mechanical

D. Sound to Light

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B. Heat to Sound

Energy Transformation for $500Heterotrophs consume food to obtain energy

for biological processes. During exercise, the chemical energy in food is transformed into what other forms of energy?

A. Potential and electrical energy

B. Electromagnetic and heat energy

C. Mechanical, kinetic, and heat energy

D. Potential, electromagnetic, and heat energy

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C. Mechanical, kinetic, and heat

energy

Radioactivity for $100

The three main types of nuclear radiation are alpha, beta, and gamma. List the three types of

radiation from highest penetrating power to lowest

penetrating power?

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Gamma, Beta, Alpha

Radioactivity for $200

What is a problem commonly associated with nuclear power facilities? A. A small quantity of energy is produced.B. Reaction products contribute to acid rain.C. It is impossible to control nuclear fission.D. It is difficult to dispose of wastes.

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D. It is difficult to dispose of wastes.

Radioactivity for $300

An alpha particle is the same as a

A. Helium nucleusB. Hydrogen nucleusC. Beta particleD. Gamma ray

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A. Helium nucleus

Radioactivity for $400

The final elements produced by radioactive decay differ from the original radioactive elements because the nuclei of the final elements are always A. more stable. B. increased in mass. C. half as radioactive. D. positively charged.

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A. more stable.

Radioactivity for $500

Which would penetrate a car door made of aluminum?

A.Alpha particles

B.Beta particles

C.Gamma rays

D.Helium nuclei

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C. Gamma rays

Energy for $100

Nuclear fission produces energy when __

A.Two atomic nuclei combine

B.An atomic nucleus splits

C.A chemical reaction occurs

D.Helium transmutes into hydrogen

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B. An atomic nucleus splits

Energy for $200Turbines from a hydroelectric dam convert what type of energy into electrical energy?

A.Chemical

B.Sound

C.Mechanical

D.Light

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C. Mechanical

Energy for $300

Two 1kg apples hang from a tree branch, one near the top of the tree and the other on a lower branch. Which apple has the most gravitational

potential energy?

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The apple near the top of the tree

Energy for $400

Which of the following is an example of light energy being converted into chemical energy?A. The sun unevenly heating Earth’s surfaceB. Water evaporating and condensing in the water cycleC. Plants producing sugar during the dayD. Lava erupting from volcanoes for many days

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C. Plants producing sugar during the day

Energy for $500

How can you increase the kinetic energy of a pickup truck without

increasing the truck’s speed?

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Increase the truck’s mass

Heat for $100

The transfer of heat by the movement of air currents in Earth’s atmosphere is an example of —

A. conductionB. convectionC. radiationD. fusion

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B. convection

Heat for $200

Between points 2 and 3, energy is being used to —

A. melt ice B. heat waterC. evaporate waterD. heat water vapor

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A. melt ice

Heat for $300A man who was sleeping wakes up because he hears the smoke alarm go off in his house. Before opening the bedroom door, the man feels the door to see whether it is warm. He is assuming that heat would be transferred through the door by —

A. conductionB. convectionC. radiationD. compression

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A. conduction

Heat for $400Ms. Markas takes a thermos bottle filled with hot coffee to work each day. The thermos bottle keeps the coffee hot by

A.Using a battery powered heating elementB.Collecting solar heat energyC.Recirculating hot air insideD.Slowing heat transfer

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D. Slowing heat transfer

Heat for $500

Suppose four pieces of metal, with masses 10g, 100g, 500g, and 1kg, are heated.

According to the equation Q=mct, which piece of metal requires the most heat energy to go from 10 oC to 20 oC?

1 kg piece of metal

(remember 1 kg = 1000 g)

How much do you want to risk?

How much do you want to risk?

What are 3 things you can do to help make sure you do well on

your GHSGT?

1. Pay attention in class and study

2. Get plenty of rest

3. Eat a good breakfast

Which team won?