Question 1

Under what circumstances could Earth be considered a closed system?

Accepted Answer

If the matter and energy of Earth could not freely exchange with space outside the realm of the Earth, this would be a closed system. Obviously, the Earth is not a closed system because the Earth receives energy from the Sun and mass from space (meteorites, etc.).

Question 2

To calculate how many calories your body needs to maintain your current weight for a week, you need to know all of the following except:

Accepted Answer

A)  your current weight. 
B)  the approximate amount of energy you expend each day. 
C)  the number of calories used daily for normal body maintenance. 
D)  the recommended weight for your height. 
E)  the number of days in the week. 
A)  your current weight. 
B)  the approximate amount of energy you expend each day. 
C)  the number of calories used daily for normal body maintenance. 
D)  the recommended weight for your height. 
E)  the number of days in the week. D

Question 3

What did James Prescott Joule discover about heat?

Accepted Answer

A)  Heat is a form of energy. 
B)  Potential energy equals heat. 
C)  Calories should be limited to energy required. 
D)  Brass tools work better under water. 
E)  Horses expend energy at a rate of 550 foot-pound/second. 
A)  Heat is a form of energy. 
B)  Potential energy equals heat. 
C)  Calories should be limited to energy required. 
D)  Brass tools work better under water. 
E)  Horses expend energy at a rate of 550 foot-pound/second. A

Question 4

Energy can be stored in a flashlight battery as:

Accepted Answer

A)  electrical energy. 
B)  chemical potential energy. 
C)  heat energy. 
D)  gravitational potential energy. 
E)  electromagnetic energy. 
A)  electrical energy. 
B)  chemical potential energy. 
C)  heat energy. 
D)  gravitational potential energy. 
E)  electromagnetic energy.

Question 5

What is a foot-pound?

Accepted Answer

A foot-pound is the unit of force (or wo

Question 6

What kind of energy does the pounding of ocean surf demonstrate?

Accepted Answer

A)  kinetic energy 
B)  potential energy 
C)  sound energy 
D)  heat energy 
E)  mechanical energy 
A)  kinetic energy 
B)  potential energy 
C)  sound energy 
D)  heat energy 
E)  mechanical energy

Question 7

Potential energy is defined as:

Accepted Answer

A)  mass times height times gravity. 
B)  mass times speed times gravity. 
C)  mass times gravity times energy. 
D)  meters times heat times gravity. 
E)  meters times time times energy. 
A)  mass times height times gravity. 
B)  mass times speed times gravity. 
C)  mass times gravity times energy. 
D)  meters times heat times gravity. 
E)  meters times time times energy.

Question 8

What would be the ecological impact if the first trophic level were eliminated?

Accepted Answer

Without plants at the first tr

Question 9

Stretching a rubber band and shooting it across the room is an example of releasing:

Accepted Answer

A)  electrical potential energy. 
B)  kinetic energy. 
C)  chemical energy. 
D)  heat energy. 
E)  elastic potential energy. 
A)  electrical potential energy. 
B)  kinetic energy. 
C)  chemical energy. 
D)  heat energy. 
E)  elastic potential energy.

Question 10

Lighting a fire with a match uses which kinds of energy?

Accepted Answer

A)  chemical and kinetic 
B)  electrical and chemical 
C)  kinetic and heat 
D)  chemical and electrical 
E)  radioactive and potential 
A)  chemical and kinetic 
B)  electrical and chemical 
C)  kinetic and heat 
D)  chemical and electrical 
E)  radioactive and potential

Question 11

Explain how mass can be converted to energy.

Accepted Answer

Answers may vary. Students cou

Question 12

The top of the Earth's atmosphere receives 1.79 X 1017 joules of energy per second; however less than half of that amount ever reaches the ground. Where is this energy lost?

Accepted Answer

About 25 percent is reflected

Question 13

Which of the following is a rate?

Accepted Answer

A)  joule 
B)  foot-pound 
C)  power 
D)  energy 
E)  newton 
A)  joule 
B)  foot-pound 
C)  power 
D)  energy 
E)  newton

Question 14

The energy stored in all fossil fuels was originally in:

Accepted Answer

A)  dinosaur bones. 
B)  meteors. 
C)  Earth's ocean. 
D)  uranium deposits. 
E)  the Sun. 
A)  dinosaur bones. 
B)  meteors. 
C)  Earth's ocean. 
D)  uranium deposits. 
E)  the Sun.

Question 15

Paleontologists have recently proposed that dinosaurs were warm-blooded. Discuss this viewpoint using trophic level principles.

Accepted Answer

Answers should include carnivo

Question 16

Which of the following balls would have the greatest amount of kinetic energy if they are all traveling at 10 m/s?

Accepted Answer

A)  baseball 
B)  ping pong ball 
C)  bowling ball 
D)  soccer ball 
E)  basketball 
A)  baseball 
B)  ping pong ball 
C)  bowling ball 
D)  soccer ball 
E)  basketball

Question 17

The watt value printed on a light bulb tells the amount of energy the light bulb is using in joules per second. Which one of the following light bulbs is using the most energy?

Accepted Answer

A)  100-watt bulb that burns for twenty minutes 
B)  75-watt bulb that burns for thirty minutes 
C)  60-watt bulb that burns for one hour 
D)  40-watt bulb that burns for two hours 
E)  25-watt bulb left on for three hours 
A)  100-watt bulb that burns for twenty minutes 
B)  75-watt bulb that burns for thirty minutes 
C)  60-watt bulb that burns for one hour 
D)  40-watt bulb that burns for two hours 
E)  25-watt bulb left on for three hours

Question 18

What are the problems of converting from a fossil-fuel based society to one that relies on alternative energy sources? Explain.

Accepted Answer

The infrastructure d

Question 19

What is the main difference in diet for organisms at the second trophic level versus the third trophic level?

Accepted Answer

Organisms at the second trophi

Question 20

Define joule and give its proper units.

Accepted Answer

Joule is the amount of work do

Exam 3: Energy: Why Must Animals Eat to Stay Alive

Under what circumstances could Earth be considered a closed system?

To calculate how many calories your body needs to maintain your current weight for a week, you need to know all of the following except:

What did James Prescott Joule discover about heat?

Energy can be stored in a flashlight battery as:

What is a foot-pound?

What kind of energy does the pounding of ocean surf demonstrate?

Potential energy is defined as:

What would be the ecological impact if the first trophic level were eliminated?

Stretching a rubber band and shooting it across the room is an example of releasing:

Lighting a fire with a match uses which kinds of energy?

Explain how mass can be converted to energy.

The top of the Earth's atmosphere receives 1.79 X 1017 joules of energy per second; however less than half of that amount ever reaches the ground. Where is this energy lost?

Which of the following is a rate?

The energy stored in all fossil fuels was originally in:

Paleontologists have recently proposed that dinosaurs were warm-blooded. Discuss this viewpoint using trophic level principles.

Which of the following balls would have the greatest amount of kinetic energy if they are all traveling at 10 m/s?

The watt value printed on a light bulb tells the amount of energy the light bulb is using in joules per second. Which one of the following light bulbs is using the most energy?

What are the problems of converting from a fossil-fuel based society to one that relies on alternative energy sources? Explain.

What is the main difference in diet for organisms at the second trophic level versus the third trophic level?

Define joule and give its proper units.

Science: a Way of Knowing: How Do You Know What You Know

The Ordered Universe: Why Do Planets Appear to Wander Slowly Across the Sky

Heat and the Second Law of Thermodynamics: Why Is It Easier to Make an Omelet From an Egg Than to Make an Egg From an Omelet

Electricity and Magnetism: What Is Lightning

Waves and Electromagnetic Radiation: What Is Color

Albert Einstein and the Theory of Relativity: Can a Human Ever Travel Faster Than the Speed of Light, at Warp Speed

The Atom: Why Are There so Many Different Materials in the World

Quantum Mechanics: How Can the Electron Behave Like Both a Particle and a Wave

Atoms in Combination: the Chemical Bond: How Does Blood Clot

Materials and Their Properties: How Have Computers Gotten so Much Faster

The Nucleus of the Atom: How Do Scientists Determine the Age of the Oldest Human Fossils

The Ultimate Structure of Matter: How Can Antimatter Be Used to Probe the Human Brain

The Stars: How Much Longer Can the Sun Sustain Life on Earth

Cosmology: Will the Universe End

Earth and Other Planets: Is Earth the Only Planet With Life

Plate Tectonics: Can We Predict Destructive Earthquakes

Earths Many Cycles: Will We Ever Run Out of Fresh Water

Ecology, Ecosystems, and the Environment: Are Human Activities Affecting the Global Environment

Strategies of Life: What Is Life

The Living Cell: What Is the Smallest Living Thing

Molecules of Life: What Constitutes a Healthy Diet

Classical and Modern Genetics: Why Do Offspring Resemble Their Parents

The New Science of Life: Can We Cure Cancer

Evolution: How Did Life Emerge on the Ancient Earth

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The top of the Earth's atmosphere receives 1.79 X 10¹⁷ joules of energy per second; however less than half of that amount ever reaches the ground. Where is this energy lost?