Science Bowl #2 - Review 9-15

What happens to an object when unbalanced forces act on it?

• The object's motion does not change

• The object will move

• The object will increase in mass

• The object will become weightless

What is the result when balanced forces act on an object?

• The object will start moving in the direction of the larger force

• The object will move in a circular path

• The object's motion does not change

• The object will accelerate

According to Newton's first law of motion, what will an object at rest do?

• It will move at a constant velocity

• It will accelerate

• It will stay at rest

• It will decrease in mass

What does Newton's second law of motion, F=ma, imply about force and mass?

• More mass requires less force to accelerate

• More mass requires the same force to accelerate

• More mass requires more force to accelerate

• Mass has no effect on the force required to accelerate

What is the relationship between action and reaction forces according to Newton's third law of motion?

• They are equal in magnitude and opposite in direction

• They are equal in magnitude and same in direction

• They are unequal in magnitude and opposite in direction

• They are unequal in magnitude and same in direction

What is potential energy?

• The energy of motion.

• The energy stored in an object.

• The energy of heat.

• The energy of light.

Which of the following is an example of kinetic energy?

• A charged battery.

• Water behind a dam.

• A windmill spinning.

• A stretched spring or rubber band.

What does the Law of Conservation of Energy state?

• Energy can be created and destroyed.

• Energy can only be converted from one form to another.

• Energy is only found in mechanical and sound forms.

• Energy is not conserved in any processes.

What are biotic factors in an ecosystem?

• Things that have NEVER been alive, such as rocks.

• Nonliving components of an ecosystem.

• Living components of an ecosystem.

• Things that were once alive, such as a rotting log.

What percentage of energy is passed on to the next energy level in an ecosystem?

• 10%

• 90%

• 50%

• 70%