What happens to the motion of an object when the forces acting on it are balanced?
The motion does not change
100
As a ball rolls down a hill, it has less potential energy than it did at the top of the hill. Some of the ball's potential energy has ____________.
changed to kinetic energy
100
Which organ system removes wastes?
Excretory
100
Is air a biotic or abiotic factor in the environment?
abiotic
100
Bedichek Middle School
Bobcats
200
What happens to an object if the forces acting on it are unbalanced?
Its motion changes
200
A flashlight is an example of what type of energy transformation?
chemical energy in to light energy
200
What is the main function of the integumentary system?
To prevent harmful materials from entering the body.
200
Is a rotting log a biotic or abiotic factor in an ecosystem?
biotic
200
Paredes Middle School
Pumas
300
If you apply a constant force on 1 N on a book to pick it up from the floor and set it on a desk 1 m high, how much work did you do on the book?
1 joule
300
Earth receives energy from the sun by ____________ .
Radiation
300
In which organ does chemical digestion of food begin?
mouth
300
Which of these would be most likely to grow first on a small island that was formed by a volcanic eruption?
A. climbing vine
B. hardwood tree
C. bush
D. Lichen
D
300
Clint Small Middle School
Cougars
400
What does a simple machine do?
It makes work easier.
400
In what direction does heat move?
from warmer areas to cooler areas
400
What type of tissue contracts to allow movement?
muscle
400
Which of the following is not a possible cause of ecological succession?
A. fire
B. flood
C. earthquake
D. change of seasons
D
400
Mills Elementary School
Mountain Lions
500
Name 3 simple machines.
Any three of the following: inclined plane, wedge, screw, pulley, wheel and axle, lever
500
Which two sources of energy depend directly on moving water?
hydroelectric and tidal
500
What is the name of the gland that releases digestive enzymes and other chemicals into the small intestine?
the pancreas
500
Which of these environments has the most biodiversity?
A. tropical rain forest
B. a polar ice cap
C. a desert
D. a stream