In which way are evaporation and condensation similar?
A. Both cause decreases in air temperature
B. Both cause increases in air temperature
C. Both are caused by the warming of the atmosphere
D. Both are caused by changes in heat energy
What is D. Both are caused by changes in heat energy
100
Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop it's motion?
A. ball with a mass of 5 kg
B. ball with a mass of 10 kg
C. ball with a mass of 15 kg
D. ball with a mass of 20 kg
What is D. ball with a mass of 20 kg
100
Which is an example of a single-celled organism?
A. amoeba
B. insect
C. fish
D. worm
What is A. amoeba
100
Which is a function of the cardiovascular system?
A. to move water throughout the body
B. to provide structural support for the body
C. to eliminate waste from the body
D. to transport gases throughout the body
What is D. to transport gases throughout the body
100
Which organism is a producer?
A. frog
B. mushroom
C. grass
D. lizard
What is C. grass
200
Which best describes why winds at the beach change direction between day and night?
A. Because the temperatures over land and over water change
B. Because warm air over land sinks and stays in place over land
C. Because cool air rises and is replaced by warm air from the ocean
D. Because cool air sinks and stays in place over land
What is A. Because the temperatures over land and over water change
200
A girl walked for 30 minutes. She noticed that she traveled farther in the first 15 minutes. What can she conclude about her walk?
A. She walked over many hills
B. Her average speed was faster during the first half of her walk
C. She walked in two different directions
D. She was walking at a constant speed
What is B. Her average speed was faster during the first half of her walk
200
Why do multicellular organisms need to transport systems?
A. Most have cells that are not able to exchange gases with the outside environment
B. Most have cells that are unable to grow and survive in their environment
What is A. Most have cells that are not able to exchange gases with the outside environment
200
Which body system sends electrical signals to all other body systems?
A. circulatory system
B. digestive system
C. muscular system
D. nervous system
What is D. nervous system
200
Which is most responsible for recycling dead plants and animals in an ecosystem?
A. water
B. bacteria
C. fish
D. insects
What is B. bacteria
300
Which will most likely result from a low-pressure weather system?
A. warm temperatures
B. cloudy conditions
C. clear conditions
D. cool temperatures
What is B. cloudy conditions
300
Which best describes the speed of a ball as it is thrown straight up into the air and comes back down?
A. The ball goes slower and slower as it goes up, stops, and then goes faster and faster as it comes down.
B. The ball goes slower and slower as it goes up, stops, and then comes down at a constant speed.
What is A. the ball goes slower and slower as it goes up, stops, and then goes faster and faster as it comes down.
300
Matt is a tall, eleven-year-old boy. He has a scar on his right cheek. He is intelligent and an excellent drummer. Which of his traits did he most likely inherit?
A. his height
B. the scar on his right cheek
C. his intelligence
D. his ability to play the drums
What is A. his height
300
How would the woodpecker population in a forest area most likely be affected if a housing development is built in that area?
A. They would produce more offspring
B. They would change the color of their feathers
C. They would experience a decrease in available food
D. They would experience a decrease in competition
What is C. They would experience a decrease in available food
400
Which is the best explanation for how air masses move across the United States?
A. The prevailing westerlies move air masses from west to east across the United States but may be deflected by the jet stream.
B. The warm air of the Gulf Stream causes air masses to move from the Atlantic Ocean to the Pacific Ocean
What is A. The prevailing westerlies move air masses from west to east across the United States but may be deflected by the jet stream.
400
What can cause a moving object to increase its speed in a forward direction?
A. a force pushing on the object from the opposite direction
B. a force that continually acts on the object in the direction the object is moving
C. an increase in the mass of the object
What is B. a force that continually acts on the object in the direction the object is moving
400
What characteristic would a child not inherit from one or both of its parents?
A. freckles
B. hair style
C. eye color
D. dimples
What is B. hair style
400
Which system of the human body provides protection to most of the major organs?
A. skeletal system
B. circulatory system
C. respiratory system
D. muscular system
What is A. skeletal system
400
In a grassland ecosystem, if the population of eagles suddenly decreased, what will most likely be the effect on the rest of the ecosystem?
A. The ecosystem will become overpopulated with snakes
B. There will be a decrease in the population of snakes in the ecosystem.
C. The nutrition of the soil in the ecosystem will decrease
What is A. The ecosystem will become overpopulated with snakes
500
What has the greatest effect on wind speed?
A. precipitation
B. cloud cover
C. wind direction
D. air pressure
What is D. air pressure
500
A pencil falls off a desk. What moves the pencil toward the floor?
A. mass
B. friction
C. gravity
D. speed
What is C. gravity
500
Which statement best describes a bacterial cell?
A. it contains more than one cell
B. it is a complete organism
C. it is part of a larger organism
D. it contains different kinds of cells
What is B. it is a complete organism
500
Which example best shows structures that make up the digestive system in the human body?
A. heart, blood, vessels
B. nose, trachea, lungs
C. brain, spinal cord, nerves
D. esophagus, stomach, intestines
What is D. esophagus, stomach, intestines
500
Which is an example of a decomposer?
A. a hawk
B. a mouse
C. a flower
D. a mushroom