Cells
Human Body
Ecosystems
Genetics
Food Chains & Webs
100
Which best describes all unicellular organisms?
A) Every cell is round.
B) Every cell can make food.
C) Every cell can move on its own.
D) Every cell performs all life functions.
D) Every cell performs all life functions.
100
Which two human body systems are most responsible for getting oxygen to cells?
A) digestive and skeletal
B) skeletal and circulatory
C) circulatory and respiratory
D) respiratory and digestive
C) circulatory and respiratory
100
The picture shows a polar bear.
Which change in the environment would most likely decrease the ability of this animal to survive?
A) increase in Earth’s temperature
B) decrease in Earth’s temperature
C) increase in yearly rainfall
D) decrease in yearly rainfall
A) increase in Earth’s temperature
100
Which human trait is most likely inherited from a parent?
A) learning to ride a bike
B) holding a spoon
C) reading a book
D) height
D) height
100
What would most likely happen to this food chain if a farmer decides to dust a wheat crop with an insecticide?
A) The wheat would become greener.
B) Other birds would move into the fields.
C) The hawks would start eating the wheat.
D) There would be fewer sparrows in the fields.
D) There would be fewer sparrows in the fields.
200
A single-cell organism can do everything a cell from a multicellular organism can do except
A) specialize.
B) reproduce.
C) use energy.
D) make protein.
A) specialize.
200
Bone cells need nutrients. Which two systems get nutrients to bone cells?
A) the digestive system and the circulatory system
B) the circulatory system and the respiratory system
C) the respiratory system and the skeletal system
D) the skeletal system and the digestive system
A) the digestive system and the circulatory system
200
In what way do bushes benefit from bears eating their berries?
A) Their seeds are spread around.
B) Other predators are scared away.
C) Nearby ground becomes compacted.
D) Their stems and branches are broken.
A) Their seeds are spread around.
200
Which characteristic of a kitten is an acquired trait due to environmental influences?
A) cleaning its ears
B) sleeping on a chair
C) sharpening its claws
D) meowing when it is hungry
C) sharpening its claws
200
Which two organisms in the food chain shown below are carnivorous?
A) grass and mice
B) mice and snakes
C) hawks and grass
D) snakes and hawks
D) snakes and hawks
300
How can a Paramecium carry out all of life’s functions?
A) by having specialized cells
B) by being larger that most organisms
C) by being smaller that most organisms
D) by performing all processes in one cell
D) by performing all processes in one cell
300
How are the skeletal and circulatory systems alike?
A) They help give the body shape.
B) They help the body make oxygen.
C) They help the body remove waste.
D) They help the body produce new blood.
D) They help the body produce new blood.
300
Which correctly compares lakes and ponds?
A) Ponds are usually larger and deeper than lakes.
B) Lakes are usually larger and deeper than ponds.
C) Ponds usually contain salt water, while lakes contain freshwater.
D) Lakes usually have the same temperature from top to bottom, while ponds do not.
B) Lakes are usually larger and deeper than ponds.
300
At a family reunion, Alice notices a common inherited characteristic among the people there. Which is most likely the trait that Alice notices?
A) Most people have brown hair.
B) Most people wear tennis shoes.
C) Most people live in the same state.
D) Most people speak the same language.
A) Most people have brown hair.
300
A rabbit depends on various plants in an ecosystem to survive. Which would most likely happen if a drought decreased the plant population?
A) The rabbit population would increase.
B) The rabbit population would decrease.
C) The rabbit population would remain the same.
D) The rabbit population would increase, then decrease quickly.
B) The rabbit population would decrease.
400
What is the difference between single-celled organisms’ and multicellular organisms’ ability to survive?
A) Multicellular organisms depend on other organisms for survival, while single-celled organisms do not.
B) Single-celled organisms depend on other organisms for survival, while multicellular organisms do not.
C) Single-celled organisms contain many specialized cells necessary for survival, while multicellular organisms do not.
D) Multicellular organisms contain many specialized cells necessary for survival, while single-celled organisms can survive alone.
D) Multicellular organisms contain many specialized cells necessary for survival, while single-celled organisms can survive alone.
400
How are the muscular and digestive systems similar?
A) Both help the body sleep.
B) Both help the body think.
C) Both help the body digest food.
D) Both help the body take in oxygen.
C) Both help the body digest food.
400
Which explains the difference between a pond and an estuary?
A) A pond is very shallow and an estuary is very deep.
B) A pond contains no plants and an estuary contains plants.
C) A pond is affected by tides and an estuary is not affected by tides.
D) A pond contains freshwater and an estuary contains fresh and salt water.
D) A pond contains freshwater and an estuary contains fresh and salt water.
400
Which of these is an inherited trait?
A) dimples
B) long hair
C) favorite color
D) driving ability
A) dimples
400
In what way do bushes benefit from bears eating their berries?
A) Their seeds are spread around.
B) Other predators are scared away.
C) Nearby ground becomes compacted.
D) Their stems and branches are broken.
A) Their seeds are spread around.
500
Which best explains why a human needs many cells to survive?
A) Each individual cell is too small to function alone.
B) Each cell joins with other cells to form one massive cell.
C) Each cell works with other cells to perform all necessary life functions.
D) Each cell absorbs a different gas from the environment necessary for human survival.
C) Each cell works with other cells to perform all necessary life functions.
500
Which body system sends electrical signals to all other body systems?
A) circulatory system
B) digestive system
C) muscular system
D) nervous system
D) nervous system
500
Which best describes a characteristic of both lakes and oceans?
A) Both ecosystems contain salt water.
B) Both ecosystems are affected by tides.
C) Sunlight does not reach the deeper areas of either ecosystem.
D) No organisms can survive in the deeper areas of either ecosystem.
C) Sunlight does not reach the deeper areas of either ecosystem.
500
All cheetahs in a population resemble each other. Which is a characteristic that results from environmental influence and differs among members of the population?
A) patterned fur
B) height and weight
C) long, muscular legs
D) yellow-colored eyes
B) height and weight
500
This is an aquatic food chain.
Which situation will most likely occur if the pond is polluted?
A) The tadpole population will decrease while the others will remain the same.
B) The algae population will decrease while the others will remain the same.
C) The algae, tadpole, and perch populations will decrease.
D) The algae, tadpole, and perch populations will increase.
C) The algae, tadpole, and perch populations will decrease.