I Love Science!
Jason fills a glass container completely with water and screws the lid on tightly. He places the container in a freezer. Which will most likely result?
A The container will prevent the water from freezing.
B The water will freeze and take up less space in the container.
C The water in the container will expand when it freezes and cause the container to crack.
D The container will absorb heat from the water, causing it to crack.
C The water in the container will expand when it freezes and cause the container to crack.
In North Carolina, the wind is blowing from the north. If the wind changes direction and begins to blow from the south, what will most likely result?
A The temperatures will increase.
B The temperatures will decrease.
C The air pressure will increase.
D The wind speeds will decrease.
A The temperatures will increase.
Which is a characteristic of most single-celled organisms?
A They have a complex nervous system.
B They contain several different types of cells.
C They perform all life processes.
D They have a circulatory and a respiratory system.
C They perform all life processes.
Which is an example of a trait that is inherited?
A dimples
B intelligence
C weight
D favorite color
A dimples
Which is the best example of a new substance forming?
A lighting a match
B cutting a piece of paper
C popping a balloon
D hitting a nail with a hammer
A lighting a match
Which would most likely cause a decrease in a population of herbivores?
A an increase in the number of producers
B a decrease in the types of decomposers
C an increase in the types of plants
D an increase in the number of carnivores
D an increase in the number of carnivores
In what way are the digestive and circulatory systems alike?
A Both protect organs in the body.
B Both control movement of the body.
C Both absorb gases or nutrients into the body.
D Both provide structural support for the body.
C Both absorb gases or nutrients into the body.
Which has the greatest effect on the amount of salt in a salt marsh?
A the number of animals living in the marsh
B the closeness of the marsh to the ocean
C the depth of the water in the marsh
D the temperature of the water in the marsh
B the closeness of the marsh to the ocean
If a car is moving backward along a road, can its speed be measured?
A Yes, it can, because the car does not have friction acting on it.
B Yes, it can, because the car travels a distance in a certain amount of time.
C No, it cannot, because speed can only be measured if the car is moving forward.
D No, it cannot, because the distance traveled backward by a car cannot be measured.
B Yes, it can, because the car travels a distance in a certain amount of time.
Which best describes the cause of day-to-day weather changes?
A the rotation of Earth
B the size of Earth
C moving air masses
D action of the winds
C moving air masses
How does the energy from the sun influence the water cycle?
A by trapping water particles in clouds
B by turning liquid water into water vapor
C by causing water to precipitate
D by creating winds in the atmosphere
B by turning liquid water into water vapor
In what way are the circulatory system and the nervous system similar?
A They both perform the same function.
B They are both structural systems.
C They are both transport systems.
D They both involve the same organs.
C They are both transport systems.
What will be most affected if the decomposers in an ecosystem are removed?
A the spread of disease
B the availability of water
C the quality of soil
D the distribution of organisms
C the quality of soil
Stirring a cup of hot tea causes a metal spoon to get warm. Which statement best explains why the spoon gets warm?
A Heat energy transfers from the metal spoon to the hot liquid.
B Heat energy transfers from the hot tea to the spoon.
C Heat energy transfers from the air to the hot liquid, and then to the spoon.
D Heat energy transfers from the hot liquid to the cup, and then to the spoon.
B Heat energy transfers from the hot tea to the spoon.
Which statement best explains how a bacterial cell is capable of surviving as a single-celled organism?
A It is able to create new cells more slowly than other kinds of cells.
B It is large enough to capture the food it needs for growth.
C It is so small, it can survive in almost any place.
D It has the ability to carry out all of its life functions.
D It has the ability to carry out all of its life functions.
A bowling ball moves across a flat surface at 7 feet per second. If a student is asked to calculate the total distance traveled by the ball, what other information does the student need to know?
A amount of friction between the ball and the surface
B amount of force applied to the ball
C total time the ball rolled
D mass of the ball
C total time the ball rolled
This is a food chain that includes grass, a grasshopper, and a bird.
grass → grasshopper → bird
How is the grass in this food chain best described?
A It is a producer, because it makes its own food.
B It is a producer, because it is eaten by consumers.
C It is a consumer, because it gets energy from producers.
D It is a decomposer, because it breaks down sunlight.
A It is a producer, because it makes its own food.
One morning, a student notices that the grass in the area is wet, although it had not rained during the night. What could have caused the grass to be wet?
A During the night, water had evaporated from the trees in the area.
B The air above the ground became warmer during the night and caused precipitation.
C When the air cooled above ground during the night, water vapor condensed on the grass.
D The grass soaked up water from the ground during the night.
C When the air cooled above ground during the night, water vapor condensed on the grass.
After lake water flows through a dam, which processes are most responsible for helping replace the water in the lake?
A precipitation and runoff
B transpiration and condensation
C condensation and runoff
D transpiration and precipitation
A precipitation and runoff
Some people have a “hitchhiker’s” thumb that allows them to bend their thumbs more than other people. How do these people most likely get this trait?
A They learn it from friends.
B They inherit it from their parents.
C They get it as a result of an illness.
D They get it as a result of their jobs.
B They inherit it from their parents.
What would most likely happen if all of the decomposers in an ecosystem were removed?
A The animals in the ecosystem would die because of the spread of disease.
B The plants in the ecosystem would eventually die because of a lack of nutrients in the soil.
C The plants in the ecosystem would begin to die out because of a decrease in available water.
D The animals in the ecosystem would eat other types of food because of a decrease in producers.
B The plants in the ecosystem would eventually die because of a lack of nutrients in the soil.
Which best describes how the Gulf Stream affects the areas along the coast of North Carolina?
A It causes winds to move from north to south during the winter.
B It causes winds to move from north to south during the summer.
C It causes land temperatures along the coast to be colder in the winter.
D It causes land temperatures along the coast to be milder in the winter.
D It causes land temperatures along the coast to be milder in the winter.
What would most likely result if all plants in an area were destroyed?
A Consumer populations would increase because more sunlight would reach the ground.
B Decomposer populations would increase because more sunlight would reach the ground.
C Consumer populations would decrease because plants provide them with water.
D Consumer populations would decrease because plants provide them with energy.
D Consumer populations would decrease because plants provide them with energy.
A food chain in an ecosystem includes blackberry bushes, deer, and wolves.
• Deer eat blackberries.
• Wolves eat deer.
If the population of wolves decreases, how will this affect the population of blackberry bushes?
A It will decrease because there will be fewer deer.
B It will increase because there will be fewer deer.
C It will decrease because there will be more deer.
D It will increase because there will be more deer.
C It will decrease because there will be more deer.
Which is an example of a noninherited trait?
A shape of face
B hair color
C food preference
D tongue rolling
C food preference