Ecosystems
means nonliving
abiotic
Which body system works closely with the digestive system to move nutrients throughout the body?
circulatory system
a straight horizontal line on a distance time graph represents what?
the object is not moving
What is a wind vane used for?
to measure the direction the wind is blowing from
A child is playing with a toy truck with a mass of 250 grams. While playing, the toy truck hits a wall and loses a 10-gram wheel.
What is the mass of the broken truck?
240 grams
Which ecosystem has a mixture of fresh water and salt water and a large amount of living things?
estuary
Is a paramecium a single cellular or multicellular organism?
single
A ball is kicked and rolls along a level field until it comes to a stop. What is most responsible for the ball coming to a stop?
friction
A student observes white puffy clouds that appear to be floating cotton balls. Which type of clouds is the student observing, and which type of weather can the clouds bring?
cumulus clouds; fair weather
A bowl of ice cubes is taken out of a freezer and placed on a table. After 20 minutes, the ice melts into liquid water.
Why does the ice melt?
heat is transferred from the table to the ice cubes
A mouse eats seeds and insects. Which best describes the role of the mouse?
consumer
a broken leg is a ______________ trait
acquired
what is the equation for speed?
Speed = distance ÷ time
Which instrument is best used to predict weather changes?
barometer
A person makes oven mitts to use when removing hot pans from an oven. Which type of material should the person use for the oven mitts to provide protection from the hot pans?
a material that will not allow much heat to pass from the hot pans to the person’s hands
What would most likely cause a decrease in a population of herbivores?
an increase in the number of carnivores
Which system in the human body includes the lungs, trachea, and mouth?
respiratory
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?
the time it took to move that distance
What is the jet stream?
a band of air that moves across the United States
A person cooks a hot dog on a stick by holding it near a campfire. What type of heat transfer is that?
radiation
What would most likely result if all plants in an area were destroyed?
Consumer populations would decrease because plants provide them with energy.
Which human body systems are located throughout most of the body?
nervous and circulatory
skeletal and muscular
What causes a wagon to speed up when going down a hill?
gravity
How does the Gulf Stream affect North Carolina?
It causes land temperatures along the coast to be milder in the winter.
baking a cake is what type of change?
chemical change