Human body
what is the purpose of the muscular system?
the muscular system allows movement of bones and helps maintain posture
what determines the direction in which air masses flow across the united states .
A. the gulf of Mexico
B. the Atlantic ocean
C. the heat from the sun
D. the rotation of earth
C. the heat from the sun
which statement best describes producers?
A. producers in water ecosystems are mainly algae
B. producers in land ecosystems are mainly grasses
C. producers in both water and land ecosystems are mainly trees
D. producers in both water land ecosystems are mainly green plants
D. producers in both water and land ecosystems are mainly green plants
a toy car is rolling forward and bounces backward after it runs into a wall .why does this happen?
A. the car changed into reserse when it hit the wall
B. newton's 1st law
C. newton's 2nd law
D. newton's 3rd law
newton's 3rd law
which best word most likely result in change in the state of matter.
A. baking a cake
b. boiling water
C. lighting a match
D. rusting bike chain
B. boiling water
which body system works together to allow the body to move?
A. nervous & skeletal
B. muscular & skeletal
C. nervous & circulatory
D. muscular & circulatory
B. muscular & skeletal
which best describes how winds in the jet stream blow?
A. no pattern
B. Between two boundaries of hot air
C. Between two boundaries of cold air
D. Between a boundary of cold air and a boundary of hot air
D. Between a boundary of hot air & a cold air
which of the following would be an abiotic factor in an ecosystem?
A. trees
B. decomposers
C. parasites
D. water
D. water
a pencil falls off a desk .what moves the pencil towards the floor?
A. mass
B. friction
C. gravity
C. gravity
which is a good example of a chemical change?
A. kool-aid
B. baking a cake
C. cutting wood
B. baking a cake
which organism performs life processes in one cell?
A. grass
B. bacteria
C. butterfly
D. mushroom
B. bacteria
A Sciencetist is collecting data over time using a barometer that trends could best revealed from the data?
A. changes in cloud cover
B. changes in temperature
C. changes in air pressure levels
D. changes in precipitation levels
C. changes in air pressure levels
which animal could be classified as an omnivore?
A. wolf
B. rabbit
C. black bear
D. dragonfly
C. black bear
what can cause a moving object to increase its speed in a forward direction?
A. a force pushing on the object from the opposite direct on
B. a force that continually acts on the mass of the object
C. a decrease in the mass of the object
D. a increase in the mass of the object
b. a force that continually acts on the mass of the object
a jeweler melts gold make jewelry. as the gold melts, the mass.
A. increases
B. decreases
C. is destroyed
D. stays the same
D. stays the same
which two body systems work together to take oxygen and release carbon dioxide?
A. muscular & skeletal
B. digestive & circulatory
C. respiratory & muscular
D. circulatory & respiratory
D. circulatory & respiratory
what causes water to evaporate?
A. heat transfer
B. wind speed
C. temperature
A. heat transfer
which two organisms in food chain are carnivores?
A. grass & mice
B. mice & snakes
C. hawks & grass
D. snakes & hawks
D. snakes & hawks
which type of energy is the energy used by moving objects?
A. potential
B. electromagnetic
C. kinetic
D. solar
C. kinetic
which example best describes a physical change?
A. baking a pie
b. the rust on a nail
C. making a paper airplane
D. slime
C. making a paper airplane
why does the digestive system so important for the human body?
it breaks down food into nutrients into the blood.
which most likely result from a low pressure weather system?
A. landforms
B. wind speed
C. precipitation
D. temperature
A. landforms
which organisms directly use light energy from the sun to obtain food?
A. carnivores
B. producers
C. consumers
D. decomposers
C. consumers
the rate of change of velocity is called...
A. accelerationB. motion
C. momentumD. inertia
A. acceleration
how would you describe sand being made into glass?
A. radiation
B. physical change
C. conduction
D. chemical change
D. chemical change