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4th Grade Science ALL units review
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heat moves from ___ to ___
hot to cold
convection happens mainly in ____ and _____
liquids and gases
____ is the heat movement that happens mostly in solids
conduction
what are the two ways water is heated into steam to power generators in a power plant
sunlight and burning coal
rubber is a good ____ of electricity conductor or insulator
insulator
what is friction
the force between two objects rubbing against each other
what type of simple machine is a flag pole
pulley
____ is the force causing a needle in a compass to point north
magnetism
a car traveling east at 75 MPH is an example of speed or velocity
velocity
a car turning left is an example of velocity or acceleration
acceleration
two dogs pulling on a rope and one tugs the toy out of the other's mouth is balanced or unbalanced forces
unbalanced
what is the reference point
the place or object another object moves to
what is force
a push or pull
____means to circle
revolve
how does the moon shine at night
reflects the sun's light
what is an orbit
path an object takes in space
what is the predictable rise and fall of ocean water called
tide
what do we call a system of millions and billions of stars
galaxy
what is the order that deposition, erosion and weathering happen in?
weathering, erosion, deposition
are minerals alive or were once alive
yes
what type of rock is made from magma and lava
igneous
a ____ is an old volcano with a flat top (guyot or volcanic island)
guyot
which process is the sun important for in the water cycle?
evaporation
what do we call a slow moving river of ice
glacier
which type of cloud is puffy like a cotton ball? cumulus or stratus
cummulus
why do seasons change
earth is tilted on its axis
what is a habitat
a place an organism lives in the ecosystem
how does camoflauge help a predator to get food
sneak up
what does extinct mean
organism that used to live but the population has completely diedout
driving a car that emits less smoke is an example of conserving water land or air
air
a ____ is a skeleton on the inside of the body
endoskeleton
what is an exsoskeleton?
a skeleton outside the body
true or false: mollusks have soft bodies
TRUE
tell me two facts about insects
varies
what is an omnivore
eats meats and veggies
what do we call an animal that eats meat
carnivore
what is a learned behavior?
a behavior an animal does not learn by instinct
which kingdom makes its own food (plants, fungi, animals)
plants
what is a prediction
a guess based on an observation
what do we call making a seed or offspring (pollinate or reproduce)
reproduce
what part of the flower is pollen found
stamen


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