matter and enrgy
force,motion,and energy
earth and space
organisms and environments
100
a roller coaster is an example of what kind of energy
mechanical energy
100
reflection does what
bounces of light waves off of a surface
100
renewable resources
air
plants
animals
water
100
decomposers
break down dead plants and animals
200
when you put water and oil in a cup why does the oil float to the top.
because it is less dense than water.
200
refraction is what
bending of light waves as they pass through on medium to another
200
alternative energy resources
solar
wind
geothermal
bio fuels
hydroelectric
200
food chains
sun
producer
herbivore
carnivore
300
what causes condensation,and what change does it have.
gas to liquid,and it is caused by cooling
300
what are the uses of energy
mechanical energy
electrical energy
light energy
thermal energy
sound energy
300
causes of wed
wind
water
waves
ice
300
photosynthesis
plants take in carbon dioxide,water,and sunlight,and release oxygen
400
mass is measured in what
grams
400
friction is what
a force that works against one another
400
lunar cycle takes how many days to form
29 days
400
inherited traits
passed on through genes from parent to child
500
what is the mass number of a potassium atom that has 20 neutrons.
39
500
b
500
how long does it take for tides to form
13 hours
500
carbon dioxide oxygen cycle
animals inhale oxygen,and exhale carbon dioxide during respiration.plants take in carbon dioxide and emit oxygen during photosynthesis