matter
what is matter made out of
what are five main systems in the body system
digestive, skeletal, nervous, respatory, circulatory
what is a force
a push or a pull
does the water cycle ever stop
no!
what are the two types of energy
kinetic and potential
what are the three types of matter
solids, liquids, and gas
what are three major organs
brain, heart, lungs
how do you open a heavy door
pull
can water evaporate when it is frozen
yes
what energy is stored
potential
what kind of atoms are in a solid
tightly packed
what is the most important system
nervous system
what are the three types of structures
solid, shell, frame
what are the three types of precipitation
liquid, solid, and freezing
what is stored energy
kinetic
what kind of atoms are in a liquid
spread apart
what system is it called with bones
skeletal system
can you see a force
no!
what is evaporation
liquid to gas
name three types of fossil fuels
coal, oil, natural gas
what kind of atoms are in a gas
really fast and spread apart
what do your intestines do
digest, nutrient absorption, waste management, and immune defense
why do objects fall instead of floating away
because of gravity
what is sleet
hail
what type of energy is used the most
dark energy