science is a way of learning more about the natural world
100
what is SI?
The SI is a system of standard measurement that is used worldwide
100
what is matter?
matter is anything that has mass and takes up space
100
what is element and what are the three kinds of elements
is matter made of only one kind of matter
metals, metalloids and nonmetals
100
what is the change from a gas to a liquid?
condensation
200
what is a scientific theory
a scientific theory is an attempt to explain a pattern seen repeatedly in the natural world
200
What are some of te units in the SI system?
meter (m) for length
kilogram (kg) for mass
kelvin (k) for temperature
second (s) for time
200
what isn't matter?
light has no mass and doesn't take up space
so as heat
your thoughts, feelings, and ideas are not matter, either
200
what does element in a group have in common
they have similar proprieties related to their structures
200
what is heat?
Movement of thermal energy from a substance at higher temperature to a substance at a lower temperature
300
scientific law is
a rule that describes a pattern in nature
300
what does a drawing show?
drawings are helpful because they can show details
300
how small is an atom
atoms are so small it could take about 1 million of them lined up in a row to be about as thick as one human hair
300
what is the atomic number of an element
is the number of protons in the nucleus of each atom of an element
300
what is the difference between temperature and thermal energy?
temperature is the average kinetic energy of all the particles of a substance and thermal energy is the total kinetic energy of all particles in a sample of matter
400
three branches of science
life science
earth science
physical science
400
what are the three kinds of graph
line graph
bar graph
circle graph
400
what is an electron
are invisible particles with negative charge
400
what is an isotope?
isotopes are atoms that have different numbers of neutrons
400
if you put to or more substances together but they don't combine to make a new one, what it is ?
it is a mixture
500
what is technology
is the practical use of science in our everyday lives
500
what is the difference between tables and graphs
a table lists information in columns and rows
a graph is a drawing that shows data, or information
500
what did niels bohr found?
he found that electrons are arranged in energy levels in an atom
500
what is an atom's mass number?
is the number of protons plus the number of neutrons in its nucleus
500
what kind of matter has a definite volume but doesn't have a definite shape?