Earth Science
the number of protons in the nucleus of an atom
What is the atomic number?
matter that is shapeless and expands to fill any closed container it is placed in.
What is a gas
two or more substances together that can be easily separated
What is a mixture
xylem and phloem tubes in a vascular plant are this
What is a vascular tissue
a measure of the force of gravity on an object
What is weight
the layer of the Earth's atmosphere that is the coldest
What is the Mesosphere
A substance made of two or more different kinds of atoms.
What is a compound?
the process by which energy for life is released from food in cells
What is cellular respiration