Science Things
These three subatomic particles make up all atoms.
What are protons, neutrons, and electrons
These bonds form when atoms share electrons.
What are covalent bonds?
A pure substance made of only one type of atom.
What is an element?
Atoms that gain or lose electrons become these charged particles.
What are ions?
A proton has this type of electrical charge.
What is positive?
These bonds form when electrons are transferred from one atom to another.
What are ionic bonds?
A substance formed by combining two or more elements in definite proportions.
What is a chemical compound?
The study of living things is known as this branch of science.
What is biology?
This molecule carries the universal directions for inheritance.
What is DNA?
This compound is made from sodium and chlorine but is safe to eat.
What is sodium chloride (table salt)?
A signal to which an organism responds.
What is a stimulus?
The process by which organisms maintain stable internal conditions.
What is homeostasis?
Water’s chemical formula.
What is H₂O?
This part of the atom contains protons and neutrons.
What is the nucleus?
A personal point of view that is not scientific.
What is bias?
These negatively charged particles move constantly around the nucleus.
What are electrons?
A scientific explanation that can be tested by further observation or experimentation.
What is a hypothesis?
This number tells you how many protons an atom has.
What is the atomic number?
This variable responds to changes in the independent variable.
What is the dependent variable?
The combination of chemical reactions that build up or break down materials in organisms.
What is metabolism?
This group in an experiment is treated exactly the same except for the independent variable.
What is the control group?
The smallest unit of most compounds formed by covalent bonds.
What is a molecule?
Scientists submit their work to anonymous experts in their field for evaluation in this process.
What is peer review?
Over many generations, groups of organisms undergo change in this process.
What is evolution?
Atoms of the same element that differ in their number of neutrons.
What are isotopes?