QUESTIONS WITH SOLUTIONS GRADED A+
◉characteristics of living things. Answer: organized, need nutrients
and energy, respond to stimuli, reproduce and develop, adapt
◉Scientific process. Answer: observation, hypothesis,
experiment/further observation, data, conclusion
◉homeostasis. Answer: internal balance, process by which
organisms maintain a relatively stable internal environment
◉element. Answer: 92 natural occurring, Carbon hydrogen,
nitrogen, oxygen, phosphorus, sulfur
◉CHNOPS. Answer: Carbon, Hydrogen, Nitrogen, Oxygen,
Phosphorus, Sulfur
◉atom. Answer: smallest particle of elements
◉atomic number. Answer: number of neutrons in the atom
, ◉atomic mass. Answer: neutrons + protons
◉periodic table. Answer: vertical- groups, chemically similar
horizontal- periods, larger and larger
◉isotopes. Answer: atoms of the same element that have different
numbers of neutrons
◉electron shells. Answer: different energy levels referred to as
electron shells
◉oclet rule. Answer: inner shell has 2 orbitals, others have 8, or
multiples of 8
◉if 3 or less. Answer: tends to donate
◉if 5 or more. Answer: tends to recieve
◉molecule. Answer: two or more atoms bonded together
◉compound. Answer: group of atoms where at least one is different