what does the atomic number indicate on a periodic table symbol?
how many protons the element has in a single atom
what is the dense core inside an atom?
the nucleus
what type of atoms have equal protons, neutrons, and electrons
uncharged atoms
like charges repel, and…
opposites attract
first orbital, second orbital refer to
the electrons orbiting the atom
independent variables can be
manipulated or changed
dependent variables can…
only be measured and observed (time)
viruses can reproduce outside of a host organism, true or false?
false
endothermic reaction
when the chemical reaction causes heat to lower
exothermic reaction
when a chemical reaction produces heat
primary consumer refers to
the first animal that consumes plants or trees or leaves
secondary consumer refers to
the animal that consumes the primary consumer
how high a wavelength reaches is called
amplitude
frequency or Hertz is
the number of oscillations completed per second
examples of transverse waves
light and radio waves
examples of longitudinal waves
some seismic waves and sound waves
how does photosynthesis happen in plants
plants get energy from sunlight, water from soil, and CO2 from external factors to create glucose and oxygen
what are reactants in photosynthesis
CO2 and water are reactants
glucose and oxygen are…
PRODUCTS
what are the laws of conservational matter
matter can neither be created or destroyed, but can change forms
what must products contain to be classified as products
the same amount and type of elements as they were as reactants
products must be balanced the same as
reactants
cell>tissue>organs>____>body
systems
chromosomes contain
DNA
