Katelyns biology test
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Katelyns biology test
whats the difference between an ion and a compound?
an ion is a type of atom and loses/gains electrons. With a compound, it uses atoms and bonds them together; it doesnt lose any
whats the difference between an atom and an element?
an atom is the simplest unit of matter, and an element is made up of an atom.
_ bonds give/receives electrons (ions)
_ bonds are weaker than the others
_ bonds hold sodium chloride together
_ and _ bonds both attract positive and negative
ionic and hydrogen
_ forces cause Ionic and Hydrogen bonds to bond
Ionic bonds, Hydrogen bonds, and covalent bonds form _
Hydrogen bonds form between _
attraction between slightly positive hydrogen ion and slightly negative hydrogen ion
_forms when atoms share electrons
_ forms through the electrical force between oppositely charged ions
how is cellular respiration like exothermic?
it breaks down food to release energy
whats an example of exothermic?
animals that light up.
heat or light
_ releases more energy than taken in
enzymes are made up of _
activation energy is lowered by a _
_ is the amount of energy to start a chemical reaction
what does the arrow of the chemical reaction mean?
the arrow in the chemical reaction tells the _ of the reaction
where does a hydrogen bond occur?
_ are electrons that are equally shared so they have no charges
_ is always the greater amount
an _ brings things close so they can react.
_ bonds are strong due to sharing.
_ bonds are weak due to attraction between charges
atoms share pairs of electrons in _ bonds
positive and negative attract, which causes _
an ionic bond
Long chains of amino acids are found in _
DNA and RNA are two types of _
Fats, oils, and cholesterol are all types of _
the attraction among molecules of different substances is called _
the four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, and _.
acidic solutions that have a ph are: a) less than 7, b) more than 7, c)a negative number, d)between 7 and 14
a) less than 7
attractions between water molecules are called _.
atoms r not composed of: a)protons b)neutrons c)covalent d)chemicals
The smallest unit of matter is the _