Units of Life Flashcards
(23 cards)
The smallest basic unit of matter is the
Atom
Which of the following is formed when an atom gains or loses electrons
Ion
Atoms in molecules share pairs of electrons when they make
Covalent Bonds
What gives water many properties that are important to living things
Hydrogen bonds
Which of the following solutions has the highest H ion concentration
A solution with a PH of 1
What is unique about carbon
Bonding properties
The four main types of carbon based molecules in organisms are carbohydrates, lipids, Nucleic acids, and
Proteins
Both animal fats and plant oils are made up of glycerol And
Fatty acids
Chemical reactions that absorb more energy than they release are called
Endothermic
Substances are changed into different substances when bonds break and form during
Chemical reactions
The activation energy needed for a chemical reaction is decreases by a
Catalyst
Which phrase best describes an atom
Smallest basic unit of matter
Which aspect of a chemical reaction is affected by enzymes
Rate
How do ions form
Atoms gain or lose electrons
How are atoms held together in molecules
They forms covalent bonds
How does the addition of an acid affect a neutral solution
The H ion concentration is increased
Chemical reactions change substances into different substances by
Breaking and forming bonds
What is the term for the substances that are changed during a chemical reaction
Reactants
Microscopes led to the discovery that all organisms are
Made of cells
Together, all of the chemical processes that build up and break down materials in organisms called
Metabolism
The substance that covers the majority if earth surface and also makes up the largest percentage of your cells is
Water
What is the name of the negatively charged particles
Electtons
Through photosynthesis, plants convert energy from sunlight into
Chemical energy
