Atoms & Elements
What is the smallest unit of an element that retains its properties?
Atom
What is the chemical formula for water?
H2O
Approximately what percentage of a plant's mass is water, according to the presentation?
70-80%
Which macromolecule includes sugars and starches?
Carbohydrates
What element has the symbol C?
Carbon
Which subatomic particle has a negative charge?
Electron
What type of bond forms when atoms share electrons?
Covalent Bonds
What property of water helps it dissolve many compounds?
Universal Solvent
What are the building blocks of proteins?
Amino Acids
What element has the symbol O?
Oxygen
Which two subatomic particles are found in the nucleus?
Protons & Neutrons
What type of bond forms when electrons are transferred between atoms?
Ionic Bonds
What is the attraction between molecules of the same substance called?
Cohesion
Which macromolecule includes fats, oils, and waxes?
Lipids
What element has the symbol Ca?
Calcium
What is the difference between an element and a compound?
An element contains one kind of atom; a compound contains two or more kinds of atoms chemically combined.
What type of bond attracts neighboring water molecules to one another?
Hydrogen Bond
What is the attraction between molecules of different substances called?
Adhesion
Which macromolecules include DNA and RNA?
Nucleic Acids
What element has the symbol Fe?
Iron
What are the charges of a proton, neutron, and electron, in that order?
Proton, Neutral, & Negative
How many hydrogen atoms and oxygen atoms are in one water molecule?
What is the process that helps water move upward through narrow spaces, such as plant tissues?
Capillary Action
What do enzymes do to chemical reactions?
Speed Up Chemical Reactions
What are the element names for K, Na, and Cl?
Potassium, Sodium, Chlorine