Biology 109 Exam#1 Questions and Answers 100% Pass

Biology 109 Exam#1 Questions and Answers 100% Pass What are the characteristics of life? - All lfe is organized All life grows and develops All life reproduces All life responds to stimuli All life processes energy All life adapts All life is homeostatic List the steps to the scientific method. - make an observation, comeup with a question, form a hypothesis, collect and analyze data, conclusion. What is atomic mass? - number of protons and number of neutrons What is the atomic number? - the number of protons and electrons What is an ion? - an element or compound with an electrical charge 2© EMILY CHARLENE YEAR , ALL RIGHTS RESERVED What are the types of ions? What is their charge? - Cation: positive ion resulting from the loss of electrons Anion: negative ion resulting from a gaining of electrons What is an isotope? - an element with a charge in the number of neutrons What are the types of chemical bonds? - Ionic Bond: the bonding of opposite ions. Covalent Bond: a bond resulting from the sharing of electrons. Hydrogen Bond: the bonding of hydrogen to another element. List the types of particles and their charge. - Protons: (+) charge; 1 amu Electrons: (-) charge; 0 amu Neutrons: zero charge; 1 amu List the properties of water. - Water is sticky, Universal solvent, Ice is less dense than liquid water, Water can fliter UV radiation, Water remains a liquid over a wide temperature range, Moderate pH. List the difference between cohesion and adhesion. - Cohesion: water molecules bonding to each other Adhesion: water molecules bonding to other polar molecules The difference in pH units between 2 acidic solutions is 3. How much more acidic is the stronger acid than the weaker acid? - 1000 more acidic 3© EMILY CHARLENE YEAR , ALL RIGHTS RESERVED The 2+ in Cu2+ tells us that this atom is what? - has two more protons than electrons An atom of carbon has an atomic number of 6 and an atomic weight of 12. How many neutrons are in a typical carbon atom? - 12 - 6 = 6 neutrons In chemical bonding, when bonded atoms share electrons is called? - Covalent bond How are charges distributed on water molecules? - the oxygen end is negative relative to the end with 2 hydrogen atoms. Water strides are common insects that can skip across the surface of ponds and streams. This lifestyle is possible by water's what? - cohesion and re