Chemistry of life

Question 1

Atomic #

Answer 1

of protons in nucleus of an atom

Question 2

Atomic Mass

Answer 2

of protons + # of neutrons in nucleus of atom

Question 3

Periodic table

Answer 3

Table that shows the arrangements of elements

Question 4

Chemical Formula

Answer 4

A set of chemical symbols showing the elements present in a compound and their relative proportions

Question 5

Molecule

Answer 5

Two or more atoms bonded together

Question 6

Compound

Answer 6

Molecule of 2 or more elements bonded together

Question 7

Mixture

Answer 7

To or more substances NOT chemically bonded

Question 8

Organic Molecule

Answer 8

Consists of carbon atoms in rings or long chains where other atoms (e.g hydrogen oxygen and nitrogen are attached.)

Question 9

Macromolecule

Answer 9

Large biological molecules made up of smaller molecules and found in living organisms: proteins, lipids, carbohydrates, and nucleic acids.

Question 10

Universal solvent

Answer 10

Water; can dissolve most things

Question 11

Surface tension

Answer 11

The tension of the surface film pf a liquid caused by the attraction of particles in the surface layer.

Question 12

Organism

Answer 12

possesses the characteristics of life; a living thing

Question 13

Characteristics of life

Answer 13

• Living things are made up of at least one cell
• Living things have a “genetic code” called DNA
• Living things obtain and use materials for energy
• Living things grow and develop (get larger &change over time).
• Living things reproduce; asexually or sexually
• Living things respond to the environment
  -Living things maintain homeostasis =(stablei9nternal environment.)
• Living things (as a group) evolve= (change DNA over time).

Question 14

Cell

Answer 14

Smallest unit of life. Ex. 1 single cell (bacteria, nerve cell.)

Question 15

Organelle

Answer 15

Cell structure or part that preforms a specific function Ex. Nucleus

Question 16

Tissue

Answer 16

A group of similar cells working together to perform a function Ex. muscle mass

Question 17

Organ

Answer 17

A group of more than one tissue that works together to perform a specific function. Ex heart, lungs, brain, stomach)

Question 18

Organ systenm

Answer 18

Group of organs that work together to perform a specific function. Ex. digestive system. (stomach intestines etc.)

Question 19

Homeostasis

Answer 19

Internal state of balance

Question 20

Metabolism

Answer 20

All of the chemical reactions and processes within an organism in order to maintain life.

Question 21

Matter

Answer 21

Anything that has mass and takes up space

Question 22

Atom

Answer 22

Smallest unit/building block of matter

Question 23

Nucleus

Answer 23

center of a atom contains protons and neutrons

Question 24

proton

Answer 24

positively charged of an atom found in the nucleus

Question 25

Neutron

Answer 25

Neutrally charged particle of an atom found in the nucleus.

Question 26

Electron

Answer 26

Negatively charged particle of an atom found in the nucleus.

Question 27

Element

Answer 27

Purest from of a substance

Question 28

Organization of life

Answer 28

atom, molecule, organelle, cell tissue, organ, organ system, organism.