Chapter 1&2

Question 1

Aqueous Solution

Answer 1

A solution in which water is the solvent

Question 2

Atom

Answer 2

The smallest unit of matter that retains the properties of an element

Question 3

Atomic Number

Answer 3

The number of protons in each atom of a specific element.

Question 4

Acid

Answer 4

A substance that increases the hydrogen ion concentration in a solution

Question 5

Base

Answer 5

A substance that decreases the hydrogen ion concentration in a solution.

Question 6

Buffer

Answer 6

A chemical substance that resists changes in the ph by accepting hydrogen ions from or donating hydrogen ions to a solution

Question 7

Chemical bonds

Answer 7

An attraction between two atoms resulting from sharing of outer shell electrons or the presence of opposite charges on the atoms the bonded atoms gain complete outer electron shells

Question 8

Chemical reactions

Answer 8

A process leading to chemical changes in matter involving the making and or breaking of chemical bonds

Question 9

Cohesion

Answer 9

The attraction between molecules of the same kind

Question 10

Compounds

Answer 10

A substance containing two or more elements in a fixed ratio

Question 11

Biology

Answer 11

The scientific study of life

Question 12

Biosphere

Answer 12

The global ecosystem the, entire portion of Earth inhabited by life all of life and where it lives

Question 13

Controlled experiment

Answer 13

A component of the process of science whereby a scientist carries out to parallel tests and experimental test and a control test that experimental test differs from the control by one factor the variable

Question 14

Discovery science

Answer 14

The process of scientific inquiry that focuses on describing nature

Question 15

Covalent bond

Answer 15

In attraction between Adams that share one or more pairs of outer shell electrons

Question 16

Electron

Answer 16

A subatomic particle with a single unit of negative electrical charge one or more electrons move around the nucleus of the Adam

Question 17

Element

Answer 17

A substance that cannot be broken down into other substances by chemical means

Question 18

Evaporative cooling

Answer 18

A property of water whereby a body becomes cooler as water evaporates from it

Question 19

Heat

Answer 19

The amount of kinetic energy contained in the movements of the Adams in molecules in the body of matter heat is energy in it’s most random phone

Question 20

Hydrogen bond

Answer 20

A type of weak chemical bond formed when a partially positive hydrogen Adam from one polar molecule is attracted to the partly negative Adam in another molecule

Question 21

Ions

Answer 21

And Atom or molecule that has gained or lost one or more electrons thus acquiring an electrical charge

Question 22

Ionic bond

Answer 22

And attraction between two ions with opposite electrical charges the electrical attraction of the opposite charge holds the ions together

Question 23

Isotopes

Answer 23

A variance form of an atom isotopes of an element have the same number of protons and electrons but different numbers of neutrons

Question 24

Mass

Answer 24

A measure of the amount of material in an object

Question 25

Eukaryotic cell

Answer 25

A type of cell that has a membrane enclosed nucleus and other membrane enclosed organelles all organisms except bacteria and archaea I composed of eukaryotic cells

Question 26

Ecosystem

Answer 26

All the organisms in a given area along with the nonliving factors with which they interact a biological community and its physical environment

Question 27

Gene

Answer 27

A unit of inheritance in DNA

Question 28

Hypothesis

Answer 28

A tentative explanation that a scientist proposes for a specific phenomenon that has been observed

Question 29

Mass number

Answer 29

The sum of the number of protons and neutrons in an atoms nucleus

Question 30

Matter

Answer 30

Anything that occupies space and has mass

Question 31

Molecule

Answer 31

A group of two or more atoms held together by covalent bonds

Question 32

Neutron

Answer 32

An electrically neutral particle

Question 33

Nucleus

Answer 33

An atoms central core containing protons and neutrons

Question 34

PH scale

Answer 34

A measure of the relative acidity of a solution ranging in value from zero most acidic to 14 most basic

Question 35

Polar molecule

Answer 35

A molecule containing polar covalent bonds have an opposite charges on opposite ends

Question 36

Products

Answer 36

An ending material in a chemical reaction

Question 37

Proton

Answer 37

A sub atomic particle with a single unit of positive electrical charge found in the nucleus of an Adam

Question 38

Radioactive isotope

Answer 38

An isotope is nucleus decay spontaneously giving off particles and energy

Question 39

Hypothesis driven

Answer 39

The process of scientific inquiry that uses the steps of the scientific method to answer questions about nature

Question 40

Life

Answer 40

The set of common characteristics that distinguish living organisms

Question 41

Natural selection

Answer 41

A process in which organisms with certain inherited characteristics are more likely to survive and reproduce than other organisms with other characteristics

Question 42

Prokaryotic cell

Answer 42

A type of cell lacking a nucleus and other organelles found only in the domains bacteria and archaea

Question 43

Reactants

Answer 43

A starting material in a chemical reaction

Question 44

Solute

Answer 44

A substance that is disc dissolved in a solution

Question 45

Solution

Answer 45

A liquid consisting of a homogeneous of two or more substances a dissolving agent the solvent and a substance that is dissolved this all you

Question 46

Solvent

Answer 46

Did you dissolving agent in a solution water is the most versatile known solvent

Question 47

Temperature

Answer 47

A measure of the intensity of heat reflecting the average kinetic energy or speed of molecules

Question 48

Trace elements

Answer 48

An element that is essential for the survival of an organism but is needed only in minute quantities

Question 49

Scientific method

Answer 49

Scientific investigation involving the observation of phenomena.

Question 50

Theory

Answer 50

A widely excepted explanatory idea that is brought it in scope and supported by a large body of evidence