Intro to Chemistry

Question 1

What are life’s levels of organization?

Answer 1

Cells, Population, Communities, Ecosystems, Biosphere

Question 2

Cells

Answer 2

the basic unit of life

Question 3

Population

Answer 3

One type

Question 4

Communities

Answer 4

All organisims

Question 5

Ecosystems

Answer 5

Plus, abiotic factors(non-living)

Question 6

Biosphere

Answer 6

All types

Question 7

All things are made up of the same. units of matter

Answer 7

Atoms and Molecules

Question 8

Living things are made up of a certain subset of molecules

Answer 8

Nucleic acids, Proteins, Carbohydrates, Lipids

Question 9

The signature molecule of life

Answer 9

DNA

Question 10

DNA is the

Answer 10

Molecules of inheritance

Question 11

DNA directs the assembly of…

Answer 11

Amino acids(Proteins)

Question 12

Acquiring traits by the transition of DNA from parent to offspring

Answer 12

Inheritance

Question 13

Mechanisms by which an organism produces offspring

Answer 13

Reproduction

Question 14

Instructions for each stage in DNA…

Answer 14

Development

Question 15

Capacity to do work

Answer 15

Energy

Question 16

Reactions by which cells acquire and use energy to grow, survive, and reproduce

Answer 16

Metabolism

Question 17

…Sence changes in their environment and makes responses to them

Answer 17

Organisms

Question 18

…Detect specific forms of energy

Answer 18

Receptors

Question 19

The form of energy detected by a receptor is a…

Answer 19

Stimulus

Question 20

Maintenance of internal environment within the range suitable for cell activities

Answer 20

Homeostasis

Question 21

Living things evolve over time

Answer 21

Evolutionary Adaptation

Question 22

Traits that help an organism survive

Answer 22

Adaptations

Question 23

Organisms that have more favorable traits survive and pass the traits on to their offspring

Answer 23

Natural Selection

Question 24

Basic unit of matter

Answer 24

Atoms

Question 25

An atom is made up of

Answer 25

Protons, Neutrons, and Electrons

Question 26

Most common elements in the human body

Answer 26

Oxygen, Carbon, Hydrogen, Nitrogen

Question 27

Identifies the atom=to the number of protons

Answer 27

Atomic Number

Question 28

Number of protons and Neutrons

Answer 28

Atomic Mass

Question 29

Atoms of an element with different numbers of neutrons

Answer 29

Isotope

Question 30

It has an unstable nucleus, Gives off energy and particles, and Decays into another element

Answer 30

Radioisotopes

Question 31

Two or more elements chemically combined in definite proportions

Answer 31

Compounds

Question 32

The number and arrangement of their electrons

Answer 32

A reason for atoms to bond

Question 33

Vacancies in the outer shell

Answer 33

Hydrogen, Carbon, Oxygen, and Nitrogen

Question 34

It makes atoms more likely to bond

Answer 34

Unfilled Shells

Question 35

One or more electrons are transferred from one atom to another

Answer 35

Ionic Bond

Question 36

Atoms that have gained or lost electrons are called...

Answer 36

Ions

Question 37

Atoms that gain electrons become...

Answer 37

Negative ions

Question 38

Atoms that lose electrons become...

Answer 38

Positive ions

Question 39

The attraction between a posiitive and negative ion is an

Answer 39

Ionic Bond

Question 40

Electrons are shared between atoms

Answer 40

Covalent Bonds

Question 41

Covalent bonds form

Answer 41

Molecules

Question 42

Electrons are the same size and are shared equally, and Both atoms have a similar number of protons.

Answer 42

Nonpolar covalent Bonds Think "Scale"

Question 43

Electrons are not shared equally. Bigger size on one side, one atom has more protons than the other, and Electrons spend more time near the nucleus with the most protons.

Answer 43

Polar Covalent Bond "Tug o' War"

Question 44

One end of the molecule becomes slightly positive, and the other becomes slightly negative

Answer 44

Polar Molecules

Question 45

The more positive end of one polar molecule is attracted to the more negative end of another polar molecule

Answer 45

Hydrogen Bonds

Question 46

Hydrogen bonds are

Answer 46

Between molecules and electrons are not shared.

Question 47

Called hydrogen bond because...

Answer 47

Hydrogen is often the more positive end.

Question 48

The chemical formula for water is

Answer 48

H20

Question 49

A water molecule is...

Answer 49

Polar-Covalent because the electrons are not equally shared.

Question 50

The oxygen atom has a...charge and the hydrogen atom has a...charge

Answer 50

Negative, Positive

Question 51

Electrons in H2O are more attracted to the

Answer 51

Oxygen Atom

Question 52

H2O forms...when the oppositely charged ends are attached

Answer 52

Hydrogen Bonds

Question 53

Water is important because

Answer 53

Water is liquid at most temperatures found on earth

Question 54

Water is the

Answer 54

Universal Solvent because many substances dissolve in water

Question 55

Moderate temperature change

Answer 55

High specific heat

Question 56

Water when frozen

Answer 56

Floats to the top

Question 57

An attraction between molecules of the same substance creates surface tension

Answer 57

Cohesion

Question 58

An attraction between molecules of different substances

Answer 58

Adhesion