Finals / NeSA

Question 1

Hypothesis

Answer 1

The proposed scientific explanation for a set of observations

Question 2

Theory

Answer 2

Ideas that have been supported over time

Question 3

Control Group

Answer 3

A group of subjects closely resembling the experimental group, but does not receive the factor under study. (used as comparison)

Question 4

Experimental Group

Answer 4

A group of subjects which receive the factor under study

Question 5

Stimulus

Answer 5

Any physical or chemical input that is sensed

Question 6

Atom

Answer 6

basic unit of matter

Question 7

Proton

Answer 7

the + charged particle found in the nucleus of an atom

Question 8

Neutron

Answer 8

the - charged particle found in the nucleus of an atom

Question 9

Electron

Answer 9

the no charge charged particle found the nucleus of an atom

Question 10

Molecule

Answer 10

A group of atoms bonded together forming the smallest fundamental unit of a pure substance

Question 11

Isotopes

Answer 11

atoms of the same element with a different number of neutrons

Question 12

Chemical Bonding

Answer 12

An attraction between two or more atoms resulting in the formation of different chemical substances

Question 13

Chemical Reaction

Answer 13

changes in chemical substances involving bond breaking and/or bond forming resulting in different chemical substances

Question 14

Ion

Answer 14

A positively or negatively charged atom

Question 15

Ionic Bond

Answer 15

formed when one or more are transferred from one atom to another

Question 16

Covalent Bond

Answer 16

forms when electrons are shared between atoms

Question 17

Valence Electrons

Answer 17

The electrons in the outer shell or energy level that are available for bonding

Question 18

pH

Answer 18

the measure of acidity or alkalinity of a solution

Question 19

Acid

Answer 19

a substance that dissolves in water to release hydrogen ion (H+)

Question 20

Base

Answer 20

a substance that dissolves in water to release hydroxide (OH-)