Science

Question 1

Food Chain

Answer 1

Who eats who in an ecosystem step by step

Question 2

Food Web

Answer 2

All the food chains in an ecosystem

Question 3

Primary Succession

Answer 3

succession that occurs when no soil exists except for bare rock. The pioneer species is the first species to colonize these areas

Question 4

Secondary succession

Answer 4

succession that takes place on areas that already support life

Question 5

Exponential growth

Answer 5

Growth that occurs when there are no limiting factors, and when organisms can reproduce at a consistent rate



Question 6

Logistical growth

Answer 6

growth that happens when there are limiting factors, occurs when a population has been growing exponentially slows or stops

Question 7

Valence Electrons

Answer 7

single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom

Question 8

Valence electrons determine how reactive an atom will be.

Answer 8

Atoms want to have an outer shell that is full of electrons. The magic number is 8. The closer an atom is to 8 (either 1 or 2 on one end or 6 or 7 on the other), the more reactive it will be. If an atom has a full outer shell, it will not be reactive at all. These element are considered inert, meaning that they are not reactive.

Question 9

Covalent

Answer 9

formed with atoms share electrons

Question 10

Ionic

Answer 10

Formed when electrons are transferred from one atom to another

Question 11

What elements are essential for life?

Answer 11

oxygen, carbon, hydrogen, nitrogen, and sulfur

Question 12

What makes carbon such a good atom for life?

Answer 12

Carbon can readily form bonds with other atoms.

Question 13

What is a hydrogen bond?

Answer 13

Hydrogen bond: a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom

Question 14

Reactants

Answer 14

independent variable, the chemicals that exist in the beginning

Question 15

Products

Answer 15

dependent variable, the chemicals that exist after the reaction are called products

Question 16

What is an enzyme?

Answer 16

Enzymes are biological catalysts.

Question 17

Substrate

Answer 17

the reactants of an enzyme-catalyzed reaction

Question 18

Products

Answer 18

the result of chemical reactions

Question 19

Active Site

Answer 19

binds to substrate

Question 20

Enzyme substrate complex

Answer 20

binds substrate to the enzyme

Question 21

How do enzymes speed up chemical reactions and how can they be affected by changes in pH and temperature?

Answer 21

Enzymes speed up chemical reactions as they decrease the activation energy needed to occur. Changes in pH alters the enzymes structure and changes in temperature can make the enzyme move more or less, affecting chemical reactions.

Question 22

What is an organelle?

Answer 22

Organelles are “little organs”.

Question 23

Valence Electrons

Answer 23

single electron or one more in the outer shell of an atom that is responsible for the chemical properties of the atom

Question 24

Valence Electrons

Answer 24

single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom

Question 25

Valence electrons determine how reactive an atom will be.

Answer 25

Atoms want to have an outer shell that is full of electrons. The magic number is 8. The closer an atom is to 8 (either 1 or 2 on one end or 6 or 7 on the other), the more reactive it will be. If an atom has a full outer shell, it will not be reactive at all. These element are considered inert, meaning that they are not reactive.

Question 26

Substrate

Answer 26

the reactants of an enzyme-catalyzed reaction