Units of Life

Question 1

The smallest basic unit of matter is the

Answer 1

Atom

Question 2

Which of the following is formed when an atom gains or loses electrons

Answer 2

Ion

Question 3

Atoms in molecules share pairs of electrons when they make

Answer 3

Covalent Bonds

Question 4

What gives water many properties that are important to living things

Answer 4

Hydrogen bonds

Question 5

Which of the following solutions has the highest H ion concentration

Answer 5

A solution with a PH of 1

Question 6

What is unique about carbon

Answer 6

Bonding properties

Question 7

The four main types of carbon based molecules in organisms are carbohydrates, lipids, Nucleic acids, and

Answer 7

Proteins

Question 8

Both animal fats and plant oils are made up of glycerol And

Answer 8

Fatty acids

Question 9

Chemical reactions that absorb more energy than they release are called

Answer 9

Endothermic

Question 10

Substances are changed into different substances when bonds break and form during

Answer 10

Chemical reactions

Question 11

The activation energy needed for a chemical reaction is decreases by a

Answer 11

Catalyst

Question 12

Which phrase best describes an atom

Answer 12

Smallest basic unit of matter

Question 13

Which aspect of a chemical reaction is affected by enzymes

Answer 13

Rate

Question 14

How do ions form

Answer 14

Atoms gain or lose electrons

Question 15

How are atoms held together in molecules

Answer 15

They forms covalent bonds

Question 16

How does the addition of an acid affect a neutral solution

Answer 16

The H ion concentration is increased

Question 17

Chemical reactions change substances into different substances by

Answer 17

Breaking and forming bonds

Question 18

What is the term for the substances that are changed during a chemical reaction

Answer 18

Reactants

Question 19

Microscopes led to the discovery that all organisms are

Answer 19

Made of cells

Question 20

Together, all of the chemical processes that build up and break down materials in organisms called

Answer 20

Metabolism

Question 21

The substance that covers the majority if earth surface and also makes up the largest percentage of your cells is

Answer 21

Water

Question 22

What is the name of the negatively charged particles

Answer 22

Electtons

Question 23

Through photosynthesis, plants convert energy from sunlight into

Answer 23

Chemical energy