Science test #1

Question 1

What is the smallest unit of matter?

Answer 1

Atom

Question 2

What charasteristics do all living things share?

Answer 2

Mass and Matter

Question 3

What is homeostasis?

Answer 3

The ability to maintain a steady state despite changing conditions

Question 4

What are the advantages of using computer models in biological research?

Answer 4

provide a framework within which to summarize existing knowledge

Question 5

What is a hypothesis?

Answer 5

Tries to predict or determine the outcome of your experiment even before the experiment is done

Question 6

What is a theory?

Answer 6

Explanations for some phenomena based on observation, and reasoning

Question 7

What is the definition of a species?

Answer 7

A different animal or insect

Question 8

What are four main types of carbon-based compounds found in living things?

Answer 8

Carbohydrates, lipids, protiens, nucleic acids

Question 9

What is an ion?

Answer 9

An atom that has gained or lost one or more electrons

Question 10

What unique quality does carbon posses that allows it to form large organic compounds?

Answer 10

Carbon has an exeptional ability to bind with a wide variety of other elements

Question 11

What is the simplest particle of an element?

Answer 11

Atom

Question 12

All atoms consist of three types of smaller particles:

Answer 12

Protons + , Neutrons , Electrons -

Question 13

Mass=

Answer 13

weight

Question 14

What are elements?

Answer 14

pure substances that cannot be broken down

Question 15

What is a compound?

Answer 15

A pure substance made of atoms of two or more elements

Question 16

What are molecules?

Answer 16

molecules are two or more atoms held together by covalent bonds.

Question 17

Salt=

Answer 17

sodium chloride

Question 18

a. What are atoms that lose electrons called?

b. What are atoms that gain electrons called?

Answer 18

a. positive ions

b. negative ions