Study Guide

Question 1

Steps of an experiment?

Answer 1

Hypothesis, research, testing, observing, concluding

Question 2

What the goal of science is and is not?

Answer 2

To understand the natural world. Not something that is guessed

Question 3

Hypothesis

Answer 3

Educated guess

Question 4

Controlled experiment

Answer 4

When only one variable is changed at a time

Question 5

Why scientists publish experiments

Answer 5

So other scientists can test what they’ve done and see their work

Question 6

Theory

Answer 6

Well supported hypothesis

Question 7

Biology

Answer 7

Study of living things

Question 8

8 characteristics of living things

Answer 8

Living things are made up of units called cells
Living things reproduce
Living things are based on a universal genetic code
Living things can grow and develop
Living things obtain and use materials and energy
Living things respond to their environment
Living things maintain a stable internal environment
Living things change over time

Question 9

Homeostasis

Answer 9

A stable internal environment

Question 10

Metabolism

Answer 10

When an organism builds up and breaks down materials as it carries out its life processes

Question 11

Types of microscopes

Answer 11

Regular, compound light, TEM, SEM

Question 12

Cell culture

Answer 12

A group of cells that develops from a single original cell

Question 13

Fractionation

Answer 13

Separation of homogeneous sets from a larger population of cells

Question 14

Inference

Answer 14

Logical interpretation of data

Question 15

Cell

Answer 15

Basic unit of life

Question 16

Data

Answer 16

Information gathered from observations

Question 17

Redi’s experiment

Answer 17

Trying to prove spontaneous generation. He put gauze on one jar, leaving one uncovered. Both had meat in them, with flies around them. The uncovered jar had maggots on it

Question 18

Spontaneous generation

Answer 18

Idea that life can arise from nonliving matter

Question 19

Manipulated variable

Answer 19

Variable that is changed on purpose in a controlled experiment

Question 20

Responding variable

Answer 20

Changes in response to the manipulated variable

Question 21

Why is it important to only change on variable at a time?

Answer 21

If you change more than one variable at a time then you won’t know which variable affected the outcome

Question 22

3 particles of an atom

Answer 22

Proton- positive, nucleus
Electron- negative, orbits nucleus
Neutron- neutron, nucleus

Question 23

How to find the number of particles in an atom

Answer 23

Atomic mass

Question 24

Isotopes

Answer 24

Can have different number of protons

Question 25

Atom

Answer 25

Basic unit of matter

Atomos

Question 26

Element

Answer 26

A pure substance that consists entirely of one atom

Question 27

1st 10 elements

Answer 27

Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon

Question 28

Metric system

Answer 28

System used worldwide to compare data easily

Question 29

What are multiples based on

Answer 29

10

Question 30

Ionic bond

Answer 30

Transfer of electrons between atoms

Question 31

Covalent bond

Answer 31

Sharing of electrons between atoms

Question 32

Nitrogen fixation

Answer 32

Nitrogen is made into organic compounds

Question 33

Denitrification

Answer 33

Nitrate reduction

Question 34

Primary productivity

Answer 34

Rate at which energy is converted in organic substances

Question 35

Limited nutrients

Answer 35

There is less of that nutrient which the process of growth