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Flashcards in 9 Weeks Exam Deck (56)
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1

What are the steps of conducting an experiment

1.Purpose
2.Hypothesis
3.Research/gather data
4.Testing/experimenting
5.Conclusion is

2

What is a hypothesis

Educated guess

3

What is a controlled experiment

When only one variable is changed at a time in an experiment

4

Why do scientists publish their experiments

So scientists can test one another's investigations and see the work that's been done

5

What is a theory

A hypothesis that becomes so well supported that scientists consider it a theory

6

What is biology

The science that seeks to understand the living world

7

What are 5 characteristics of living things

1. Made up of units called cells
2. Reproduce
3. Respond to their environment
4. Grow and develop
5. Change over time

8

What is homeostasis

When organisms keep stable internal conditions

9

What is metabolism

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

10

What are all of the microscopes and their definitions

Regular microscope- helps see structures that are too small to see with an unaided eye
Compound might microscope- allow light to pass through the specimen and use two lenses to form an image
TEMS- shine a beam of electrons through a thin specimen
SEMS- scan a narrow beam of electrons back and forth across the surfaces of objects

11

What is cell culture

Where a group of cells originates from a single cell

12

What is cell fractionation

Separates different cell parts

13

What is an inference

A logical interpretation of data

14

What is a cell

The basic unit of life

15

What Is the metric system and why is it used

A decimal system of measurement whose units are based on certain physical standards and are scaled on multiples of 10; they need to replicate each other's experiments and most experiments involve measurements

16

What is data

Information that is gathered

17

What was redi trying to prove and how did he prove it

He was trying to prove that keeping flies away from meat would prevent the appearance of maggots. He proved this by conducting an experiment that includes having 4 uncovered jars of meat and 4 covered jars of meat meat and seeing if the uncovered jars attract maggots. The answer is yes.

18

What is spontaneous generation

The idea that life could arise from non living matter

19

What is a responding variable

The variable that is observed and that changes in response to the manipulated variable

20

What is a manipulated variable

The variable that is deliberately changed

21

Why is it important to only test one variable at a time

So that you know what's affecting the change in the experiment

22

What are the 3 particles that make up an atom and what are their charges

Protons- positive
Neutrons- neutral
Electrons- negative

23

Where are all 3 particles located in an atom

The protons and neutrons are inside the nucleus and the electrons are orbiting outside the nucleus

24

What is the goal of science and what is it not

To investigate and understand the natural world; not something that you can't prove

25

How do you find the number of protons neutrons and electrons

Protons= the atomic number
Electrons= the same number as the protons
Neutrons= subtract the number of protons ms from the atomic mass number(round the mass number to the nearest whole number)

26

What are isotopes

atoms of the same element that differ in the number of neutrons they contain

27

What is an atom and what is the Greek word for it

A basic unit of matter; atomos

28

What is an element

A pure substance that consists entirely of one type of atom

29

What are the first 10 elements and their atomic mass

.

30

What are covalent and ionic bonds

An ionic bond is formed when one or more electrons are transferred from one atom to another. A covalent bond forms when electrons are shared between atoms.