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Flashcards in 1st Semester Exam Deck (53)
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1

What is an controlled experiment

An experiment where only one variable is changed at a time

2

How does science differ from other disciplines

Science relies strictly on facts or things that can be proven

3

When is a hypothesis useful

When it is testable

4

The work of scientists begins with...

Careful observations

5

What is an observation

Process of gathering information

6

What is homeostasis

When an organism maintains a stable internal condition

7

Where may a hypothesis come from

Prior knowledge, observations, logical inferences

8

What is an inference

A logical interpretation based on prior knowledge

9

What is not a goal of science or how science works

Something you can't prove

10

What is spontaneous generation

The idea that life could arise from nonliving matter

11

Why do scientists need to publish the details of important work

So other scientists can replicate each other's experiments and further test them

12

What is osmosis

The diffusion of water through a selectively permeable solution

13

What is biology

The study of life

14

What are ribosomes

Small particles of RNA and protein found throughout cytoplasm; where proteins are assembled

15

What is the cell wall

Strong, supporting layer around the cell

16

A tissue is composed of what

Individual or similar cells

17

What is the cell membrane

Thin, flexible barrier around the cell that regulates what comes in and out of the cell

18

What are chromosomes

Threadlike structures in the nucleus that contain genetic info that is passed from one generation of cells to the next

19

What is a theory

When a hypothesis becomes so well supported

20

What are the 7 characteristics of living things

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

21

What is the nucleus

Found in the center of the cell, control center of the cell, and contains protons and neutrons

22

What is cell culture

A group of cells that develop from a single original cell

23

What is metabolism

When an organism builds up or breaks down materials

24

What is the mitochondria

"Powerhouse" of the cell, where the cell gets its energy

25

What is a compound light microscope

A microscope that allows light to pass through a specimen and uses two lenses to for an image

26

What is the chloroplast

Works with the mitochondria to provide the cell with energy

27

What is a microscope

A tool that magnifies objects that are to small to see with the unaided eye

28

What is cell fractionation

The process used to separate the different cell parts

29

What three particles make up the atom and what is their charges and where are they found

Protons-positive, in the nucleus; neutrons-neutral, in the nucleus; electrons-negative, orbits around the nucleus

30

What are lysosomes

Remove waste and unwanted materials from the cell