ch 1 (vocabulary)

Question 1

observation

Answer 1

something that you notice using your 5 senses

Question 2

inference

Answer 2

know based on past knowledge

Question 3

qualitative

Answer 3

(describing something) sensory descriptions ex. soft, smooth, hard, heavy bumpy, helpful

Question 4

quantitative

Answer 4

measured amounts ex. tools: measuring tape, scale, measuring cup, balance, beaker, thermometer

Question 5

data

Answer 5

set of related observations

Question 6

independent variable

Answer 6

variable being changed

Question 7

dependent variable

Answer 7

variable being measured

Question 8

placebo

Answer 8

pretend treatment or sugar pill

Question 9

constant

Answer 9

variables that are kept the same in control and experimental group

Question 10

homeostasis

Answer 10

keeping your body in constant stable conditions

Question 11

eyepiece

Answer 11

objects are viewed through here. contains a lens that magnifies an image 10x

Question 12

objective lens

Answer 12

magnifies images 4x, 10x, or 40x

Question 13

stage

Answer 13

supports the object being viewed

Question 14

stage clip

Answer 14

hold a slide in place

Question 15

diaphragm

Answer 15

adjusts the amount of light passing through the slide and into the lens

Question 16

coarse ajustment

Answer 16

used to focus the image of an object when being viewed through low-power lens

Question 17

fine adjustment

Answer 17

used to focus the image of an object when being viewed through high-power lense

Question 18

DNA

Answer 18

molecule that stores genetic information in all organisms

Question 19

hypothesis

Answer 19

proposed explanation or answer to a scientific question

Question 20

experiment

Answer 20

process that tests a hypothesis by collecting information under controlled conditions

Question 21

control group

Answer 21

sample used as a compasion

Question 22

theory

Answer 22

proposed explanation for a wide variety of observations and experimental results

Question 23

metabolism

Answer 23

all chemical processes that synthesize or break down materials within an organism

Question 24

evolution

Answer 24

change in a species over time; process of biological change by which descendants come to differ from their ancestors