Ch 3 The Tools Of Science: Study Guide

Front 1

Metric system, SI, mass, meniscus, density

Back 1

Metric system: measurement system based on the number 10

SI: Inter, system of units

Mass: measure of the amount of matter in an object (Kg)

Meniscus: curve

Density: Measure of mass contained in a vol.

Front 2

Weight and Volume

Back 2

Weight: a measure of the force of gravity acting on an object

Volume: the amount of space an object or substance takes up (m3)

Front 3

Why do Scientist use a standard measurement system?

Back 3

Allows scientist to compare data and communicate with each other about their results

Front 4

What is length, What is unit

Back 4

Length: the distance from one point to another

Unit: quantity

Front 5

How do you find the volume of regular and irregular shapes

Back 5

Regular: LxWxH

Irregular: Immerse object in water and measure how much the water lvl rises

Front 6

How do you measure Density

Back 6

Grams divided my cm3

Front 7

What are the units for celsius and Kelvin

Back 7

Celsius: (c)

Kelvin: (K)

Front 8

Unit for time?

Back 8

Second, (S)

Front 9

Estimate, Accuracy, Precision

Back 9

Estimate: approximation of a number based on reasonable assumptions

Accuracy: how close a measurement is to the true or accepted value

Precision: how close a group of measurements are to each other

Front 10

Diference between Accuracy and Precision

Back 10

Front 11

Mean, Median, Mode, Range

Back 11

Mean: avg of a set of data ( add up all #'s then divide by total of #'s)

Median: middle # in a set of data

Mode: # appearing most

Range: set of data ( subtract biggest # from smallest)

Front 12

Anomaulus data

Back 12

data that don't fit with rest of data

ex: 20, 30, 22, 21

30

Front 13

Difference between reasonable and anomalous data

Back 13

?

Front 14

graph, nonlinear, linear

Back 14

graph: representation of a set of objects where some pairs of objects

Linear: straight line w/ pts on line

Non Linear: curvy line with scattered pts

Front 15

safety symbol

Back 15

Front 16

What should you do when preparing for a lab?

Back 16

to take data, safety equip,

Front 17

Most important rule in a lab?

Back 17

Follow directions

Front 18

What should you do at the end of a lab?

Back 18

Clean up

Front 19

When in the "field" of precautions, why should you take?

Back 19

?

Front 20

What should you do if an accident occurs?

Back 20

Tell someone: an adult. If serious: 911 etc