Ch 1

Question 1

What is the value of the prefix Giga (G)

Answer 1

10^9 or 1,000,000,000

Question 2

What is the value of the prefix Mega (M)

Answer 2

10^6 or 1,000,000

Question 3

What is the value of the prefix Kilo (k)

Answer 3

10^3 or 1,000

Question 4

What is the value of the prefix hecto (h)

Answer 4

10^2 or 100

Question 5

What is the value of the prefix deka (da)

Answer 5

10^1 or 10

Question 6

What is the value of the prefix deci (d)

Answer 6

10^-1 or 0.1

Question 7

What is the value of the prefix centi (c)

Answer 7

10^-2 or 0.01

Question 8

What is the value of the prefix milli (m)

Answer 8

10^-3 or 0.001

Question 9

What is the value of the prefix micro (u)

Answer 9

10^-6 or 0.000,001

Question 10

What is the value of the prefix Nano (n)

Answer 10

10^-9 or 0.000,000,001

Question 11

What is the value of the prefix Pico (p)

Answer 11

10^-12 or 0.000,000,000,001

Question 12

what system of measurements is used in science

Answer 12

The metric system is used for science and in most countries, it’s based on a system of multiples of 10.

Question 13

what is metric also known as

Answer 13

It is also known as the international system of units (SI)

Question 14

what are the 4 main parts of the metric system

Answer 14

It has 4 primary components: Length, Mass, Volume and temperature

Question 15

what is length

Answer 15

• measurement of distance
• The base unit is the meter (m)
• All other units related to the meter, ex 1Km = 1,000m, 100cm = 1m, etc

Question 16

what is mass

Answer 16

• measure of the matter in a substance/object
• The base unit is the gram (g)
• Kilograms are commonly used in science
• All other units related to the gram, ex 1Kg = 1,000g, 1,000mg = 1g, etc
• Tons are also a metric used, 1 metric ton = 1,000kg

Question 17

what is weight

Answer 17

• Weight is a measure of the gravitational pull on an object
• It varies depending on the gravity experienced by the object, ie a 60kg person on earth weighs 10kg on the moon
• Also used the gram, kilogram, etc as units

Question 18

what is volume

Answer 18

• The space occupied by a substance
• For liquids the base unit is the litre (L)
• All other units related to the litre
• For solids the base unit is m^3
• All other units related to m^3, ex 1m^3 = 1,000,000cm^3

Question 19

what is temperature

Answer 19

• Uses the degree celsius as a unit
• No derived units
• degrees kelvin as also used which have the same intervals, a change in 1 degree celsius is a change in 1 degree kelvin. The difference is 0 degrees kelvin is equal to -273.15 degrees celsius (absolute zero)

Question 20

what is science

Answer 20

• Science is the process of observation and tests used to prove or disprove a hypothesis
• the goal of science is to understand the world around us

Question 21

what is the scientific method

Answer 21

The scientific method is described as organized common sense, and it’s a series of steps to form a logical conclusion:

Question 22

what are the steps of the scientific method

Answer 22

• Observing and stating a problem
• Forming a hypothesis
• Testing the hypothesis
• Recording and analyzing data
• Forming a conclusion
• Replicating the work

Question 23

how do you observe and state a problem

Answer 23

Start with an observation and form a question of problem

Question 24

how do you form a hypothesis

Answer 24

Gather information and form a possible explanation for your problem

Question 25

how do you test a hypothesis

Answer 25

Test your hypothesis through a series of experiment, observations and tests

Question 26

what is a controlled experiment and its two parts

Answer 26

A controlled experiment allows us to isolate a single factor or variable in it. A “control set up” established the standard situation and an “experimental set up” tests the variables effects

Question 27

how do you record and analyze date

Answer 27

Carefully record the data and represent graphically or otherwise to analyze the data

Question 28

how do you form a conclusion

Answer 28

repeat testing and hypothesis until a functional model is found and a conclusion can be made

Question 29

why should you replicate your work

Answer 29

Science is repeatable, duplicating an experiment should lead to the same results

Question 30

what is a scientific theory

Answer 30

Once a hypothesis is test enough and confirmed sufficient it is called a theory
a theory is a useful, dependable prediction about the world