CONFIDENTIAL 1

Good Afternoon!Today we will be learning about

Temperature, changes, & negative numbers

Let’s warm up :

Complete the conversion tables:

Hours 4 7 8

Minutes

1)

Calculate how much time has elapsed between:

2) 5:05 A.M. and 10:10 A.M.?

3) 2:20 P.M. and 5:40 P.M.?

4) 9:40 P.M. and 2:25 A.M.?

CONFIDENTIAL 2

Let’s review the previous topicCalendar and Years

Calendar displays the layout of the dates of a month and their corresponding day of the week of a

particular year.Ordinal Number: A number used to tell order or

position. They are used to say a date in a calendar.

EXAMPLE: 1st, 7th, and 19th, or first, seventh, and nineteenth are ordinal numbers.

June 26 can also be called the

26th of June, or the twenty-sixth.

The layout of the calendar helps to know

dates and their corresponding day in a

particular month.

CONFIDENTIAL 3

Review

A day has 24 hours. There are

7 days in a week.

DAYS

Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

A year has 12 months.

MONTH NO. OF DAYS

January 31

February 28

March 31

April 30

May 31

June 30

July 31

August 31

September 30

October 31

November 30

December 31

CONFIDENTIAL 4

ReviewReview

A year is 365 days. But in the Leap year the number of days become 366 as the month February

has 29 days.

The Leap year occur once every four years.The years 2000, 2004, 2008, 2012,………… are Leap

years.Counting with Years

1 decade 10 years

1 century 100 years

1 century 10 decade

1 millennium 1,000 years

1 millennium 10 century

CONFIDENTIAL 5

Suppose today is May 8. How many days is it until Mother’s Day?

You can use a calendar to find the elapsed time.

May 2000

S M T W T F S

1 2 3 4 5 6

7 8 9 10 11 12 13

14Mother’s day

15 16 17 18 19 20

21 22 23 24 25 26 27

28 29 30 31

Count on from May 8 to May 14.

It is six days from May 8 to May 14.

Review

CONFIDENTIAL 6

Review

You can use a calendar to find the elapsed time.

May 2000

S M T W T F S

1 2 3 4 5 6

7 8 9 10 11 12 13

14 15 16 17 18 19 20

21 22 23 24 25 26 27

28 29 30 31

Suppose today is May 15 How many days is it until June 17?

Count on from May 15 to May 31 .i.e., 17 days in May.

June 2000

S M T W T F S

1 2 3

4 5 6 7 8 9 10

11 12 13 14 15 16 17

18 19 20 21 22 23 24

25 26 27 28 29 30

Step1:

CONFIDENTIAL 7

Review

June 2000

S M T W T F S

1 2 3

4 5 6 7 8 9 10

11 12 13 14 15 16 17

18 19 20 21 22 23 24

25 26 27 28 29 30

i.e.

17 days in May + 16 days in June

= 33 days

Add the number of days in May with number of days before June 17.

Step2:

Therefore,

It is 33 days from May 15 to June 17.

CONFIDENTIAL 8

Review

You can use a calendar to find the Date.

May 2000

S M T W T F S

1 2 3 4 5 6

7 8 9 10 11 12 13

14 15 16 17 18 19 20

21 22 23 24 25 26 27

28 29 30 31

June 2000

S M T W T F S

1 2 3

4 5 6 7 8 9 10

11 12 13 14 15 16 17

18 19 20 21 22 23 24

25 26 27 28 29 30

Suppose today is May 23. What is the date after 21 days?

Use May 23 as the first day and count on 21 days.

The 21 days after May 23 is June 13.

CONFIDENTIAL 9

Let’s start the topicTemperature, changes, & negative numbers

Temperature: It is a measurement that tells how hot or cold something is.

When the temperature rises, I wear lighter clothing.

There are 2 scales for measuring temperature:

1) Fahrenheit Scale

2) Celsius Scale

The metric system uses the Celsius scale to measure temperature. However, temperatures are still measured on the Fahrenheit scale in the U.S.

CONFIDENTIAL 10

The Fahrenheit Scale and the Celsius Scale measure the same thing

(temperature!), just using different numbers.

If you freeze water, it measures 0° in Celsius, but 32° in Fahrenheit.

If you boil water, it measures 100° in Celsius, but 212° in Fahrenheit.

The difference between freezing and boiling is 100° in Celsius, but 180° in Fahrenheit.

Therefore each degree on the Fahrenheit scale is equal to 100 or 5 degrees on the Celsius scale. 180 9

CONFIDENTIAL 11

Celsius Thermometer Fahrenheit Thermometer

100

80

60

40

20

10

0

-10

210

190

170

110

70

50

30

-20

100

80

60

40

20

10

0

-10

Water Freezes

Normal Body

temperature

Water Boils1000C 2120F

370C 98.40F

00C 320F

CONFIDENTIAL 12

The temperatures below 0°F or 0°C are negative temperatures.

You read 20 degrees Fahrenheit below zero as - 20°F.

Temperatures can be below 0°F or 0°C.

What is the temperature change from 15°F to -50°F?

Step 1: Find the change in temperature from 15°F to 0°F .

The change is 15°F.

CONFIDENTIAL 13

Step 2: Find the change in temperature from 0°F to -50°F.

The change is 50°F.

Step 3: Add the 2 changes.

15°F + 50°F = 65°F.

The temperature change is 65°F.

CONFIDENTIAL 14

Conversion Method

To convert from Celsius to Fahrenheit , first multiply by 180 or 9, then add

32. 100 5

Celsius to Fahrenheit

Celsius to Fahrenheit = (°C × 9) + 32 = °F

5

Fahrenheit to Celsius To convert from Fahrenheit to Celsius, first subtract 32 , then multiply by 100 or 5. 180 9Fahrenheit to Celsius =(°F - 32) x 5 =

°C 9

CONFIDENTIAL 15

Conversion Method

Convert 98.6° Fahrenheit to Celsius.

First: 98.6° - 32 = 66.6

Then: 66.6× 5 = 333 = 37° C 9 9

Therefore,

98.6° F = 37° C

Fahrenheit to Celsius =(°F - 32) x 5 = °C

9

CONFIDENTIAL 16

Conversion Method

Convert 26° Celsius to Fahrenheit.

First: 26° × 9 = 234 = 46.8 5 5

Then: 46.8 + 32 = 78.8° F

Therefore,

26° C = 78.8° F

Celsius to Fahrenheit = (°C × 9) + 32 = °F

5

CONFIDENTIAL 17

Typical Temperatures

°C °F Description

100 212 Water boils

40 104 Hot Bath

37 98.6 Body temperature

30 86 Beach weather

0 32 Freezing point of water

CONFIDENTIAL 18

Assessment

Find the temperature change from:

1) 23°F to -25°F

3) 64°C to -12°C

2) 108°F to -2°F

4) 59°C to -42°C

CONFIDENTIAL 19

Convert Celsius to Fahrenheit.

5) 24° C

6) 37° C

7) 69° C

CONFIDENTIAL 20

Convert Celsius to Fahrenheit.

8) 240° F

9) 89° F

10) 169° F

CONFIDENTIAL 21

Very Good!Let's Review

Temperature: It is a measurement that tells how hot or cold something is.

When the temperature rises, I wear lighter clothing.

There are 2 scales for measuring temperature:

1) Fahrenheit Scale

2) Celsius Scale

The metric system uses the Celsius scale to measure temperature. However, temperatures are still measured on the Fahrenheit scale in the U.S.

CONFIDENTIAL 22

Review

The Fahrenheit Scale and the Celsius Scale measure the same thing

(temperature!), just using different numbers.

If you freeze water, it measures 0° in Celsius, but 32° in Fahrenheit.

If you boil water, it measures 100° in Celsius, but 212° in Fahrenheit.

Therefore each degree on the Fahrenheit scale is equal to 100 or 5 degrees on the Celsius scale. 180 9

CONFIDENTIAL 23

Review

Celsius Thermometer Fahrenheit Thermometer

100

80

60

40

20

10

0

-10

210

190

170

110

70

50

30

-20

100

80

60

40

20

10

0

-10

Water Freezes

Normal Body

temperature

Water Boils1000C 2100F

370C 98.40F

00C 320F

CONFIDENTIAL 24

Review

The temperatures below 0°F or 0°C are negative temperatures.

You read 20 degrees Fahrenheit below zero as - 20°F.

Temperatures can be below 0°F or 0°C.

What is the temperature change from 15°F to -50°F?

Step 1: Find the change in temperature from 15°F to 0°F .

The change is 15°F.

Step 2: Find the change in temperature from 0°F to -50°F.

The change is 50°F.

Step 3: Add the 2 changes.

15°F + 50°F = 65°F.

The temperature change is 65°F.

CONFIDENTIAL 25

Review

Conversion Method

Convert 98.6° Fahrenheit to Celsius.

First: 98.6° - 32 = 66.6

Then: 66.6× 5 = 333 = 37° C 9 9

Therefore,

98.6° F = 37° C

Fahrenheit to Celsius =(°F - 32) x 5 = °C

9

CONFIDENTIAL 26

Review

Conversion Method

Convert 26° Celsius to Fahrenheit.

First: 26° × 9 = 234 = 46.8 5 5

Then: 46.8 + 32 = 78.8° F

Therefore,

26° C = 78.8° F

Celsius to Fahrenheit = (°C × 9) + 32 = °F

5

CONFIDENTIAL 27

You have done a nice job.See you in the next session.