Daily Quiz:

Daily Quiz:

1. Which of the following is a base unit?

A. volume

B. length

C. density

D. velocity

Daily Quiz:

2. If there were such a thing as a megadollar, it would be worth

A. $1,000

B. $100,000

C. $1,000,000

D. $100,000,000

Daily Quiz:

3. Density is equal to

A. mass x volume

B. mass ÷ volume

C. volume ÷ mass

D. length x width x height

Daily Quiz:

4. Adamantium has a density of 6g/cm3. which of the following samples is made of adamantium?

A. mass = 36 g, vol = 12 cm3

B. mass = 9 g, vol = 1.5cm3

C. mass = 3 g, vol = 2 cm3

Daily Quiz:

1. Which of the following is a base unit?

A. volume

B. length

C. density

D. velocity

Daily Quiz:

1. Which of the following is a base unit?

A. volume

B. length

C. density

D. velocity

Daily Quiz:

2. If there were such a thing as a megadollar, it would be worth

A. $1,000

B. $100,000

C. $1,000,000

D. $100,000,000

Daily Quiz:

2. If there were such a thing as a megadollar, it would be worth

A. $1,000

B. $100,000

C. $1,000,000

D. $100,000,000

Daily Quiz:

3. Density is equal to

A. mass x volume

B. mass ÷ volume

C. volume ÷ mass

D. length x width x height

Daily Quiz:

3. Density is equal to

A. mass x volume

B. mass ÷ volume

C. volume ÷ mass

D. length x width x height

Daily Quiz:

4. Adamantium has a density of 6g/cm3. which of the following samples is made of adamantium?

A. mass = 36 g, vol = 12 cm3

B. mass = 9 g, vol = 1.5cm3

C. mass = 3 g, vol = 2 cm3

Daily Quiz:

4. Adamantium has a density of 6g/cm3. which of the following samples is made of adamantium?

A. mass = 36 g, vol = 12 cm3

B. mass = 9 g, vol = 1.5cm3

C. mass = 3 g, vol = 2 cm3

Tonight’s Homework:

• Read pages 31-33

• Work practice problems 12, 13, 14, 15, 16

Today we will…1. Learn about scientific notation

2. See the effect of adding 40 zeros to a number.

Used to write very big

and very small numbers.

Scientific Notation

•Move the decimal place so that the number is between 1 and 10

•Count how many spaces you moved the decimal point

•If you moved it to the left, the exponent is positive; to the right, it is negative.

Scientific Notation

The diameter of the sun is

1,390,000,000 m

Scientific Notation

The diameter of the sun is

1,390,000,000 m

1.39 x 109 m

Scientific Notation

The diameter of the sun is

1,390,000,000 m

1.39 x 109 m

Scientific Notation

factor exponent

The mass of a proton is

0.000,000,000,000,000,0

00,000,000,001,672,62 kg

Scientific Notation

The mass of a proton is

0.000,000,000,000,000,0

00,000,000,001,672,62 kg

1.672,62 x 10-27

Scientific Notation

Adding:

If the exponents are the same, add the factors and leave the exponents alone.

Scientific Notation

Adding numbers is easy if the exponent is the same.

7.35 x 102 m

+ 2.43 x 102 m

Scientific Notation

Adding numbers is easy if the exponent is the same.

7.35 x 102 m

+ 2.43 x 102 m

9.78 x 102 m

Scientific Notation

If the exponents are not the same, you have to move the decimal point on one of the numbers to make them the same.

Scientific Notation

4.38 x 106

+ 1.51 x 107

?

Scientific Notation

4.38 x 106

+ 1.51 x 107

1.51 x 107 = 15.1 x 106

Scientific Notation

4.38 x 106

+ 15.1 x 106

19.48 x 106

Scientific Notation

4.38 x 106

+ 15.1 x 106

19.48 x 106

Scientific Notation

Is this number between 1and 10?

4.38 x 106

+ 15.1 x 106

19.48 x 106

= 1.948 x 107

Scientific Notation

4.38 x 106

+ 15.1 x 106

19.48 x 106

= 1.948 x 107

Scientific Notation

The factorgot smaller

4.38 x 106

+ 15.1 x 106

19.48 x 106

= 1.948 x 107

Scientific Notation

The factorgot smaller

The exponent

gets bigger

Scientific Notation

Multiplying:

Multiply the factors and add the exponents. (The exponents do not have to be the same.)

2 x 104

x 3 x 105

6 x 109

Scientific Notation

Homework

• Read pages 31-33

• Work practice problems 12, 13, 14, 15, 16