200 pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt 200pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt Significant Figures SI Units Scientific Method Density Grab Bag

The number of significant figures in this measured quantity: mm

6

The measured value of g has _____ significant figure

4

The sum of km and 43 km is _____ km when expressed with correct number of significant figures

9700 km

The product of 3.5 x 10 4 ml and 1.4 x g/ml is

49

Zeros are always considered significant when

Occur between two nonzero digits

Fundamental SI unit for temperature

Kelvin

Convert 25°C to the Kelvin scale

298 K

Example of an SI base unit

Kilogram, meter, liter, or second

130 K temperature would be what measurement on the Celsius scale

- 130 ° C

When measuring density what should always be specified

Temperature

A tentative answer is called a

Hypothesis

When experimentations occur, you are testing

Variables

State the steps to the scientific method

State the Question Pose an Hypothesis Design an Experiment Evaluate Results

Can you generate a natural law about whether wolves can see color and why?

No – a natural law describes how nature behaves

Why is it not possible for a scientist to state that a scientific theory or law is absolutely and forever correct?

Subject testing Can be modified or changed Observations and experimental results

Gold has a mass of 0.30 grams what would the volume of this piece be if pure gold has a density of 19.3 g/cm 3

.016 cm 3

What is the density of quartz is you have a 7.00 cm 3 sample of quartz that has a mass of 14 grams?

0.5 g/cm 3

The volume of a small piece of gold (density = 19.3 g/cm 3 ) is 13.4 cm 3. What is the volume of a piece of silver (density = 10.5 g/cm 3 ) that has the same mass as the gold?

24.6 g/cm 3

If measurements agree closely but differ widely from the actual value these measurements are considered

Precise but not accurate

Measurements are always uncertain because

Instruments aren’t precise and measurements involve some estimation

How many milliliters are equal to 3.09 liters of water

3090 mL

If the speed of light is kilometers per second what is this number in scientific notation?

3.0 x 10 5

Express both numbers in scientific notation – cm –5,600,000,000,000 g

3.4 x x 10 10

Convert g into the following units into kg and mg. Express in scientific notation

kg mg

Use the four step method to solve a problem. An object has a volume of 316 m 3, a height of 4.00 m, and a width of 8.00 m. What is the length of the object?

9.9 m