Ch.3 Scientific Measurement

Using Measurement

100

What is a quantity that has both a number and a unit?

measurement

200

Put the following number in scientific notation. 741,560,000,000

7.4156 x 10¹¹

300

What is the difference between accuracy and precision?

accuracy is a measure of how close a measurement comes to the actual or true value. Precision is a measure of how close a series of measurements are to one another.

400

Convert the number 3200 g to scientific notation.

3.2 x 10³ g

500

How many significant digits are in 0.017000 kg?

5 SD

SI units and Quantities

100

What does SI stand for?

International system of units

200

Name the SI unit for length

meter

300

What is the SI unit of time?

second

400

Place in order from smallest  to greatest ms, ns, ks, cs

ns, ms, cs, ks

500

Explain the difference between mass and weight.

Mass is the measure of the amount of matter that an object contains. Weight is a force that measures the pull of gravity on a given mass.

Density

100

Daily Double: What is heavier? 100 lbs of feathers 100 lbs of gold

they are the same.

200

If an object has more volume that it does mass, will the object sink or float?

It will float

300

Density depends on ________ and not on the size of the sample.

composition

400

What is the formula for density?

density = mass / volume

500

What is denser? Gold 19.3 g/cm^{3 or} Ice 0.917 g/cm³

gold

Vocabulary

100

What is a gram used to measure?

mass

200

Daily Double: The measure of how close a series of measurements are to one another is called?

precision

300

If you know the density of a substance and its volume, how do you solve for mass?

density x volume

400

Daily Double: What is the SI unit of volume for measuring a solid?

cubic centimeter

500

If you know the density of a substance and its mass, how do you solve for volume?

mass /density

Miscellaneous

100

Put in scientific notation .0456

4.56 x 10^-2

200

Daily Double 

1.  The water is salty, blue and cold.

2.  The temperature of the water is 5 degrees C.

1. An example of qualitative data.

2. An example of quantitative data.

300

In a graduated cylinder containing several liquid layers, the least dense liquid is found

a. settled on the bottom.    

b. in the middle layer.    

c. in the lightest colored layer.  

d. floating at the top

d. floating at the top.

400

Formula used to find volume of a rectangular box

length x width x height

500

Daily double: What happens to a solid object with a density that is less than water when it is placed in water?

it floats