Flashback 3 Wednesday 8/18

1. Which of the following is NOT an example of a disease? A. a broken leg B. common cold C. athlete's foot D. malaria

2. An organ is a A. group of similar cells that perform similar functions. B. small structure that performs a specialized function within a cell. C. group of tissues that work together to perform a specific function. D. group of body parts that perform several closely related functions.

3. The early growth state of a plant embryo is A. pollination B. germination C. fertilization D. dormancy

4. Which of the organisms in the sample food web are producers?

A. fish B. plants C. insects D. bacteria and fungi

Flashback 3 Wednesday 8/18

5. When the hare population is at its highest level, what happens to the lynx population?

A. It decreases. B. It increases slightly. C. It reaches its highest level. D. It does not change.

Flashback 3 Wednesday 8/18

The answer is:

ACBCB

SCIENTIFIC METHOD CONTINUED

Units of MeasurementPart 1

Learning Targets:

Students will be able to identify units of measurements used in the scientific community.

Test Your Memory

Pay close attention to the video about PIGGY

He is going to show you 7 conversions of English to Metric measurements. Which pair can remember the most?

Don’t worry, I will show it twice.

No cheating: You can not write down answers as the video is shown (remove all paper from your desk until I give the all clear).

http://www.youtube.com/watch?v=Kr_zrP5RSQc

Scientific Measurement

Scientists around the world use a system of measurements called the International System of Units, or SI, to make observations.

The units used for scientific measurements are those of the metric system.

Because SI uses certain metric units that are based on units of ten, multiplication and division are easy to do.

In America, we typically use the English system.

English and Metric

The Metric System

Prefix Symbol Factor of base unit

Kilometer km 1, 000

Meter M 1

Centimeter cm .01

Millimeter mm .001

Length and Mass

The SI base unit of length is the meter (m), a distance only slightly longer than a yard.

Mass is a measure of the amount of material in an object. The SI base unit of mass is the gram (g). (which is equal to about 2.2 pounds (lb)).

Volume

Volume is usually the measurement used to see how much liquid is in a container.

There are several ways to measure volume, but the most common way is in liters (L).

Volume

The devices used most frequently in chemistry to measure volume are illustrated in Figure 1.20.

Density

Density is the amount of mass in a unit volume of the substance:

Mass/Volume = Density

The densities of solids and liquids are commonly expressed in units of grams per milliliter (g/ml).

PLEASE WRITE ALL OF THE QUESTIONS AND YOUR ANSWERS INTO YOUR NOTEBOOKS

Challenge Questions

Review

1. What does each unit represent?(a) mm = ________________________ (b) m = ________________________(c) cm = ________________________ (d) km = ________________________

2. How much does each one equal?(a) 1 m = _______ cm (b) 1 cm = _______ mm

(c) 1 km = _______ m

Millimeter

MeterCentimeter

Kilometer

100 101000

Challenge

3. Which measurement is the largest? Circle your answer for each pair.(a) 1 mm or 1 cm(b) 1 m or 1 km(c) 1 m or 1 cm

Challenge

4. Circle the BEST metric unit for each.

(a) The length of an eyelash: mm cm m km(b) The height of a flagpole: mm cm m km(c) The length of a strand of spaghetti:

mm cm m km

Challenge

5. Which is larger? Circle your choice for each one.1 Pound or 100 Grams 1 Kilogram or 1 Pound

6. ___________ refers to the amount of matter in an object.

Volume

Exit Slip

What is the measurement for liquids?

What formula do you use to get density?

What is the prefix given to the unit that equals : kilogram centimeter millimeter