I. Lead –in

Study the cartoon and answer the questions.

Who are these people? What do you know about Bunsen? Can you name any other equipment invented by Bunsen? Which equipment do you have in your laboratory?

b. Look at the pictures and match the laboratory equipment with their names: a) goggles, b) lab stand, c)funnel, d)graduated cylinder, e)lab coat, f)test tube, g)Bunsen burner, h)tongs, i)triple beam balance, j)eye dropper, k)Erlenmeyer flask, l) striker, m) beaker

c. What these items might be used for? Match the items with their functions:

A.		B.		C.		D.			E.
F.	G.		H.		I.		J.	K.

Object name	Used for
1	Used to pick up hot or cold objects
2	Protect the eyes from flying objects or chemical splashes
3	A wide mouthed container used to transport, heat or store substances
4	A small glass container used to view chemical reactions or to store small amounts of a substance
5	A device to measure mass of an object or substance
6	Protects the scientist and scientist’s clothes from hazardous or hot chemicals
7	Used to dispense a very small amount of a liquid
8	Used to light a Bunsen buner
9	Used to measure volume very precisely
10	Used to hold a variety of lab equipment
11	Used to heat objects
12	A narrow mouthed container used to transport, heat or store substances, often used when a stoper is required
13	Used to pour liquids into containers with small openings or to hold filter paper

II. Reading

a. Read the text and translate it.

Basic Laboratory Instruments

Laboratories can be equipped with a wide set of instruments depending on the work that is done in them. These can include everything from simple containers to advanced lasers. Nearly all laboratories however include the same basic supplies which are used across the different scientific disciplines, from microbiology to physics.

Microscopes

Microscopes are important tools that enable scientists to perform research on small objects, some of which cannot be detected by the naked eye. There are some different types of microscopes. Compound microscopes are the most common and offer a two-dimensional image with low resolution. However, it has a high magnification level that can allow users to view individual cells. Stereoscopic microscopes on the other hand have a low magnification level, offer a three-dimensional image and are often used for viewing large specimens up close for dissection. More advanced microscopes include electron microscopes which offer excellent magnification and resolution.

Glassware

Glassware is common in most labs, especially those that perform work related to chemistry. Various types of glassware are mainly composed of borosilicate glass which can stand up to heat and chemical reactions best. Beakers are used for mixing, measuring and boiling liquids. Graduated cylinders are used for accurate measures of small amounts of liquid. Test tubes which come in various sizes are used for long-term storage and come with stoppers to prevent contamination of whatever they contain.

Heating Instruments

There are two basic heating instruments that can be found in most laboratories. Bunsen burners are cylindrical metal tubes connected to a flat base and a rubber tube that delivers a mixture of air and gas to create a flame at the top end of the cylinder. Beakers and other containers can be clamped above the flame to heat their contents. The flame can be controlled by a knob that alters the flow of the air and gas mixture. Hotplates are alternatives to Bunsen burners. They are heated with electricity and have the option to control temperature. Some hot plates are equipped with stirrers that enable better dissolving of solids into a liquid.

b. Match the words in bold in the text with their Russian equivalents: выдержать, образeц, научный, пробка, невооруженный глаз, мешалка, набор инструментов, объемное изображение, загрязнение.

c. Choose the correct word/words in italics:

1. Graduated cylinders are used for accurate / inaccurate measures of small amounts of liquid.

2. The flame can be controlled by a knob that changes /alters / does the flow of the air and gas mixture.

3. Advanced microscopes include electron microscopes which offer excellent / poor /terrible magnification and resolution.

4. Laboratories can be equipped with a narrow /wide set of instruments depending on the work that is done in them.

5. Microscopes are designed to help scientists to view small objects that cannot be detected by the naked eye /by glass.

6. Microscopes are important tools that enable scientists to conduct / make research on small objects.

d. Fill in the gaps with the prepositions:

1. All laboratories include the same basic supplies which are used … the different scientific disciplines, from microbiology to physics.

2. Compound microscopes are the most common and offer a two-dimensional image … low resolution.

3. Microscopes are important tools that enable scientists to perform research … small objects, some of which cannot be detected … the naked eye.

4. Various types of glassware are mainly composed … borosilicate glass.

5. Test tubes which come … various sizes are used for long-term storage and come with stoppers.

6. Hotplates are heated … electricity and have the option to control temperature

e. Find 17 words connected with laboratory instruments and equipment.

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