Science 24 Ch 1 & 2

Which of the following is a chemical substance used by farmers to remove unwanted plants?

• herbicide

• insecticide

• pesticide

• fungicide

When two or metals are mixed together it is called a/an

• plated metal

• alloy

• mechanical mixture

• colloid

Natural fibers such as cotton, wool, silk, or flax are long chains of molecules chemically bonded together. What is the term for the individual molecules that come together to form the chains?

• polymers

• starch

• monomers

• polysaccharides

Synthetic fibers such as nylon, Gore-tex, Kevlar, and polyester are long chains of molecules chemically bonded together. What is the term for such long chains of molecules?

• ethylenes

• starches

• monomers

• polymers

Safety symbols ensure people are aware of what the dangers are that they are working with. What does WHMIS stand for?

• Workplace Hazardous Materials Information System

• Workplace Hazardous Materials Improvisation Symbols

• Workplace Hazardous Materials Information Symbols

• Working Hard May Improve Society

Which of the following symbols means FLAMMABLE substance?

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Which of the following symbols means CORROSIVE substance?

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Which of the following symbols means EXPLOSIVE substance?

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True or False. Yeast causes the creation of oxygen in dough making it rise.

• True

• FALSE

Safety Data Sheets (SDS) have the most in-depth information about chemicals at a work-site. How many sections are there on each SDS sheet?