WorksheetsScience 24: Chapters 1 and 2
Total questions: 24
Worksheet time: 14mins
Malathion is a chemical used to kill insects that are eating the leaves on a fruit tree. Malathion is an example of a:
herbicide
synthetic fertilizer
pesticide
plastic polymer
The synthetic chemicals in agricultural fertilizer have reduced the amount of work farmers have to do. What is the purpose of these human-made chemicals?
to kill insect pests
to kill harmful weeds
to protect farmers from biting insects
to help grow bigger and healthier plants
Which substance was used in making soap 100 years ago?
animal fat
coconut oil
canola oil
water
An example of a natural fibre is
polyester
cotton
Kevlar
nylon
Which synthetic fibre is used to produce waterproof and windproof clothing?
cotton
canvas
Kevlar
Gore-Tex
A molecule that is made up of many small, identical sub-molecules is a(n)
alloy
polymer
synthetic fibre
polyster
Which alloy is mostly used to make kitchen utensils?
brass
iron
stainless steel
superplastic steel
Which is an example of a natural polymer?
neoprene
polystyrene
spider web
polyethylene
A material that is human-made is called?
Synthetic
Fake
Alloy
Silk
Which of the following jobs requires an understanding of Chemistry?
Mechanic
Cosmetologist
Construction Worker
All the Above
What ingredient is added to bread so that it will not cook FLAT, this makes bread 'rise'?
baking soda
yeast
sugar
cinnamon
Which of the following is always true about any chemical reaction?
there is a change of state
a new substance is produced
no new substances are formed
heat is produced
Which of the follow is NOT an example of a chemical reaction?
Using baking soda and vinegar to make a toy volcano
Rusting of a metal
Burning of firewood
Ice melting
Use the following reaction to answer the question.
Fuel + oxygen ---> carbon dioxide + water + energy
It releases energy and is endothermic
It absorbs energy and is endothermic
It releases energy and is exothermic
It absorbs energy and is exothermic
When you have an upset stomach you will sometimes take an antacid. The antacid contains magnesium hydroxide which reacts with your stomach acid to produce water and salt. What type of reaction is this?
combustion
neutralization
energy
decomposition
Use the following reaction to answer the question.
Acid + Base --> Water + Salt.
The water and the salt would be classified as what?
Products
Energy
Waste Material
Reactants
What two reactants are present in a Combustion Reaction?
Carbon Dioxide and Water
Water and Fuel
Energy and Carbon Dioxide
Fuel and Oxygen
Select ALL that are correct!! (You may select MORE THAN ONE answer)
Which of the following is evidence that a chemical reaction has occurred?
change in colour
temperature change
a precipitate formed
a new smell
Select ALL that are correct!! (You may select MORE than ONE answer... then submit)
What are the Products of a Combustion Reaction?
Energy
Oxygen
Carbon Dioxide
Water
Which statement(s) is(are) true of photosynthesis?
energy is absorbed
energy is produced
glucose and oxygen are produced
water and carbon dioxide are produced
What is the name of the test for oxygen gas?
The "pop" test
The lime-water test
The glowing splint test
Which of the following is an example of a metal alloy?
Brass
Copper
Zinc
Gold
