WorksheetsBeckham's Science Feb. Test
Total questions: 45
Worksheet time: 28mins
Definition: A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, revealing the substance’s ability to form new substances.
Acid
hypothesis
What is a chemical property?
A characteristic that can only be observed when a substance undergoes a chemical reaction.
A characteristic that describes the color of a substance.
A property that changes only the size of an object.
A property that can be observed without changing the substance's identity.
Which of the following is NOT a chemical property?
Flammability
Reactivity with acid
Melting point
Ability to rust
What is a physical property?
A characteristic observed during a chemical reaction.
A property that changes the composition of a substance.
A property observed without changing the identity of a substance.
A property related to the flammability of a substance.
Which of the following is an example of a physical property?
Reactivity with oxygen
Ability to burn
Density
Reactivity with water
Is the ability to dissolve a chemical or physical property?
Chemical property
Physical property
Both chemical and physical properties
Neither chemical nor physical properties
Does a chemical reaction change physical properties, chemical properties, or both?
Physical properties only
Chemical properties only
Both physical and chemical properties
Neither physical nor chemical properties
What is a monomer?
A large molecule made of repeating units.
A small molecule that binds to other molecules to form polymers.
A type of natural material.
A chemical property of synthetic materials.
What is a polymer?
A small molecule that forms natural materials.
A large molecule made of repeating monomer units.
A chemical reaction in natural materials.
A molecule that cannot be synthesized artificially.
How can polymers be made stronger?
By heating them.
By increasing cross-linking between polymer chains.
By adding water molecules.
By reducing the number of monomers.
What can be added to make polymers more flexible?
Cross-linkers
Adhesives
Reinforcing fibers
Plasticizers
Which of the following is NOT an example of a polymer used daily?
Plastic bottles
Rubber bands
Wooden chairs
Nylon clothing
What is the main difference between natural and synthetic materials?
Natural materials are always stronger than synthetic materials.
Natural materials are derived from plants or animals, while synthetic materials are man-made.
Natural materials are chemically modified, while synthetic materials are pure.
Natural materials are only used in clothing.
Which of the following is NOT a natural material?
Polyester
Cotton
Wool
Natural rubber
Which of the following is NOT a synthetic material?
Nylon
Silk
Polyester
Polyethylene
Which of the following is a reason to use natural products instead of synthetic?
They are more durable.
`They are biodegradable.
They are less expensive.
They are resistant to damage.
Which of the following is NOT an advantage of synthetic materials?
Durable
Lightweight
Environmentally friendly
Cost-effective
Which is NOT an advantage of plastics?
Lightweight
Water-resistant
Biodegradable
Versatile in design
Name 3 physical properties
Color
density
melting point
rust
What does the Law of Conservation of Mass state?
Mass can be created but not destroyed during a reaction.
Mass can be destroyed but not created during a reaction.
Mass is neither created nor destroyed during a chemical reaction.
Mass only changes during physical reactions.
How can you verify if a reaction follows the Law of Conservation of Mass?
By checking if the products weigh less than the reactants.
By ensuring the number and type of particles are the same on both sides of the reaction
By looking for changes in the color of the reactants.
By counting the molecules in the products only.
If 40 g of FeSO₄ reacts to form 20 g of CaSO₄ and 30 g of Fe, how much Ca is required?
10 g
20 g
30 g
If the total mass of the reactants is 50 g, what is the total mass of the products?
40 g
50 g
60 g
70 g
What is the correct balanced equation for the reaction of hydrogen gas and oxygen gas to form water?
H₂ + O₂ → H₂O
H₂ + O₂ → 2H₂O
2H₂ + 2O₂ → H₂O
2H₂ + O₂ → 2H₂O
What are the products of the reaction between methane (CH₄) and oxygen (O₂)?
Carbon monoxide and water
Carbon dioxide and oxygen
Carbon dioxide and water
Methane and water
Which of the following is NOT an advantage of a down sleeping bag?
Light and compressible
Excellent weight-to-warmth ratio
Durable over 10 years
Insulates when wet
Which property is unique to polyester sleeping bags compared to down?
More expensive
Non-allergenic
Better weight-to-warmth ratio
Loses insulation when wet
Which of the following is a disadvantage of polyester sleeping bags?
Doesn’t compress as easily as down
Heavier for the same warmth level
Both A and B
None of the above
Which fabric is ideal for summer clothing due to its breathability?
Polyester
Cotton
Wool
Nylon
Which fabric is best for insulation during winter?
Cotton
Silk
Wool
Polyester
If a reaction results in 30 g of product and started with 20 g of one reactant, how much of the other reactant was required?
10 g
20 g
30 g
40 g
A chemical property is a characteristic of a substance that can only be observed during a __________ reaction.
chemical
acid
water
Plastic is a widely used synthetic polymer because it is lightweight, (a) -resistant, and versatile in design.
Natural polymers like cotton and wool are derived from __________, whereas synthetic polymers like polyester and nylon are man-made.
rocks or minerals
Adding __________ to a polymer can make it more flexible by reducing intermolecular forces.
acid
chemicals
Polymers can be made stronger by increasing (a) between polymer chains.
A monomer is a small (a) that binds with others to form a polymer.
The ability to dissolve is classified as a (a) property because the substance’s identity does not change.
Examples of physical properties include color, density, and (a) point.
A physical property can be observed or measured without changing the (a) of the substance.
Examples of chemical properties include flammability, reactivity with (a) , and ability to rust.
A chemical property is a characteristic of a substance that can only be observed during a (a) reaction.
The products of the reaction between methane (CH₄) and oxygen (O₂) are carbon dioxide (CO₂) and (a) .
Natural materials like wool have a better (a) to warmth ratio compared to synthetic materials.
The total mass of the (a) must equal the total mass of the products in a chemical reaction, according to the Law of Conservation of Mass.
