Revision

Multiple Choice

What does each letter in the 'SEEE' scaffold stand for, and what is its purpose in constructing an answer?

• Statement, Explanation, Evidence, Explain Link; to structure detailed answers

• Summary, Example, Evidence, End; to summarize information

• Statement, Example, Evidence, End; to conclude answers

• Support, Explanation, Example, Evidence; to support arguments

Multiple Choice

Based on the modelled answer, what is the main reason Group B's method is more effective than Group A's when separating sand and saltwater?

• Because the filter removes both sand and salt together.

• Because dissolving the salt first ensures it passes through the filter as part of the filtrate, leaving sand behind.

• Because Group B uses more water.

• Because Group A's method is faster.

Multiple Choice

According to the modelled answer, why is air considered a mixture and not a pure substance?

• Because air is made up of different gases that are not chemically bonded and its composition can vary.

• Because air is always the same everywhere.

• Because air is a compound of oxygen and nitrogen only.

• Because air contains only one type of molecule.

Multiple Choice

Which piece of laboratory equipment is used for holding hot glassware or solid substances during heating?

• Tongs

• Retort Stand

• Tripod

• Bunsen Burner

Multiple Choice

Which piece of laboratory equipment is BEST used for measuring liquids

• Measuring cylinder

• Beaker

• Conical flask

• Bunsen Burner

Multiple Choice

What is the main purpose of a tripod in a laboratory setup?

• Supporting equipment over a Bunsen burner

• Holding test tubes

• Measuring liquids

• Heating substances directly

Multiple Select

Which of the following are characteristics of liquids according to the particle theory?

• Takes the shape of a container

• Particles slide past each other

• Difficult to compress

• Has a fixed shape

Open Ended

Compare the arrangement of particles in solids and liquids. How does this arrangement affect their properties?

Multiple Choice

At higher temperatures, particles move ______.

• Slower

• Faster

Multiple Select

Which of the following changes of state involve heat being added to a substance?

• Melting

• Freezing

• Evaporation

• Condensation

Multiple Select

Which of the following changes of state involve particles losing energy?

• Freezing

• Condensation

• Evaporation

• Sublimation

Open Ended

Explain what happens to the particles during the process of evaporation.

Multiple Select

Select all the correct characteristics of liquids from the following options.

• Particles move freely around each other

• Definite volume, no definite shape

• High energy

• Particles closely packed

Multiple Choice

Which type of matter is being described?

The particles are far apart in a random order.

The particles are free to move anywhere.

The forces between the particles are weak

• Solid

• Liquid

• Gas

Multiple Choice

Which of the following best describes a pure substance?

• A material made up of only one type of matter that cannot be physically separated into other substances.

• A mixture of two or more substances that can be separated physically.

• A substance that can be separated by chemical reactions.

• A material that always contains water.

Open Ended

Explain the difference between an element, a compound, and a mixture using examples.

Multiple Choice

Which statement correctly distinguishes between homogeneous and heterogeneous mixtures?

• Homogeneous mixtures have components spread evenly, while heterogeneous mixtures have components scattered unevenly.

• Homogeneous mixtures have components scattered unevenly, while heterogeneous mixtures have components spread evenly.

• Both types of mixtures have components spread evenly.

• Both types of mixtures have components scattered unevenly.

Multiple Choice

Which of the following is an example of a heterogeneous mixture?

• Salt water

• Coffee with milk

• Oil and water

• Air

Multiple Choice

Which type of mixture contains particles that completely dissolve?

• Solutions

• Suspensions

• Colloids

• Emulsions

Multiple Select

Which of the following statements about solutions are correct?

• A solution is always homogeneous throughout.

• A solution can be physically separated into its components.

• All solutions are made from liquids only.

• All portions of a solution have the same properties.

Open Ended

Why might it take longer for the sugar to dissolve in cold water? Think about how the particles are arranged in a liquid.

Open Ended

Describe the difference between a saturated and a supersaturated solution.

Multiple Select

Which of the following statements about density and separation are correct?

• Liquids with different densities will form layers.

• The denser liquid settles below the less dense liquid.

• Oil floats on water because it is denser than water.

• Density is a measure of how close together particles are.

Multiple Select

What factors influence separation?

• Density

• Boiling Point

• Solubility

• Particle Size

Multiple Choice

What is the process called when sediment sinks to the bottom of a container and the liquid is poured off?

• Filtration

• Evaporation

• Decanting

• Distillation

Open Ended

Explain how decantation separates a mixture of sand and water. What happens to each component during the process?

Multiple Choice

What is the main purpose of filtration ?

• To separate solids from liquids or gases

• To dissolve solids in liquids

• To mix different substances together

• To evaporate liquids

Open Ended

Explain the difference between decanting and filtration as separation techniques.

Multiple Choice

Which physical property does the evaporation separation technique rely on?

• Volatility

• Density

• Magnetism

• Particle size

Open Ended

Describe the process of paper chromatography and explain how it separates mixtures.

Multiple Select

Which of the following are advantages of the sieving method?

• It is cost-effective

• It can separate substances of identical size

• It is quicker than other methods

• It is easy to do

Multiple Select

Which of the following are disadvantages of sieving?

• No machinery needed

• Time consuming

• Costly (manual labour)

• Human error, mistakes due to fatigue

Open Ended

Describe a real-life situation where sieving would be the most effective separation technique and explain why.

Multiple Choice

In what situations is handpicking the most effective method for separating mixtures?

• When the unwanted material is dissolved

• When the unwanted material is big and easily accessible

• When the mixture is a liquid

• When the substances are the same size

Multiple Select

If you are given a solution of sand and water, what separation techniques CAN you use?

• Magnetic Separation

• Decantation

• Evaporation

• Filtration

Multiple Choice

If you are given a solution of iron and sand, what separation technique will you use?

• Magnetic Separation

• Decantation

• Evaporation

• Filtration

Multiple Choice

If you are given a solution of sugar water, what separation technique will you use?

• Magnetic Separation

• Decantation

• Evaporation

• Filtration

Multiple Choice

Which separation method involves manually picking out unwanted substances from a mixture based on differences in size, colour, or shape?

• Sieving

• Handpicking

• Filtration

• Evaporation

Open Ended

Explain how the physical properties of substances in mixtures, such as particle size, density, or volatility, determine the separation technique used.