OLH Year 7 End of topic test C1: substances and mixtures - Kieran Amery | Biblioteka

1

Which of the following is not a state of matter?

Solid

Gas

Evaporation

1

The state of matter of a substance depends on its...

Temperature

Size

Colour

1

How can you identify if a material is a pure substance?

If it has a range of boiling points.

If it has a fixed boiling point.

If it boils easily.

1

What is the melting point of a substance?

The temperature a substance boils or condenses at.

The temperature a substance melts or freezes at.

100 degrees.

1

What happens to the temperature while a pure substance is boiling.

It remains the same.

It gets steadily higher.

It begins to drop.

1

Most materials are...

Mixtures.

Pure substances.

liquids.

1

How can you identify if a material is a mixture of substances?

It has a fixed boiling point.

It will not evaporate.

It has a range of boiling points.

1

In a solution of salt and water what is the solvent?

The water

The salt

The mixture of salt and water together

1

In a solution of salt and water what is the solute?

The water

The salt

The mixture of salt and water together

1

What does aqueous (aq) mean?

Insoluble

Aquatic

Dissolved in water

1

The mass of a solution is equal to...

...the mass of the solvent + the mass of the solute

...the mass of the solvent - the mass of the solute

...the mass of the solvent by itself

1

What technique can be used to test if an ink is a pure substance or a mixture?

Filtration

Chromatography

Brownian motion

1

How can we identify the number of substances in an ink.

Count the number of colours in the solution.

Separate the colours using filtration

Count the number of spots on the chromatogram

1

In what state of matter are particles vibrating in fixed positions?

Solid

Liquid

Gas

1

In what state of matter are particles far apart?

Solid

Liquid

Gas

1

What temperature can a substance evaporate at?

100 degrees only.

At it's boiling point only.

At any temperature.

1

What do we call the "jiggling" movement of solid grains in a fluid?

Brownian motion

Particle model

Change of state.

1

What causes the "jiggling" movement of solid grains in a fluid?

The solid particles vibrating in a fixed position.

Particles in the fluid randomly colliding with the grains.

Particles in the fluid deliberately colliding with the grains.

1

What is a fluid?

A substance that can flow (liquid or gas)

A substance that can vibrate (solid)

A substance that can dissolve a solid.

1

Why can we not see particles of a substance under a microscope?

They are invisible

They move too quickly

They are too small.