Home

Science

The periodic table and properties of materials

Physical and chemical properties

Physical and chemical properties

Videos

Summary

Exercises

Select Lesson

Magnetism

Types of magnets and magnetic fields
Electromagnets and solenoids

Space physics

Gravitational forces
Galaxies, stars and light years
Day, night and the four seasons

Matter

Physical changes of matter
Movement of particles: Brownian motion and diffusion

Electricity

Electrical circuits
Measuring current and potential difference
Resistance and Ohm's Law
Series and parallel circuits
Static electricity

Waves

Water waves and superposition
Sound waves
Hearing: the human ear and auditory ranges
The uses of sound waves
How light travels
Light transmission and ray diagrams
Detecting light: cameras and the human eye
Light frequencies, prisms and colour

Forces and motion

Motion and speed
Relative motion
Contact and non-contact forces
How friction affects movement
Force diagrams and resultant forces
Air and water resistance
Moments
Forces and elasticity: Hooke's Law
Pressure

Energy

Energy stores and transfers
Mechanical energy and work done
Energy transfer by heating
Energy calculations
Renewable and non-renewable energy
Energy in the home

Earth and atmosphere

The Earth: structure and properties
The rock cycle and weathering
Types of rock: Sedimentary, metamorphic and igneous
The carbon cycle
The atmosphere and carbon dioxide
Recycling and limited resources

Acids and alkalis

The pH scale and indicators
Neutralisation reactions
Reactions of acids with metals
Reactions of acids with oxides

Chemical reactions

An introduction to chemical reactions
Word and symbol equations
Combustion, oxidation and thermal decomposition
Displacement reactions
Exothermic and endothermic reactions and catalysts

Pure and impure substances

Pure substances and mixtures
Dissolving a mixture
Separating mixtures
Fractional distillation

The periodic table and properties of materials

The modern periodic table
Mendeleev's periodic table
Physical and chemical properties
Predicting reactivity using the periodic table
The properties of metals
The properties of non-metals
Ceramics, polymers and composites
The reactivity series and metal extraction

Atoms, elements and compounds

Dalton's atomic model
Atoms, elements and compounds
Naming chemical compounds

States of matter

Properties of the three states of matter
The particle model of matter
Gas pressure
Changes of state and conservation of mass
Heating and cooling curves

Genetics and evolution

DNA structure, discovery and inheritance
Types and sources of variation
The process of natural selection
Extinction and species preservation

Interactions and interdependencies

Ecosystems and interdependence
Food chains and poison
Food webs and interdependence

Plants

Photosynthesis and plant adaptations
Flower structure and pollination
Fertilisation, seed formation and dispersal
Investigating seed dispersal

Human reproduction

Human reproductive systems
The menstrual cycle
Human reproduction and gestation
Pregnancy and health

Human gas exchange systems

Structure and function of the human gas exchange system
The mechanism of breathing
Impact of exercise, asthma and smoking on gas exchange

Human nutrition, digestion and health

A healthy human diet
Energy requirements and diet imbalances
The structure of the human digestive system
Digestion and the importance of bacteria
The impact of recreational drugs on health

Human skeleton and muscles

The human skeletal system
Muscle function and antagonistic muscle pairs
Measuring the force exerted by muscles

Cells and respiration

How to observe cells under a microscope
Animal cells, plant cells, and unicellular organisms
Cell organisation and diffusion
Aerobic and anaerobic respiration

Explainer Video

Loading...
Tutor: Alisha

Summary

Physical and chemical properties

In a nutshell

All substances have a set of properties. Properties can be physical or chemical. 



Properties

A property is how a substance looks or behaves. It is important to be aware of a substance's properties as this can allow you to select the most appropriate material for the job.


Example

Aluminium is used to make saucepans as it is a very good conductor of heat.



Physical properties

A physical change is when a substance changes its physical state from solid, liquid or gas. The process occurring can usually be observed.  


Example 1

H2OH_2OH2​O​ going from liquid water to solid ice. 


Example 2

Other examples of physical properties are: brittleness, whether a material is magnetic or not and melting/boiling point. 



Chemical properties

A chemical change occurs during a chemical reaction. During the reaction, one or more new substances are formed. Chemical reactions cannot simply be observed just by looking at a material, you have to carry out a reaction or experiment.


Example

An example of measuring chemical properties is testing for pH of liquids.

Hydrochloric acid has a low pH between 0−20-20−2, which means it is acidic. Water has a ph of 777, this means it is neutral. Bleach on the other hand has a pH of 12−1312-1312−13​, therefore it is alkaline.

Science; The periodic table and properties of materials; KS3 Year 7; Physical and chemical properties


1.
Acidic pH - Hydrochloric acid
2.
Neutral pH - Water
3.
Alkaline pH - Bleach
Read more

Exercises

Easy

4 Exercises

Medium

4 Exercises

Hard

5 Exercises

Create an account to complete the exercises

Basics

Properties of the three states of matter
Properties of the three states of matter

Overview

Learning Goals

    Overview

    FAQs - Frequently Asked Questions

    What is a chemical property?

    A chemical property is when there is a chemical change during a chemical reaction.

    What is a physical property?

    A physical property is when a substance changes its physical state.

    What are the two types of properties all substances have?

    All substances have a set of properties. Properties are of two types: physical and chemical.

    ©2020 - 2024 evulpo AG

    Beta