Ch 7 Living things and air

7.1 What is air made up of

1. Perform tests for carbon dioxide, oxygen and water
2. Compare the composition of breathed and unbreathed air

7.2 Burning

1. Illustrate factors of burning
2. Be aware safety use of fire at home

7.3 How do we obtain energy

1. Point out energy conversion from food to human body
2. Compare energy content in different kinds of food through reading food labels

7.4 How do green plants obtain energy

1. Demonstrate production of starch and oxygen through experiments
2. Investigate different factors affecting photosynthesis

7.5 Gaseous exchange in animals and plants

1. Point out differences between gaseous exchange in plants and animals
2. Illustrate the breathing mechanism of human body by using models

7.6 Balance of carbon dioxide and oxygen in nature

1. Understand the carbon dioxide-oxygen balance in nature

7.7 Effects of polluted air and smoking on our breathing system

1. Be aware how air pollution and smoking affect our breathing system

Ch 8 Making use of electricity

8.1 Conditions of transferring electrical energy

1. Illustrate a source of electrical energy and a closed circuit are required for energy flow
2. Identify insulators and conductors

8.2 Current, Voltage and resistance

1. To measure current and voltage with ammeters and voltmeters respectively
2. To investigate the factors affecting the resistance in a conductor

8.3 Electric components

1. Draw circuit diagram for circuit
2. Set up simple circuit from circuit diagram

8.4 Electric circuits

1. Compare current in series and parallel circuits

8.5 Heating effect of current

1. Study the heating effect generated in circuit and their usages in daily life

8.6 Household electricity

1. Introduce socket, plug, ring circuit and wiring of electrical appliances
2. Emphasize safety uses of electricity at home

8.7 Electrical power

1. Understand the relationship among current, voltage and electrical power
2. Learn to calculate the cost of electricity consumed by appliance in circuit

8.8 Magnetic effect of current

1. Study the magnetic effect generated in circuit and their usages in daily life

Ch 9 Space travel

9.1 Force

1. Investigate the effects of forces on the motion of an object through experiment
2. Measure the forces by Newton balance

9.2 Friction

1. Discuss the advantages and disadvantages of friction in daily life examples
2. Discuss how to increase wanted friction and how to reduce unwanted friction

9.3 Force of gravity

1. Illustrate existence of gravity through experiments
2. Distinguish Mass and Weight

9.4 Space journey – launching

1. Illustrate the pair of action – reaction forces through experiments

9.5 Space journey – in space

1. Discuss how the designs of spacecraft overcome the problems (weightlessness, sources of energy, food and water, communication etc.) encountered
2. Discuss how spacecraft move under frictionless motion and gravity-free motion in space

9.6 Space journey – returning home

1. Discuss problems met when the spacecraft returns from space and the solutions

9.7 Space exploration

1. Study the effects of space exploration and space spin-offs

Ch 10 Common acids & alkalis

10.1 Acids & alkalis in daily life

1. Identify common acids and alkalis in daily life
2. Prepare natural acid-alkali indicators

10.2 Laboratory acids and alkalis

1. Find out the pH of common liquids by pH indicators
2. Compare different indicators

10.3 Importance of keeping the right pH

1. Identify the importance of maintaining proper pH levels of substances

10.4 The corrosive effect of acids

1. Test the hydrogen gas produced by acid corrosion on metals and calcium carbonate

10.5 Acid rain – the invisible threat

1. Identify the causes and effects and measures against of acid rain

10.6 Everyday uses of acids and alkalis

1. Point out daily usages of neutralization

10.7 Safety matters related to the use of acids and alkalis

1. Remind the safety precaution of handling acids and alkalis
2. Demonstrate the correct ways of diluting concentrated acids

Ch 11 Sensing the environment

11.1 Sensing the environment

1. To state the five senses and sense organs and the respective stimuli they detect

11.2 How do we see

1. Identify structure and functions of the main parts of an eye

11.3 Limitations of our eyes

1. Discuss the limitations of our eyes and tools that extend our vision

11.4 Eye defects

1. Identify the causes, effects and solution of eye defects (short-sighted, long-sighted, cataract, colour blindness)
2. Discuss preventative measures of eye defects

11.5 How do we hear

1. Identify structure and functions of main parts of ears assisted by model and video

11.6 Limitations of our ears

1. Find out the limitations of our audible range frequencies and loudness

11.7 Noise pollution

1. Identify the sources of noise pollution around school and home
2. Discuss measures of noise pollution control and protect our ears

11.8 Smell, taste and touch

1. Detect the flavor of food examples by the sense of smell and taste
2. Detect touch and temperature of objects on different parts of body

11.9 The brain and our senses

1. To illustrate the sensory and motor functions of the brain
2. To illustrate the false senses of vision through experiments

11.10 Alcohol, drugs, solvents and our senses

1. Point out chemicals could affect our judgments and responses
2. Discuss harmful effects of alcohol and drug abuse