CHAPTER ONE

LEARNING AREA:

Introduction to Science

LEARNING OBJECTIVES:

1.1 What is Science1.2 Science Laboratory1.3 The Steps in Scientific Investigation1.4 Physical Quantities and Their Units1.5 Measuring Tools1.6 The Concept of Mass1.7 The Importance of Standard Units in Everyday Life

Medical Agriculture Communication Domestic

1.1 Understanding that science is part of everyday life

1 Tick (/) in the column below to list down things that happen around us in nature.

a. A baby growing up

b. Formation of rainbow

c. A television set is turned off.

d. Sunrise

e. Raining

2. Label the pictures below according to the correct fields using the words

given.

a. _________________________ b. ______________________

c. ________________________ d. ______________________

3. Underline the correct answers below to name some of the careers in science.

A (doctor / biologist) treats patients while a (pharmacist / dentist) prepares

and prescribes drugs for medical purposes.

1.2 Understanding the steps in scientific investigation

1 Arrange the following steps in scientific investigation in the correct sequence using the phrases below.

Making hypothesis Writing a reportControlling variables Analysing and interpreting data

Identifying the problem

a)

Plan the experiment

b)

Collecting data

c)

Making conclusion

d)

.

1.3. Knowing physical quantities and their units

1. Draw lines to identify three other physical quantities in the word maze below.

W R T O Q W A T A TP R E E U B Z I S EO C Y A M I P M D ML E N G T H Q E F PW O D H W T E A G EQ P T G T M W R H RT U H R E F A S J AW O I U D Y E S K TR G O I E J R D S UU J P O Y K T K L RR Q V P U L Y J A E

2. Complete the table below to state the SI units and the corresponding symbols.

Physical quantity S.I unit Symbol

Length m

Mass kilogram

Time s

3. Complete the table below to show the symbols and numerical values for the following prefixes.

Prefix Symbol Numerical value of:

mega M 1 000 000

kilo k

centi 0.01

milli m

1.4 Understanding the use of measuring tools.

1. Measure the diameter of the ping pong ball in the diagram below in cm

2. Draw lines to match the correct measuring tools for measuring length, volume, and temperature.

3. The diagram below shows a regular shape A and an irregular shape B.Estimate the areas of A and B.

A: _________________ B: ___________________

Diameter = __________________ cm

Meter ruleTo measure temperature of substances

Thermometer To measure the volume of a liquid

Measuring cylinder To measure the length of a line

1cm 1cm

1cm 1cm

AB

Mass Weight

Quantity of matter a.

b. Spring balance

kilogram c.

Definition

Measuringtools

S.I unit

3. The diagram below shows an activity to determine the volume of a cork using water displacement method.

Calculate the volume of the cork.

1.5 Understanding the concept of mass

1. The diagram below shows two measuring tools.

Tick (/) the correct measuring tool that is used to determine the weight of an object. 2. Complete the statement below to explain the concept of weight.

The weight of an object is the pull of the earth’s ____________on an object.

3. Underline the correct answer to explain the concept of mass.

The mass of an object is the (quantity / quality) of matter in the object.

4. Compare and contrast between mass and weight in the diagram below.