Physics and Chemistry - Unit 1

(a)   studies changes in matter that don't affect its nature.

Say which of the following is studied in PHYSICS

• Lighting a candle

• Heating up water

• Digesting a cheese sandwich

• Baking a cake

Answer explanation

Heating up water can turn into steam, and cooling it can turn it into ice. Either way, the substance, water, remains the same.

CHEMISTRY studies the (a)   of matter and changes that affect its nature.

Say which of the following is studied in CHEMISTRY

• Shredding paper

• Melting ice

• Chopping wood

• Rutting banana

Answer explanation

When a banana rotts its composition and properties change.

Mass, volume and temperature are SPECIFIC properties of a matter.

• True

• False

Answer explanation

Mass, volume and temperature are GENERAL properties of a matter.

Their value is not specific. We cannot use them to identify different types of matter.

Density is

• GENERAL property

• SPECIFIC property

Answer explanation

Specific properties of matter depend on the type of matter rather than the amount of matter that we have. Their value is specific for each type of matter.

Examples:

Density, hardness, solubility and electrical conductivity.

What is the first step of the scientific method?

• Experimentation

• The hypothesis

• Observation

• Analysing the results

A hypothesis is a guess about a real event.

• True

• False

What do we use to analyze the results?

• Tables and graphs

• Senses

• Predictions

Scientific publications must include the following elements:

• Title and introduction

• Methodology

• Results

• Conclusion

• All of the them

Answer explanation

Scientific publications must include the following elements:

1. Title

2. Introduction

3. Methodology

4. Results

5. Analysis of the results

6. Summary and conclusion

7. Bibliography