Usborne What's Chemistry All About - Introduction

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Usborne What's Chemistry All About - Introduction

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Vijo Gor

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Usborne What's Chemistry All About - Introduction


Usborne What's Chemistry All About - IntroductionVersión en línea Usborne What's Chemistry All About - Introduction por Vijo Gor 1 What is chemistry mainly about? a Studying stars and planets b Studying substances and how they behave c Studying numbers and measurements only d Studying living organisms only 2 In chemistry, what does the word 'substance' mean? a Something that is always dangerous b Only materials made by humans c Only liquids used in laboratories d Any kind of 'stuff' things are made of 3 Which kinds of substances do chemists study? a Only substances found in space b Only everyday materials c Both everyday and dangerous substances d Only rare and deadly substances 4 Why might chemists wear gloves and goggles? a To look professional while working b To keep substances warm c To protect themselves from harm d To make experiments faster 5 Why can’t chemists rely only on labels to know what a substance is? a Chemists do not read labels b Substances always change color c Labels can be wrong or misleading d Labels are illegal in science 6 How do chemists find out what a mystery substance really is? a By asking questions and doing experiments b By waiting to see what happens c By tasting it carefully d By guessing from appearance 7 What does it mean when chemists talk about a substance’s 'properties'? a What the substance costs b What the substance is called c How the substance behaves and what it can do d Who first discovered the substance 8 Which of these is an example of a property of water? a It looks clear b It comes from rain c It boils at 100°C d It is used every day 9 Why might a chemist need to break a substance into parts? a To clean it properly b To destroy it safely c To make it heavier d To find out what it is made of 10 What is a mixture? a A substance that has reacted b A substance made of only one thing c Different substances combined together d Something that cannot be separated 11 What is a chemical reaction? a When substances are stored safely b When substances are measured carefully c When substances move from place to place d When substances turn into new substances 12 How do substances most often change in chemistry? a By being left alone over time b By being named correctly c By being heated or mixed with other substances d By being closely observed 13 Why do chemists do experiments? a To answer questions about substances b To follow rules without thinking c To repeat facts already known d To make substances look interesting 14 What does chemistry help humans do? a Replace all natural substances b Create useful materials and inventions c Only understand nature d Only build machines 15 Why do chemists say there is still a lot they don’t know? a Experiments no longer work b New substances and discoveries keep being found c Chemistry is too dangerous to continue d All substances are already understood

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Usborne What's Chemistry All About - IntroductionVersión en línea

por Vijo Gor

What is chemistry mainly about?

In chemistry, what does the word 'substance' mean?

Which kinds of substances do chemists study?

Why might chemists wear gloves and goggles?

Why can’t chemists rely only on labels to know what a substance is?

How do chemists find out what a mystery substance really is?

What does it mean when chemists talk about a substance’s 'properties'?

Which of these is an example of a property of water?

Why might a chemist need to break a substance into parts?

What is a mixture?

What is a chemical reaction?

How do substances most often change in chemistry?

Why do chemists do experiments?

What does chemistry help humans do?

Why do chemists say there is still a lot they don’t know?