Page 6 - 新思维科学学生用书6 样章
P. 6
How to use this book
Questions to help you think How can you use what you have found out in this topic to look after
about how you learn. soil in the future?
Look what I can do!
I can find out different types of soils and know that they can be
This is what you have learnt classified based on their clay, sand and organic content.
I can find out different types of soil based on their composition and know
in the topic. that this can change, making it better or worse for plants to grow in.
I can make a prediction and see whether observation supports my prediction.
I can observe and sort different materials in soil.
I can record observations in a table.
At the end of the unit, Project: How people use soil
there is a project for you In this project you will identify a person who uses soil in your area and ask them
questions about how they use the soil.
You can do this project on your own or with a partner.
to carry out, using what Speak to a person in your area who uses soil.
You could speak to a farmer or someone with a garden or an allotment.
you have learnt. You might Make an appointment to speak to the person. Introduce yourself and
say why you want to speak to them.
make something or solve a Prepare a list of questions and leave space to write in the person’s answers.
Ask questions such as:
problem. • What sort of soil do you have? What is its colour and texture?
Is there any organic matter in the soil?
• Is it sandy, clay or loam?
• What do you grow in the soil?
• What do you need to add to the soil to make your plants grow well?
• How do you look after the soil?
If possible, take some photographs.
Remember to thank the person when you have finished.
Present the information you have collected on a poster.
Questions that cover what Check your progress
you have learnt in the unit. 1 The table shows the melting points of some Substance Melting point in °C
substances.
gold
1064
If you can answer these, you a What is a melting point? candle wax 60
b List the substances in order from
highest to lowest melting point. silver 962
are ready to move on to the c Describe a pattern you can see in the copper 1083
melting points. ice 0
next unit. d Does the melting point of a substance
change? Say why or why not. aluminium 660
2 a Why does food cook faster in the oven in a metal dish than in a glass dish?
b If you used a dish made of a different metal, would the cooking time change?
Explain why.
3 a Sort the following processes into two groups: reversible processes and
irreversible processes
rusting boiling freezing dissolving burning evaporating
b Add another process that you know of to each of the groups.
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