Page 4 - 新思维科学活动用书7 样章

How to use this book
How to use this book
This workbook provides questions for
you to practise what you have learned
in class. There is a topic to match each
topic in your Learner’s Book. Each topic
contains the following sections:
Focus: these questions help you to
master the basics
Indian rhinoceros
Practice: these questions help you to
become more confident in using what
you have learned
Challenge: these questions will make
you think very hard
84
04-SJ00079347 新思维科学 活动用书7-c04（p74-92）-4校_FX.indd
4.3 What is a species?
Focus
This exercise will help you to check that you understand what the term ‘species’ means.
Complete the sentences on the next page.
Choose from these words or phrases.
You can use each word or phrase once, more than once or not at all.
horn horns exactly the same as fight fertile healthy
different to
species
infertile
reproduce
kingdoms
The drawings show an Indian rhinoceros and a white rhinoceros.
Indian rhinoceros white rhinoceros
white rhinoceros 4.2 Viruses
Practice
White rhinoceroses and Indian rhinoceroses belong to different .
2 Scientists do not all agree about whether viruses are living organisms.
This means that they cannot with each other to produce
I do not agree
Viruses are living that viruses should
offspring.
organisms. be classed as living
organisms.
81
A B
4 Grouping and identifying organisms
a Write down one piece of information about viruses that supports the view of Scientist A.
Exercise 4.3C A new frog species
Challenge
b Write down two pieces of information about viruses that support the view of Scientist B.
In this task, you will use your
understanding of what makes a
separate species. You will suggest how
scientists could decide how to classify
a newly discovered kind of frog.
In 2016, a team of researchers from
Challenge
India and the National University of
3 Viruses were first discovered in 1892.
Singapore discovered an unusual frog
in a rocky habitat near the coast
Use the internet to find out how this discovery happened.
of southwest India.
a Which websites did you use? Explain why you decided that these websites provided reliable
The frog is tiny – only about 16 mm
information, and were not biased or scientifically incorrect.
long. It looks similar to other little
frogs that are classified in the genus
Microhyla. This frog is pale brown and has black and orangey-red markings on its back, feet and 79
sides. The males make a call that sounds like a cricket chirping.
The researchers thought that the frog looked different from the eight species of Microhyla known to
live in India. They thought it might be a new species, not known about before.
Suggest what the researchers should do to decide whether or not their frog really is a new species.
You could think about these things.
• How many specimens of the new frog should they collect? (Think about how much evidence 3
they need, as well as the fact that this species might be rare.)
• What evidence should the researchers collect in order to test the hypothesis that the new frog
belongs to a new species?
• How should the researchers use this evidence to make a decision about whether or not the frog
belongs to a new species?
• How might other scientists evaluate the evidence of these researchers, and continue the research
to obtain more evidence?
84 2022/7/26 15:21:46