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HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

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Unit 2: Properties of materials

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Unit 3: Forces and energy

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Unit 4: Maintaining life

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Unit 5: Reactivity

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Unit 6: Sound and space

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Unit 7: Genes and inheritance

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Unit 8: Rates of reaction

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Unit 9: Electricity

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Quiz

Constructing keys – Quiz

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Constructing keys HIA Science quiz set 2: free practice for HIA International. Work through this Constructing keys HIA Science quiz set 2 and get instant feedback on every answer. If you get stuck, review the 22.5 Constructing keys – Notes lesson. More practice: HIA International — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: A-
  • Time limit:
Start Quiz
1.
Use the table of features. Which feature would NOT help to split these four animals?
Has scales
Has feathers
Has a backbone
Has fur
2.
Use the table. Which object shows all the life processes and is therefore living?
Object 3
Object 1
Object 2
Object 4
3.
Look at the four drawn animals. Which yes/no question splits them into two groups of two?
Dr Dabour Hub Academy - figure 1
Is it brown?
Does it have wings?
Is it an animal?
Does it have exactly 6 legs?
4.
Using the four drawn animals, which single question would separate the only winged animal from the rest?
Dr Dabour Hub Academy - figure 2
Does it have antennae?
Is it brown?
Does it have legs?
Does it have wings?
5.
A student tested their key on 8 organisms. Using the table, what should the student do next?
Replace all questions with colours
Add a question that separates the two organisms that reached the same end point
Delete two organisms from the list
Stop, the key works
6.
Which statement correctly describes revision?
improving a key after testing has shown a problem
a key drawn as a tree that divides in two at each point
the two alternative statements written at each numbered step
a first question that divides the organisms into two groups of similar size
7.
Which statement correctly describes trial?
improving a key after testing has shown a problem
the two alternative statements written at each numbered step
testing a completed key on the organisms it was built for
designing a key that separates a set of organisms one by one
8.
Which statement correctly describes branching diagram?
improving a key after testing has shown a problem
testing a completed key on the organisms it was built for
a key drawn as a tree that divides in two at each point
designing a key that separates a set of organisms one by one
9.
Which statement correctly describes balanced split?
a key drawn as a tree that divides in two at each point
a first question that divides the organisms into two groups of similar size
the two alternative statements written at each numbered step
testing a completed key on the organisms it was built for
10.
Which statement correctly describes numbered pair?
testing a completed key on the organisms it was built for
the two alternative statements written at each numbered step
a first question that divides the organisms into two groups of similar size
a key drawn as a tree that divides in two at each point
11.
Use the table. Which question is the best choice for a key?
Does it have a shell?
Is it brown?
Is it pretty?
Is it big?
12.
After splitting the animals into A and C (6 legs) and B and D (not 6 legs), which question separates A from C?
Dr Dabour Hub Academy - figure 3
Is it small?
Does it have antennae?
Does it have wings?
Does it have 6 legs?
13.
A student has five leaves to identify and wants a key that always works. Which approach is best?
Ask about colour only
Write two-choice questions about visible, measurable features and test the key on every leaf
Use three choices at every step
Use questions about how pretty each leaf is
14.
Which statement correctly describes key construction?
testing a completed key on the organisms it was built for
a first question that divides the organisms into two groups of similar size
designing a key that separates a set of organisms one by one
improving a key after testing has shown a problem
15.
Match the term to its correct meaning: balanced split
designing a key that separates a set of organisms one by one
a first question that divides the organisms into two groups of similar size
the two alternative statements written at each numbered step
improving a key after testing has shown a problem
16.
Match the term to its correct meaning: trial
a key drawn as a tree that divides in two at each point
testing a completed key on the organisms it was built for
designing a key that separates a set of organisms one by one
the two alternative statements written at each numbered step
17.
Match the term to its correct meaning: key construction
designing a key that separates a set of organisms one by one
the two alternative statements written at each numbered step
testing a completed key on the organisms it was built for
a key drawn as a tree that divides in two at each point
18.
Which term is described as: a key drawn as a tree that divides in two at each point?
branching diagram
balanced split
numbered pair
key construction
19.
Match the term to its correct meaning: branching diagram
testing a completed key on the organisms it was built for
a key drawn as a tree that divides in two at each point
designing a key that separates a set of organisms one by one
the two alternative statements written at each numbered step
20.
Which term is described as: a first question that divides the organisms into two groups of similar size?
balanced split
numbered pair
key construction
trial
21.
Match the term to its correct meaning: numbered pair
a first question that divides the organisms into two groups of similar size
designing a key that separates a set of organisms one by one
improving a key after testing has shown a problem
the two alternative statements written at each numbered step
22.
Which term is described as: testing a completed key on the organisms it was built for?
branching diagram
trial
balanced split
key construction
23.
Which term is described as: the two alternative statements written at each numbered step?
branching diagram
key construction
numbered pair
trial
24.
Which term is described as: improving a key after testing has shown a problem?
branching diagram
numbered pair
revision
key construction
25.
Match the term to its correct meaning: revision
a first question that divides the organisms into two groups of similar size
testing a completed key on the organisms it was built for
designing a key that separates a set of organisms one by one
improving a key after testing has shown a problem
26.
Which term is described as: designing a key that separates a set of organisms one by one?
key construction
branching diagram
numbered pair
balanced split
27.
A key for eight organisms needs _____ steps.
eight
nine
seven
four
28.
A key is complete when every organism is _____ from the others.
counted
grouped
separated
renamed
29.
A good first question makes a _____ split.
single
final
random
balanced
30.
A key drawn as a tree is a _____ diagram.
numbered
linear
circular
branching
31.
Two alternative statements at a step form a numbered _____.
list
route
pair
group
32.
A key for eight organisms needs eight steps. - True or false?
True
False
33.
A key never needs testing once it is written. - True or false?
True
False
34.
Features that only an expert can observe make the best key questions. - True or false?
True
False
35.
A key is complete when every organism has been separated from all the others. - True or false?
True
False
36.
The key shown uses three branches and vague words, so it should be rewritten with two measurable choices at each step. True or false?
Dr Dabour Hub Academy - figure 4
False, three branches are best
False, vague words are always fine
False
True
37.
A numbered key writes two alternative statements at each step. - True or false?
True
False
38.
A key should be tested on the organisms it was built for. - True or false?
True
False
39.
A branching key is drawn as a single straight line. - True or false?
True
False
40.
A good first question splits the organisms into two groups of similar size. - True or false?
True
False
41.
Features that are easy for anyone to observe make the best key questions. - True or false?
True
False
42.
Each step should use a feature shared by every organism. - True or false?
True
False
43.
A key for eight organisms needs seven steps. - True or false?
True
False
44.
A good first question always separates one organism from all the others. - True or false?
True
False
45.
A key is complete as soon as the first question has been written. - True or false?
True
False
46.
Two people can build different keys for the same organisms and both be correct. - True or false?
True
False
47.
A branching key is drawn as a tree that divides in two at each point. - True or false?
True
False
48.
If a test shows a problem, the key should be revised. - True or false?
True
False
49.
There is only one correct key for any set of organisms. - True or false?
True
False
50.
If a test shows a problem, the organism should be discarded. - True or false?
True
False
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Part of Unit 4: Maintaining life — see every lesson and quiz in this unit.
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