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Checkpoint Biology 0893

Grade 6 - Unit 1: Cells and organisms

0/11 Dr Dabour Hub Science Diagram and Course Material

Grade 6 - Unit 4: Living organisms and classification

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 6 - Unit 7: Microorganisms and food webs

0/11 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 1: Breathing and respiration

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 4: Ecosystems

0/10 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 7: Nutrition, health and movement

0/10 Dr Dabour Hub Science Diagram and Course Material

Grade 8 - Unit 1: Cells and organisms

0/10 Dr Dabour Hub Science Diagram and Course Material

Grade 8 - Unit 4: Living organisms and classification

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 8 - Unit 7: Microorganisms and food webs

0/10 Dr Dabour Hub Science Diagram and Course Material
Quiz

Checkpoint Grade 8 Unit 4 – 4.4 Using Keys

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Using Keys Checkpoint Biology quiz set 2: free practice for Cambridge Checkpoint Biology 0893. Work through this Using Keys Checkpoint Biology quiz set 2 and get instant feedback on every answer. If you get stuck, review the 8.4 Using keys lesson. More practice: Cambridge Checkpoint Biology 0893 — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: B+
  • Time limit:
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1.
Which statement correctly describes branching key?
a key that gives two choices at each step
an individual living thing
an identification route displayed as branches
a structured set of choices used to name an organism
2.
Which statement correctly describes dichotomous key?
an identification route displayed as branches
an individual living thing
a key that gives two choices at each step
a structured set of choices used to name an organism
3.
Which statement correctly describes identification key?
an identification route displayed as branches
a key that gives two choices at each step
an individual living thing
a structured set of choices used to name an organism
4.
Which statement correctly describes organism?
an identification route displayed as branches
a key that gives two choices at each step
a structured set of choices used to name an organism
an individual living thing
5.
Which of these is the FIRST step in the correct order?
choose one of two statements
follow the indicated branch
reach an identification
observe the organism
6.
Which step comes immediately after "choose one of two statements"?
observe the organism
reach an identification
follow the indicated branch
7.
Which practical work belongs to Using Keys?
Use evidence to discuss why viruses sit at the boundary between living and non-living
Use reproductive evidence and observable features to compare organisms
Apply the seven characteristics to living, non-living and once-living examples
Follow paired-choice questions accurately and check identification against observable features
8.
A great crested newt has moist skin with no scales, no fur or feathers, and breathes air with lungs as an adult. Using the key, which name does it reach, and after how many questions?
Dr Dabour Hub Science Diagram and Course Material
Reptile, after three questions
Amphibian, after four questions
Fish, after four questions
Amphibian, after three questions
9.
Tom drew four single-celled organisms, W to Z, seen with a microscope. Using the numbered key, which route and name does he get for organism X?
Dr Dabour Hub Science Diagram and Course Material
1b, 2a, 3a – Euglena
1b, 2a, 3b – Chlamydomonas
1a – Paramecium
1b, 2b – Amoeba
10.
Kai is writing a key to the four fruits shown. Which question would separate fruit A from fruit B?
Dr Dabour Hub Science Diagram and Course Material
Is it spread by the wind?
Does it contain a seed?
Is it very light in weight?
Does it have a tuft of fine hairs?
11.
Jin finds a fungus with a cap on a stem. Under the cap there are no gills, but there are sponge-like pores. Using the key, what is it?
Dr Dabour Hub Science Diagram and Course Material
It is a chanterelle
It is a field mushroom
It is a penny bun
It is a puffball
12.
Two keys were designed for the same organisms in different ways. Using the graph, which is the best advice for someone writing a key for 30 kinds of beetle?
Dr Dabour Hub Science Diagram and Course Material
Choose features that split each group roughly in half
Make each question remove one beetle, as that is simplest
Both designs need the same number of questions, so either will do
Use fewer organisms, because keys cannot work for 30 kinds
13.
Ben's specimen was a tortoise, but he reached the name "lizard". His answers are shown under the key. Where did he go wrong?
Dr Dabour Hub Science Diagram and Course Material
At "Does it have legs?", where he chose Yes
At "Does it have a hard shell?", where he chose No
At the snout question, where he chose No
Nowhere – tortoises are a type of lizard
14.
Hana wants the first question of her key to split the four fish A to D into two groups of two. Using the drawings, which question does this?
Dr Dabour Hub Science Diagram and Course Material
Is its body flat like a kite?
Does its tail curl round?
Does it have a gill cover?
Does it live in the sea?
15.
A zoo uses this key. It now adds a koala, which has a pouch but no long thick tail, unlike a kangaroo. Which change keeps the key working?
Add koala as a third name at 3a, next to kangaroo
Replace step 1 with "Does it live in Australia?"
Leave the key as it is, because the koala will reach the name gorilla
Send 3a to a new step that asks about a long thick tail
16.
Two groups of 16 students each identified the same 8 specimens, one group using a branching key and the other a numbered key for the same organisms. Which conclusion is best supported?
Equally accurate, but the branching key was quicker
The numbered key was more accurate because students spent longer on it
The branching key was far more accurate than the numbered key
Numbered keys are always better when there are many organisms
17.
Mo tries this numbered key on a bee, which has six legs and wings. What is the main problem with the key?
The key has too few steps for five different animals
A bee fits both 1a and 1b, as the two statements overlap
Step 2 uses wings, which cannot be seen on a bee
Step 3 should come before step 1 in the key
18.
Amani is writing a key to six plants and wants the first question to split them into two groups of three. Using her table, which question should she use?
Does it produce seeds?
Does it have roots?
Does it produce cones?
Does it produce flowers?
19.
Jo tested her new key on five insects whose names were already known. Step 2 asks "Does it have long antennae?". Which conclusion about her key is best?
Step 3 needs rewriting, as it gave the beetle a wrong name
Step 1 must be wrong, as every specimen passed through it
Step 2 needs rewriting, as "long" is not clear enough to judge
Step 4 needs rewriting, as the ant and earwig were confused
20.
A key is needed for a bat, a sparrow, a goldfish and a frog. Which first question splits them into two equal groups?
Does it have wings?
Does it have feathers?
Does it have a backbone?
Does it lay eggs?
21.
In a correct key to six fish, Leo reaches "carp" after 2 questions but Ana needs 5 questions to reach "pike". What is the best explanation?
Ana must have made an error, as every route has the same length
The key splits groups unequally, so some names are reached sooner
Leo skipped some questions, which is allowed if he was sure
Pike are larger fish, so the key needs more questions for them
22.
Which is the best replacement for the key question "Does it have a long tail?"
Does it have a very long tail?
Does it have an attractive tail?
Is its tail longer than its body?
Is its tail long for an animal?
23.
A key uses only two questions: "Does it have legs?" and "Does it have wings?". Which set of animals could this key NOT separate?
A snake, a sparrow and a mouse
An earthworm and a beetle
A spider and a moth
A housefly and a wasp
24.
Ms Lee wants to find out whether a branching key or a numbered key is quicker for her class to use. Which plan is the fairest test?
Make both layouts of one key and time similar groups on the same specimens
Time Group 1 using a branching key on beetles and Group 2 a numbered key on fish
Let only the fastest students try the numbered key, then time them
Let each student choose which key to use and how many specimens to do
25.
For which task would a branching key be most suitable?
Fitting hundreds of species into a small printed book
Identifying a few organisms quickly by following lines
Offering many choices at each step, like a picture key
Naming organisms without looking at any of their features
26.
Aisha's key names a wild mushroom as "field mushroom", a type that people eat. What should she do?
Eat a small piece first to test whether it is safe
Cook it well, because cooking makes all fungi safe
Trust the key, because keys cannot give a wrong name
Not eat it: one wrong choice could give a wrong name
27.
Each option links a type of key to what it is best for. Which pairing is correct?
Numbered key – young learners, using only pictures
Picture key – exactly two choices at every step
Branching key – a few organisms, easy to follow by eye
Field guide – light and quick to carry around
28.
Each option links a poor key question to a suggested improvement. Which pairing is correct?
"Does it have long ears?" – "Are its ears longer than its head?"
"Is it dark?" – "Is it very dark?"
"Is it fast?" – "Does it run quickly?"
"Does it have legs?" – "Is it a nice animal?"
29.
Each option links part of a numbered key to its meaning. Which pairing is correct?
"1a" – the answer that is always correct
"2b" – skip the next two steps
A name at the end of a line – go back to step 1
"go to 3" – move on to the pair of statements labelled 3
30.
A student judged four questions for a minibeast key. Which pairing is correct?
"Does it have six legs?" – poor, as legs are too hard to count accurately
"Does it hunt at night?" – poor, as behaviour is not seen on a specimen
"Does it have wings?" – poor, as wings change with the seasons
"Is its shell coiled?" – poor, as it depends on opinion
31.
Which term is described as: an identification route displayed as branches?
dichotomous key
organism
branching key
identification key
32.
Which term is described as: a key that gives two choices at each step?
branching key
organism
dichotomous key
identification key
33.
Which term is described as: a structured set of choices used to name an organism?
branching key
dichotomous key
organism
identification key
34.
Which term is described as: an individual living thing?
branching key
dichotomous key
identification key
organism
35.
Four students each wrote a dichotomous key in which every organism ends up on its own. Using the table, the key that must contain a mistake is _____.
Omar's key
Lina's key
Dev's key
Rosa's key
36.
For a key to work reliably, each question must be about a feature that is _____.
observable and does not change
chosen by the user's opinion
hidden inside the body
different in every season
37.
Mia writes down the statements she chose, for example 1b, 3a, 4b. This list is called her _____.
hypothesis for the key
control variable
prediction of the name
route through the key
38.
A key written as a list of paired statements, such as 1a and 1b, is called a _____.
branching key
numbered key
picture key
field guide
39.
Every question in a dichotomous key must split the organisms into two groups of exactly the same size. True or false?
True – otherwise the key is not dichotomous
False – groups can be unequal; the key still works
True, but only in keys with more than ten organisms
False – each question must leave three groups
40.
A picture key can offer more than two choices at a single step. True or false?
True – picture keys may show many choices
False – every kind of key has exactly two choices
False – picture keys have only one choice per step
True, but only when it is used outdoors
41.
In a branching key, the names of the organisms are found at the ends of the branches. True or false?
False – names are written at the start
False – branching keys contain no names
True – each branch ends at a name
True, but only for plant keys
42.
"Does it have more than six legs?" is a suitable key question because anyone can check the answer by counting. True or false?
False – leg numbers change as animals grow
False – questions must never involve numbers
True, but only if the animal is moving
True – it is observable with a yes/no answer
43.
"Is it a pretty flower?" is a good question to use in a key to wild flowers. True or false?
False – it is an opinion, so answers would differ
True – most people agree which flowers are pretty
True, as long as the flowers are fresh
False – keys can only be used for animals
44.
When making a key, you can stop splitting groups once each group contains two organisms. True or false?
True – two organisms can share one name
True, but only when the two organisms look alike
False – keep splitting until each is on its own
False – you stop when groups contain three
45.
In a numbered key, swapping the order of statements 2a and 2b (without changing what they say) changes the name the key gives. True or false?
True – the first statement is always the right one
True, because 2a must always mean Yes
False – but it changes the number of questions
False – each still leads to the same place
46.
Tiny organisms such as Amoeba cannot be identified with a key because they are too small. True or false?
True – keys only work for animals you can hold
False – their features can be seen with a microscope
True, because single cells have no features
False – but only by using a magnet
47.
A new key should be tested on specimens whose names are already known before other people use it. True or false?
True – wrong names show which steps need fixing
False – testing a key changes its questions
False – a new key is always correct
True, but only if the specimens are alive
48.
Two different keys for the same set of organisms can both be correct, even if they start with different questions. True or false?
False – there is only one correct key for any set
False – every key must start by asking about legs
True – many sets of features can work
True, but only if they have different names at the ends
49.
Students should wash their hands after handling wild fungi during a key activity. True or false?
False – fungi cannot harm people
False – only animals need hand washing
True, but only if the fungi are brightly coloured
True – some fungi are poisonous
50.
A numbered key usually takes up less space on a page than a branching key for the same organisms. True or false?
False – numbered keys always need more pages
True – numbered keys are compact
False – both layouts use exactly the same space
True, but only when it has no names
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Part of Grade 8 - Unit 4: Living organisms and classification — see every lesson and quiz in this unit.
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