Science 7 · Unit 4: Grouping and identifying organisms · Cambridge Lower Secondary Science Stage 7

Questions

1. 📖 This question is about a text that students read in the app.

   1. Which feature could you use to tell these leaves apart?

   • whether the edge is smooth or toothed
   • which leaf is the biggest
   • whether the leaf is pretty
   • whether the leaf is green
   Check

2. 📖 This question is about a text that students read in the app.

   2. Which leaf has veins running along its length?

   • plume thistle
   • potentilla
   • Solomon's seal
   • mullein
   Check

3. 📖 This question is about a text that students read in the app.

   3. Which is the best question to use in a key for these leaves?

   • Is the leaf nice?
   • Is the leaf divided into leaflets?
   • Is the leaf bigger than the others?
   • Is the leaf green?
   Check

4. 4. Why is "Is the leaf larger than the others?" a poor question for a key?

   • Keys can only ask about colour.
   • Size cannot be measured.
   • Leaves are all the same size.
   • The person may have only one leaf to look at.
   Check

5. 📖 This question is about a text that students read in the app.

   5. Why is "Is the leaf green?" a poor question for this key?

   • Green is hard to see.
   • Only some leaves are green.
   • All the leaves are green, so it does not split them into groups.
   • Leaves are never green.
   Check

6. 📖 This question is about a text that students read in the app.

   6. Which leaf is made of three leaflets?

   • Solomon's seal
   • mullein
   • potentilla
   • wisteria
   Check

7. 📖 This question is about a text that students read in the app.

   7. Which leaf is cut into many long, narrow, spiky lobes?

   • Solomon's seal
   • wisteria
   • mullein
   • plume thistle
   Check

8. 📖 This question is about a text that students read in the app.

   8. A key asks "Is the leaf divided into leaflets or lobes?" Which two leaves answer yes?

   • wisteria and mullein
   • mullein and potentilla
   • potentilla and plume thistle
   • Solomon's seal and wisteria
   Check

9. 📖 This question is about a text that students read in the app.

   9. Which question separates potentilla from Solomon's seal?

   • Is the leaf green?
   • Is the leaf flat?
   • Does the leaf come from a plant?
   • Is the leaf made of three leaflets?
   Check

10. 📖 This question is about a text that students read in the app.

    10. A key asks "Does the leaf have a toothed edge?" Which two single leaves answer yes?

    • Solomon's seal and potentilla
    • mullein and potentilla
    • wisteria and mullein
    • Solomon's seal and wisteria
    Check

11. 📖 This question is about a text that students read in the app.

    11. Solomon's seal and wisteria both have smooth oval leaves. Which feature could tell them apart?

    • whether they are leaves
    • their colour
    • whether the edge is smooth
    • whether the leaf has a stalk, or the way its veins run
    Check

12. 12. A branching key separates 5 leaves. Each question splits one group into two. How many questions does the key need?

    • 4
    • 3
    • 2
    • 5
    Check

13. 13. What does a paired-statement key give at each step?

    • one question with many answers
    • two opposite statements to choose from
    • a list of all the organisms
    • a picture to match
    Check

14. 14. In a paired-statement key, what comes at the end of each statement?

    • the name of the organism, or the step to go to next
    • a picture of the organism
    • the number of legs
    • a question for the user
    Check

15. 📖 This question is about a text that students read in the app.

    15. A paired-statement key starts: 1a Leaf is divided into leaflets or lobes → go to 2. 1b Leaf is not divided → go to 3. Which statement fits mullein?

    • 1a, so it is plume thistle
    • 1b, so go to step 3
    • 1b, so it is potentilla
    • 1a, so go to step 2
    Check