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Curriculum

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

Plants And Water – Quiz

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Plants And Water HIA Science quiz: free practice for HIA International. Work through this Plants And Water HIA Science quiz and get instant feedback on every answer. If you get stuck, review the 22.6 Plants And Water – Notes lesson. More practice: HIA International — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: A-
  • Time limit:
Start Quiz
1.
How does water enter a root hair cell?
By respiration
By combustion
By photosynthesis
By osmosis
2.
What is the job of the xylem?
To carry sugar down the plant
To carry water up the plant
To make food
To absorb light
3.
Why does a plant wilt?
It loses water faster than it absorbs it
It stops respiring
It is too cold
It has too much water
4.
What is turgor?
The movement of water up the stem
A type of mineral ion
The drooping of a plant
The firmness of a plant cell when it is full of water
5.
What are mineral ions?
Gases let out by stomata
Dissolved nutrients such as nitrates absorbed with water
Sugars made in the leaf
Tubes in the stem
6.
How is a root hair cell adapted for absorbing water?
It has many chloroplasts
It has a thick waxy layer
It has a long thin extension giving a large surface area
It is dead and hollow
7.
How are xylem vessels adapted to carry water?
They have thick end walls
They are living cells with large nuclei
They are full of chloroplasts
They are dead, hollow tubes with no end walls
8.
Where are stomata found on most leaves?
In the soil
Inside the xylem
On the underside of the leaf
At the tip of the roots
9.
How does water help to support a plant?
It makes the stem heavier
It makes the roots grow faster
It dissolves the cell walls
It keeps the cells turgid
10.
What do leaf cells use water for?
Opening the soil
Absorbing minerals
Photosynthesis
Making xylem
11.
A plant's roots are damaged. What is the most likely result?
The plant grows faster
The plant wilts because less water is absorbed
The plant gains mass
The leaves make more food
12.
In the diagram of a root hair cell, which label shows the long extension that increases surface area?
Dr Dabour Hub Academy - figure 1
R
P
S
Q
13.
In the root hair cell diagram, which label shows the nucleus?
Dr Dabour Hub Academy - figure 2
S
P
R
Q
14.
Why do root hair cells not have chloroplasts?
Dr Dabour Hub Academy - figure 3
They are dead cells
They are underground where there is no light for photosynthesis
Chloroplasts would absorb water
They are too small
15.
Using the bar chart, how fast did the dye rise in the celery?
Dr Dabour Hub Academy - figure 4
8 cm per minute
2 cm per minute
0.5 cm per minute
0.2 cm per minute
16.
Using the bar chart, predict the height of the dye after 50 minutes.
Dr Dabour Hub Academy - figure 5
5 cm
8 cm
12 cm
10 cm
17.
The cross-section shows a stem after standing in red dye. What do the red areas show?
Dr Dabour Hub Academy - figure 6
The xylem, which carries water
The stomata
The chloroplasts
The root hairs
18.
Using the graph, at which sugar concentration did the potato pieces not change mass?
Dr Dabour Hub Academy - figure 7
0.2 mol/dm³
1.0 mol/dm³
0.4 mol/dm³
0 mol/dm³
19.
Using the graph, why did potato pieces in pure water gain mass?
Dr Dabour Hub Academy - figure 8
The cells grew new parts
Sugar moved into the cells
Water moved into the cells by osmosis
Water left the cells
20.
In the potato experiment, which variables must be kept the same?
Dr Dabour Hub Academy - figure 9
The change in mass
The size of the potato pieces and the time in solution
The results table layout only
The sugar concentration
21.
Why should the potato pieces be gently blotted dry before weighing?
Dr Dabour Hub Academy - figure 10
To speed up osmosis
To kill the cells
To remove surface solution that would add extra mass
To make them lose water
22.
Which cell in the diagram is turgid?
Dr Dabour Hub Academy - figure 11
Neither
Cell A
Cell B
Both
23.
Cell B in the diagram came from a wilted plant. What happened to it?
Dr Dabour Hub Academy - figure 12
It lost water, so its vacuole shrank
It grew a new wall
It made more chloroplasts
It gained water
24.
In the diagram, which label shows where water enters the plant?
Dr Dabour Hub Academy - figure 13
Z
X
W
Y
25.
Which label in the diagram shows where water travels up through xylem in the stem?
Dr Dabour Hub Academy - figure 14
Y
X
Z
W
26.
Using the graph, how much mass did the unwatered plant lose in 5 days?
Dr Dabour Hub Academy - figure 15
418 g
500 g
82 g
18 g
27.
What is the purpose of the watered plant in the graph?
Dr Dabour Hub Academy - figure 16
It makes the other plant wilt
It is a control to compare with the unwatered plant
It adds water to the air
It has no purpose
28.
What is the second step in the flow chart?
Dr Dabour Hub Academy - figure 17
Soil water surrounds the root hairs
It reaches the leaves
Water enters the root hair cell by osmosis
Xylem carries it up
29.
Use the table. Which part passes water inwards through loosely packed cells?
Xylem
Root cortex
Stomata
Leaf cells
30.
Use the table. What happens if the xylem fails?
The plant wilts
Photosynthesis increases
Stomata close forever
No water is taken up by roots
31.
Use the table. What is the missing percentage change in mass?
-2%
+2%
-10%
10%
32.
Use the table. What is the mean dye height at 30 minutes?
5.8 cm
18 cm
6 cm
6.2 cm
33.
Use the table. Which celery result is anomalous?
Stalk 2
Stalk 4
Stalk 1
Stalk 3
34.
Use the table. In which solution did the potato cells lose the most water?
Solution A
Solution B
Solution D
Solution C
35.
Use the table. Which plant is most likely to wilt first?
Plant 4
Plant 1
Plant 2
Plant 3
36.
A student's notes contain one mistake. Which row?
Stomata let water vapour out
Xylem carries water upwards
Root hairs increase surface area
Water enters roots by active transport
37.
How could the celery experiment be improved to show the xylem clearly?
Cut thin cross-sections and look at them under a microscope
Use a shorter time
Use clear water with no dye
Leave the leaves off the table
38.
Why should the celery stalks be cut under water before putting them in dye?
To kill the cells
To remove the leaves
To make them heavier
To stop air bubbles blocking the xylem
39.
A student wants to find out whether temperature affects how fast water moves up celery. Which plan is best?
Put identical celery stalks in the same dye at different temperatures and measure dye height after the same time
Use different dyes at each temperature
Use stalks of different lengths at one temperature
Measure only one stalk
40.
Which pairing of part and job is correct?
Leaf cells - absorb minerals from soil
Stomata - let water vapour out
Root hair cell - carries water up
Xylem - absorbs light
41.
The movement of water into a cell through a partially permeable membrane is called _____.
respiration
diffusion of gases
transpiration
osmosis
42.
The drooping of a plant that has lost too much water is called _____.
germination
osmosis
wilting
turgor
43.
Water is carried up the stem in the _____.
chloroplast
stomata
xylem
root hair
44.
Water enters the root by osmosis, not by active transport. True or false?
True
False
False, it is by active transport
True, but only at night
45.
Xylem vessels are living cells full of cytoplasm. True or false?
False
True, they have large nuclei
False, they are full of air
True
46.
Root hair cells have a very large surface area for absorption. True or false?
False
False, they are very small and smooth
True, but only in trees
True
47.
A plant left unwatered on a hot day may wilt. True or false?
False, plants never wilt
True
False
False, heat stops water loss
48.
Water keeps plant cells turgid, which supports the plant. True or false?
False
True, but only in roots
True
False, water weakens plant cells
49.
Mineral ions such as nitrates are taken in with the water. True or false?
False
False, plants do not need minerals
True
False, they enter through the leaves
50.
Water travels down the xylem from leaves to roots. True or false?
False, it does not move at all
True
False
True, it flows downwards
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Part of Unit 4: Maintaining life — see every lesson and quiz in this unit.
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