Curriculum
Course: HIA International — Grade 8
Login

Curriculum

HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

0/22

Unit 2: Properties of materials

0/50

Unit 3: Forces and energy

0/50

Unit 4: Maintaining life

0/34

Unit 5: Reactivity

0/41

Unit 6: Sound and space

0/40

Unit 7: Genes and inheritance

0/30

Unit 8: Rates of reaction

0/34

Unit 9: Electricity

0/36
Quiz

1.1 Photosynthesis

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit

Photosynthesis HIA Science quiz set 2: free practice for HIA International. Work through this Photosynthesis HIA Science quiz set 2 and get instant feedback on every answer. If you get stuck, review the 19.1 Photosynthesis – Notes lesson. More practice: HIA International — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: A-
Start Quiz
1.
The diagram shows a section through a leaf with five parts labelled A to E. Which layer carries out most of the photosynthesis, and why?
Dr Dabour Hub Academy - figure 1
A – it is the layer closest to the light from above
B – tall cells packed with chloroplasts near the top
C – its air spaces let carbon dioxide reach every cell
E – it carries the water that photosynthesis needs
2.
Jo set up the step of the starch test shown in the diagram. What is wrong with her set-up and how should she correct it?
Dr Dabour Hub Academy - figure 2
The leaf needs more light; move the tube closer to a lamp
Ethanol boils too slowly; turn the Bunsen up to a roaring flame
Ethanol is flammable; stand the tube in hot water with the Bunsen off
The tube is too full; pour away the ethanol and use iodine instead
3.
The diagram shows three leaves on white tiles after iodine solution was added. Leaf R is still dark green, so its colour is hard to judge. Which step did Amir miss out for leaf R?
Dr Dabour Hub Academy - figure 3
Keeping the plant in the dark for 48 hours before the test
Adding iodine solution to the leaf on the white tile
Putting the plant in the light for several hours
Putting the leaf in hot ethanol to remove the chlorophyll
4.
The diagram shows a plant in bright sunlight. Arrows 1 to 4 show things moving into, out of or through the plant. Which description is correct?
Dr Dabour Hub Academy - figure 4
Arrow 3 – oxygen diffusing out of the leaf through stomata
Arrow 2 – oxygen diffusing into the leaf through stomata
Arrow 4 – glucose moving up from the soil in the xylem
Arrow 1 – carbon dioxide being absorbed by chlorophyll
5.
Meera measured the starch in bean leaves over one day. Which explanation best fits the change in her graph between 18 and 24 hours?
Dr Dabour Hub Academy - figure 5
In the dark the leaf makes starch faster because it is cooler
With no light, starch is broken down and used, e.g. for respiration
Starch is turned back into carbon dioxide by photosynthesis
The leaf stops respiring at night, so its starch is destroyed
6.
Diego looked at the two surfaces of a sunflower leaf under a microscope, as shown. Through which surface does most carbon dioxide enter the leaf?
Dr Dabour Hub Academy - figure 6
The upper surface, since it faces the light
Both surfaces equally, since both have guard cells
Neither surface; CO2 is taken in by the roots
The lower surface, since most stomata are there
7.
A plant grown without magnesium ions develops yellow leaves. Which labelled part of the palisade cell in the diagram is most directly affected?
Dr Dabour Hub Academy - figure 7
Part K, the chloroplasts
Part J, the cell wall
Part L, the vacuole
Part M, the nucleus
8.
Use the symbol equation and the table. When a leaf uses 30 molecules of carbon dioxide, how many molecules of glucose and oxygen does it make?
30 glucose and 5 oxygen
5 glucose and 5 oxygen
5 glucose and 30 oxygen
1 glucose and 30 oxygen
9.
Solution 1 contained all minerals. Solutions 2 and 3 each lacked one mineral. Using the table, which conclusion is best supported?
Solution 2 lacked nitrate, so chlorophyll could not be made
Solution 3 lacked nitrate, so less protein was made for growth
Solution 3 lacked magnesium, so the plants grew fastest
Solution 2 lacked water, so the leaves could not open
10.
Why is plant Y an important part of this investigation?
It shows destarching worked, so the starch in Z was new
It shows plants need oxygen from the air to make starch
It proves that iodine does not work on leaves kept in the dark
It shows that plant X had been destarched correctly as well
11.
Using the table, which leaf lets carbon dioxide reach its palisade cells fastest, and why?
Leaf G, since it is thicker and so holds more carbon dioxide
Leaf F, since it has more chloroplasts in each palisade cell
Leaf G, since its larger surface area absorbs more of the gas
Leaf F, since it is thinner, so gases diffuse a shorter distance
12.
Tom collected the gas given off by pondweed in a lamp's light and tested it. Using the table, what is the gas?
Carbon dioxide, a product of photosynthesis
Carbon dioxide, a reactant used in photosynthesis
Oxygen, a product of photosynthesis
Water vapour, released through the stomata
13.
The potato plant is moved to soil that has no nitrates. Which use of glucose in the table will be reduced most directly?
Respiration to release energy for the cells
Making proteins and other substances
Making starch to store in the tubers
Making cellulose to build new cell walls
14.
The table shows how many stomata are open at different times. Which explanation best fits this pattern?
Guard cells open stomata when light allows photosynthesis
Stomata open at midday so that more oxygen can enter
Stomata close in the dark so that glucose cannot escape
Guard cells open stomata at night to let the leaf breathe
15.
Which is the correctly balanced symbol equation for photosynthesis?
C6H12O6 + 6O2 → 6CO2 + 6H2O
6CO2 + 6O2 → C6H12O6 + 6H2O
CO2 + H2O → C6H12O6 + O2
6CO2 + 6H2O → C6H12O6 + 6O2
16.
Why is photosynthesis described as an endothermic process?
It takes in light energy and stores it in glucose
It releases heat energy as glucose is being made
It only happens when the temperature is high
It makes energy from carbon dioxide and water
17.
A mutant tobacco plant has leaves with almost no air spaces in the spongy layer. Which process is most likely to be slowed?
Water moving up from the roots through the xylem
Light passing through the upper epidermis
Carbon dioxide diffusing to the photosynthesising cells
Magnesium ions being absorbed by the root hair cells
18.
Kofi says: "A tree gets the food it needs to grow from the soil." Which reply is most accurate?
Correct – roots absorb glucose that is already in the soil
The tree makes glucose; soil gives water and minerals
Correct – the soil supplies all the carbon for the wood
Wrong – the tree takes nothing at all from the soil
19.
Anika wants to show that pondweed gives off oxygen in light. Which plan would work best?
Put the pondweed in the dark and test the water with iodine
Collect the bubbles and bubble them through limewater to see it go milky
Boil the pondweed in ethanol and then count the bubbles given off
Collect the bubbles in an upside-down tube, then test with a glowing splint
20.
In the starch test, why is the leaf first put in boiling water for about a minute?
To make the leaf photosynthesise more quickly
To dissolve the starch out of the leaf cells
To kill the leaf and soften the cell walls
To turn the chlorophyll from green to blue-black
21.
Each leaf feature helps photosynthesis. Which pairing is correct?
Guard cells – open and close the stomata
Air spaces – absorb light for the chloroplasts
Broad, flat shape – short path for water to travel
Xylem in veins – carries glucose to the roots
22.
Each substance is linked to photosynthesis. Which pairing is correct?
Oxygen – taken in through the root hairs
Water – absorbed by root hair cells
Glucose – absorbed from the air by stomata
Carbon dioxide – carried up in the xylem
23.
Glucose made in photosynthesis is used in several ways. Which pairing is correct?
Starch – releasing energy in respiration
Protein – made from glucose alone
Respiration – storing glucose for winter
Cellulose – building new cell walls
24.
Each step of the starch test has a purpose. Which pairing is correct?
Boiling water – turns the starch blue-black
Iodine solution – softens the cell walls
Hot ethanol – removes the green chlorophyll
Rinsing in warm water – adds more starch
25.
Which term is described as: the process in which a plant makes its own food using light?
photosynthesis
glucose
chlorophyll
pigment
26.
Match the term to its correct meaning: photosynthesis
the process in which a plant makes its own food using light
the substances that are used up in a reaction
the new substances that are made in a reaction
the green pigment in leaf cells that captures energy from sunlight
27.
Which term is described as: the green pigment in leaf cells that captures energy from sunlight?
chlorophyll
carbon dioxide
oxygen
pigment
28.
Match the term to its correct meaning: chlorophyll
the new substances that are made in a reaction
the green pigment in leaf cells that captures energy from sunlight
a sugar that is made as a product of photosynthesis
the gas that is released as a product of photosynthesis
29.
Which term is described as: a sugar that is made as a product of photosynthesis?
glucose
photosynthesis
reactants
chlorophyll
30.
Photosynthesis means 'making with _____'.
heat
air
water
light
31.
The green pigment that captures light energy is called _____.
haemoglobin
starch
chlorophyll
glucose
32.
Carbon dioxide moves from the air into the leaf by _____.
diffusion
photosynthesis
transpiration
respiration
33.
Sugars made in the leaves are carried to other parts of the plant in the _____.
xylem vessels
phloem tubes
root hair cells
guard cells
34.
Most leaves are broad and flat, which gives them a large _____ for absorbing light.
diffusion distance
number of veins
volume of water
surface area
35.
Before a starch investigation, the plant is kept in the dark for 48 hours to _____.
give it more water
warm it up fully
remove its starch
make more glucose
36.
Photosynthesis takes place mainly in the leaves of a plant. - True or false?
True
False
37.
Photosynthesis takes place mainly in the roots of a plant. - True or false?
True
False
38.
The energy used in photosynthesis comes from sunlight. - True or false?
True
False
39.
Carbon dioxide enters a leaf mainly by diffusion through stomata on its lower surface. True or false?
True – it diffuses in through the pores
False – it is pulled up from the roots in xylem
False – it passes straight through the cuticle
True, but only when the leaf is in darkness
40.
Plants only respire at night, when they are not photosynthesising. True or false?
True – photosynthesis replaces respiration in light
False – plants respire all the time
True – plants only need energy when it is dark
False – plants never respire because they make glucose
41.
Chlorophyll makes the light energy that a plant uses in photosynthesis. True or false?
True – chlorophyll produces light inside leaves
True – the green colour is made from light
False – chlorophyll absorbs light energy
False – chlorophyll absorbs carbon dioxide
42.
In the starch test, the ethanol should be heated in a water bath with the Bunsen burner turned off. True or false?
True – ethanol is highly flammable
False – ethanol must be boiled over a flame
False – the ethanol does not need to be warm
True, but only so the iodine will dissolve
43.
Some of the glucose made in photosynthesis is converted into cellulose to build cell walls. True or false?
False – cellulose is taken in from the soil
False – glucose can only be used in respiration
True, but only in the cells of the roots
True – cellulose is made from glucose
44.
A geranium kept in a dark cupboard for 48 hours will give a blue-black colour when a leaf is tested with iodine. True or false?
True – plants store starch for many weeks
False – its stored starch has been used up
True – plants photosynthesise in the dark too
False – iodine only works on the roots of plants
45.
Water for photosynthesis is carried from the roots to the leaves in the phloem. True or false?
True – phloem carries all substances in a plant
True – the phloem joins the roots to the stomata
False – water enters through the stomata instead
False – water travels in the xylem
46.
Because photosynthesis stores light energy, glucose and oxygen contain more chemical energy than the carbon dioxide and water used. True or false?
False – energy is lost as glucose is being made
False – the reactants and products have equal energy
True – light energy is stored as chemical energy
True, but only if the plant is kept warm
47.
A thicker leaf would let carbon dioxide reach its palisade cells more quickly than a thin leaf. True or false?
False – thin leaves give a shorter diffusion path
True – a thicker leaf has more room for the gas
True – carbon dioxide moves faster in thick tissue
False – carbon dioxide enters through the roots
48.
In the food chain grass → rabbit → fox, the energy in the fox's body first entered the chain as light absorbed by the grass. True or false?
False – the fox gets its energy from respiring air
True – the grass stored it in glucose
False – the rabbit makes the energy from grass
True, but only for foxes that also eat plants
49.
If iodine solution stays orange-brown on a leaf, this shows that starch is present. True or false?
True – orange-brown is the colour for starch
True, but only if the leaf is also green
False – orange-brown shows glucose is present
False – starch turns iodine blue-black
50.
The oxygen made in photosynthesis leaves the plant by travelling down the xylem to the roots. True or false?
True – oxygen is carried away in the xylem
True – roots release oxygen into the soil
False – it diffuses out through stomata
False – plants keep all of the oxygen they make
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
Part of Unit 1: Photosynthesis and the carbon cycle — see every lesson and quiz in this unit.
Accepted payment methods