KIIT INTERNATIONAL SCHOOL
GRADE – IV
SUBJECT – SCIENCE
CHAPTER- PLANTS AND THEIR FOOD
FILL IN THE BLANKS: (to be done in the notebook)
1. The presence of starch can be tested by using _____________
solution.
2. The parasitic plant that kills the plant on which it grows is
__________ parasitic plant.
3. Chlorophyll is found in ___________ parasitic plant.
4. Dodder is a ______________ parasitic plant.
5. Plants that feed on insects are called __________________ plants.
6. Plants use ____________ that the animals breathe out.
7. A total parasitic plant cannot make food because it lacks
______________.
8. ____________ and ___________ are edible flowers.
9. Sweet potato is an edible________.
10. Plants store food in the form of __________.
DEFINE
1. Chlorophyll
2. Photosynthesis
3. Stomata
4. Total parasitic plant
5. Partial parasitic plant
6. Insectivorous plant
NOTES (to be done in the notebook)
14.Write an experiment to show the presence of starch in food. (iodine test)
Aim- to test the presence of starch in the given food items
Things required- Potato, cooked rice, sugar cubes, salt and iodine solution
Method- Take the different food items in different dishes and put few drops of
iodine solution on each food item.
Observation- Iodine change its colour to bluish black in case of rice and potato but
it doesn’t change its colour on sugar and salt. Iodine reacts with starch and changes
its colour to bluish black.
Result- potato and cooked rice contain
starch.
15.What are parasitic plants?
Plants which grow on other plants (host) and take water and nutrients from them
are called as parasitic plants.
Parasitic plants are of two kinds-
a. Total parasitic plant
b. Partial parasitic plants
16.Write the difference between a total parasitic and a partial parasitic plant.
Give one example each.
TOTAL PARASITIC PLANT PARTIAL PARASITIC PLANT
These plants do not have These plants have chlorophyll
chlorophyll, so they cannot make and can make their own food.
their own food. They depend on other plants
They take food and water from (host) for water and certain
the plant on which they grow nutrients.
(host) They don’t kill the host plant.
They kill the host plant. Eg. MISTLETOE
Eg DODDER
17.What are insectivorous plants? Give two examples?
Plants that feed on insects are called as insectivorous or carnivorous plants.
Eg PITCHER PLANT
VENUS FLY TRAP
18.How does a pitcher plant catch insects?
1. The pitcher plant has a pitcher (pot like structure) with nectar in it. The
nectar attracts the insects.
2. When an insect enters the pitcher, it touches the hair like structure
present inside the pitcher.
3. These hair like structures, on being disturbed, close the flap and the insect
gets trapped inside the pitcher.
19.How does Venus fly trap catch insects?
1. The leaves of a Venus flytrap have spine like structures around them.
2. When an insect enters the Venus flytrap, it closes and the insect is trapped
inside.
3. It secrete digestive juices and the insect gets digested.
20.How do insectivorous plants digest the trapped insects? Do they make their
own food?
Insectivorous plants digest the insects with the help of digestive juices secreted
by them. Yes, they make their own food.
21.How do plants depend on animal?(3 ways)
1. Plants get carbon dioxide from the animals.
2. Animals help in spreading of seeds. (dispersal)
3. Insects help the plants in making fruits. ( pollination)
22.How do animals depend on plants?(3 ways)
1. Animals get oxygen from the plants.
2. They get food from the plants.
3. Plants provide shelter to animals like birds, insects and
squirrels.
