Name the part of the plant which produces its food. Name this process.
Plants make their food by their own in the presence of sunlight with the help of carbon dioxide and water; and this process is known as photosynthesis. Photosynthesis is done by leaves. Green colour of leaves occurs due to pigment called chlorophyll whereas the chloroplast are the organelles that conducts the process photosynthesis.
Draw (a) a leaf, (b) a taproot and (c) a flower, you have studied for Table 7.3.
Which of the following leaves have reticulate venation?
Wheat, tulsi, maize, grass, coriander (dhania), China rose
Correct the following statements and rewrite them in your notebook.
(a) Stem absorbs water and minerals from the soil.
(b) Leaves hold the plant upright.
(c) Roots conduct water to the leaves.
(d) The number of petals and sepals in a flower is always equal.
(e) If the sepals of a flower are joined together, its petals are also joined together.
(f) If the petals of a flower are joined together, then the pistil is joined to the petal.
If a plant has fibrous root, what type of venation do its leaves likely to have?
Name two flowers, each with joined and separated sepals.
Can you find a plant in your house or in your neighborhood, which has a long but a weak stem? Write its name. In which category would you classify it?
In which part of a flower, you are likely to find the ovary?
Which of the following plants have you seen? of those that you have seen, which one have flowers?
Grass, maize, wheat, chilli, tomato, tulsi, pipal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut
Write the names of the parts of a flower.
If a plant has leaves with reticulate venation, what kind of roots will it have?
(a) Which kind of garbage is not converted into compost by the redworms?
(b) Have you seen any other organism besides redworms, in your pit? If yes, try to find out their names. Draw pictures of these.
Rearrange the boxes given below to make a sentence that helps us understand opaque objects.
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
Do you find that all living beings need the same kind of food?
Name the major nutrients in our food.
Classify the following fibres as natural or synthetic:
nylon, wool, cotton, silk, polyester, jute
Name five objects which can be made from wood.
Why do we need to separate different components of a mixture? Give two examples.
Fill in the blanks:
(a) Joints of the bones help in the ——————— of the body.
(b) A combination of bones and cartilages forms the _______ of the body.
(c) The bones at the elbow are joined by a ______________________ joint.
(d) The contraction of the _____________ pulls the bones during movement.
What is a habitat?
How do plants and animals help each other in the exchange of gases in the atmosphere?
You are given an iron strip. How will you make it into a magnet?
Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving
sugar? In which case would it be possible to dissolve more sugar?
Is it possible to separate sugar mixed with wheat flour? If yes, how will you do it?
Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.
When does a drought occur?
What is a habitat?
Name two foods each rich in:
(a) Fats
(b) Starch
(c) Dietary fibre
(d) Protein
Give an example of a non-living thing, which shows any two characteristics of living things.
Name the following:
(a) The nutrients which mainly give energy to our body.
(b) The nutrients that are needed for the growth and maintenance of our body.
(c) A vitamin required for maintaining good eyesight.
(d) A mineral that is required for keeping our bones healthy.