Secondary School (English Medium) (5 to 8) Class 7 - CBSE Question Bank Solutions for Science

You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either

An erect and enlarged image can be formed by

You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from

An image formed by a lens is erect. Such an image could be formed by a

State whether the following statement is True or False.

The sides of an object and its image formed by a concave mirror are always interchanged

The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?

State whether the following statement is True or False. If false, give the correct statement.

The process of seeping of water into ground is called filtration

From where do the following usually get water? In which form is water present in them?

Mountain tops

Which of the following is not prepared from the wood obtained from forest?

The main excretory product in human beings is ______.

Sweat contains water and ______.

Kidneys eliminate the waste materials in the liquid form called ______.

Photosynthesis requires chlorophyll, and a few other raw materials. Add the missing raw materials to the list given below:

Water, minerals, (a) _____________, (b) ______________.

A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could be seen sprouting in the plant again. How did the plant survive without leaves?

Sunlight, chlorophyll, carbon dioxide, water and minerals are raw materials essential for photosynthesis. Do you know where they are available? Fill in the blanks with the appropriate raw materials.

1. Available in the plant: _______________
2. Available in the soil: _______________, _______________
3. Available in the air: _______________
4. Available during day: _______________

Wild animals like tiger, wolf, lion and leopard do not eat plants. Does this mean that they can survive without plants? Can you provide a suitable explanation?

Mark the following statement as True or False. If false, write the correct statement.

The large intestine is longer and wider than the small intestine of the human alimentary canal.

Large intestine absorbs ___________ and some __________ from the undigested food.

The muscular tube through which stored urine is passed out of the body is called –

Arrange the following statements in the correct order in which they occur during the formation and removal of urine in human beings.

1. Ureters carry urine to the urinary bladder.
2. Wastes dissolved in water are filtered out as urine in the kidneys.
3. Urine stored in the urinary bladder is passed out through the urinary opening at the end of the urethra.
4. Blood containing useful and harmful substances reaches the kidneys for filtration.
5. Useful substances are absorbed back into the blood.