GK Questions for Class 7 with Answers

Which part of a plant is called its "food factory"?

• Root
• Leaf
• Stem
• Flower

Answer: Leaf. Leaves make food by photosynthesis using sunlight, water, carbon dioxide and the green pigment chlorophyll. The stem carries water and food between roots and leaves.

What colour does blue litmus paper turn when dipped in an acid?

• Green
• Red
• Yellow
• It stays blue

Answer: Red. Acids turn blue litmus red, and bases turn red litmus blue. Litmus is a natural indicator obtained from lichens.

On which layer of the Earth do we live?

• Crust
• Mantle
• Outer core
• Inner core

Answer: Crust. The crust is the thin outermost layer of the Earth. Below it lies the mantle, and at the centre is the core, made mostly of nickel and iron.

Which Mughal emperor built the Taj Mahal in memory of his wife Mumtaz Mahal?

• Akbar
• Shah Jahan
• Jahangir
• Aurangzeb

Answer: Shah Jahan. Shah Jahan built the Taj Mahal at Agra on the bank of the Yamuna. He also built the Red Fort and the Jama Masjid in Delhi.

Rusting of iron is an example of which kind of change?

• Temporary change
• Physical change
• Change of state
• Chemical change

Answer: Chemical change. Rusting forms a new substance, iron oxide, so it is a chemical change. It needs both oxygen and water (moisture).

Which gas makes up the largest part of the air around us?

• Nitrogen
• Oxygen
• Carbon dioxide
• Argon

Answer: Nitrogen. Nitrogen makes up about 78 per cent of the air and oxygen about 21 per cent. Carbon dioxide is only a tiny fraction.

What is the SI unit of speed?

• Kilometre per hour
• Metre per second
• Metre
• Second

Answer: Metre per second. Speed is distance divided by time, so its SI unit is metre per second (m/s). Kilometre per hour is common on car speedometers but is not the SI unit.

Which instrument is used to measure rainfall?

• Thermometer
• Barometer
• Wind vane
• Rain gauge

Answer: Rain gauge. A rain gauge collects rain so the amount can be measured in millimetres. A wind vane shows the direction of the wind.

The Amazon, the largest tropical rainforest in the world, lies mostly in which country?

• Mexico
• Argentina
• Brazil
• Chile

Answer: Brazil. Most of the Amazon rainforest is in Brazil, with parts in neighbouring countries such as Peru and Colombia. It is home to a huge variety of plants and animals.

In which organ is the digestion of food completed and the digested food absorbed into the blood?

• Food pipe
• Stomach
• Large intestine
• Small intestine

Answer: Small intestine. The small intestine finishes digestion and its finger-like villi absorb the food. The large intestine mainly absorbs water and salts.

Who wrote the "Akbarnama", the history of Emperor Akbar's reign?

• Tansen
• Amir Khusrau
• Abul Fazl
• Birbal

Answer: Abul Fazl. Abul Fazl, a friend and courtier of Akbar, wrote the Akbarnama in three volumes. Amir Khusrau was a poet and musician of the Delhi Sultanate period.

Which Bhakti saint, who grew up in a family of weavers near Varanasi, composed popular dohas?

• Kabir
• Mirabai
• Tulsidas
• Surdas

Answer: Kabir. Kabir's dohas criticised blind ritual and spoke of one formless God. Mirabai was a Rajput princess devoted to Krishna.

Which Delhi Sultan began building the Qutb Minar?

• Alauddin Khalji
• Iltutmish
• Qutbuddin Aibak
• Muhammad bin Tughluq

Answer: Qutbuddin Aibak. Qutbuddin Aibak started the Qutb Minar around 1199, and his successor Iltutmish added more storeys. It is a UNESCO World Heritage Site in Delhi.

How does an amoeba capture its food?

• Using finger-like projections called pseudopodia
• Using hair-like cilia
• Using a long whip-like flagellum
• Using tentacles

Answer: Using finger-like projections called pseudopodia. Amoeba pushes out pseudopodia ("false feet") around a food particle and traps it in a food vacuole. Paramecium uses cilia instead.

By which method does heat from the Sun reach the Earth through empty space?

• Insulation
• Conduction
• Convection
• Radiation

Answer: Radiation. Radiation needs no medium, so heat can cross the vacuum of space. Conduction and convection both need a material medium to pass heat along.