61. The outermost layer of earth is called _______.
(A) core
(B) crust
(C) mental
(D) None of these
Answer:
(B) crust
Explanation:
The Earth is divided into three main layers. The solid, outermost shell on which we live is called the crust.
62. _______ is the instrument used for measuring earthquakes on the Richter scale.
(A) Ammeter
(B) Barometer
(C) Seismograph
(D) Voltameter
Answer:
(C) Seismograph
Explanation:
A seismograph is a highly sensitive scientific instrument used to detect and record the seismic waves generated by an earthquake.
63. _______ came from Europe.
(A) Cabbage and peas
(B) Mango and orange
(C) Methi and spinach
(D) Potato and tomato
Answer:
(A) Cabbage and peas
Explanation:
According to the classic NCERT EVS poem “Who came from where,” cabbage and peas were historically introduced to India by traders traveling from Europe.
64. _______ is caused by deficiency of _______.
(A) Anaemia, calcium
(B) Anaemia, iron
(C) Dengue, calcium
(D) Dengue, iron
Answer:
(B) Anaemia, iron
Explanation:
Anaemia is a medical condition caused by a lack of healthy red blood cells, which is most commonly due to a dietary deficiency of iron.
65. Parasite of Malaria is discovered by _______.
(A) Dr. Ronald Ross
(B) Dr. Hargobind Khurana
(C) Dr. Beaumont
(D) Dr. Sarabhai
Answer:
(A) Dr. Ronald Ross
Explanation:
Sir Ronald Ross, a British medical doctor, received the Nobel Prize for discovering that the malaria parasite is transmitted directly through the bite of infected female Anopheles mosquitoes.
