Everyday Science – Page 155 – Brain Power Tests

An astronaut inside a spacecraft is in a state of weightlessness. This implies that?

Options:

A. The mass of the astronaut is reduced to zero
B. Gravity inside the spacecraft ceases to act
C. The astronaut is outside the influence of the earth
D. The astronaut and the spacecraft are both in a free-failing state

View Answer

D. The astronaut and the spacecraft are both in a free-failing state

The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?

Options:

A. The hair barging against the charged comb
B. Small electric sparks
C. The rubbing of the comb with the hair
D. None of the above

View Answer

B. Small electric sparks

The most densest substance on the Earth is __________.

Options:

A. Platinum
B. Copper
C. Steel
D. Osmium

View Answer

D. Osmium

GPS is an abbreviation for?

Options:

A. Global Poles System
B. Global PolySiliconium Store
C. Global Positioning System
D. Global Position Structure

View Answer

C. Global Positioning System

Carrot is good source of Vitamin _______?

Options:

A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D

View Answer

A. Vitamin A

Who is considered the founder of meteorology?

Options:

A. Aristotle
B. Plato
C. Einstein
D. Newton

View Answer

A. Aristotle

Humming bird belongs to a category called ?

Options:

A. Ectotherm
B. Endotherm
C. Exotherm
D. Heterotherm.

View Answer

B. Endotherm

Which of the following is not a part of Darwinism?

Options:

A. Over production
B. Natural selection
C. Inheritance for acquired characters
D. Competition for survival

View Answer

A. Over production

The position of earth in its orbit, when it is at its greatest distance from the sun causing northern summer is called ___________?

Options:

A. Aphelion
B. Perihelion
C. Perigee
D. Apogee

View Answer

A. Aphelion

Yeast is used in making bread because it produces____________?

Options:

A. Carbon dioxide
B. Sugar
C. Bacteria
D. Oxygen

View Answer

A. Carbon dioxide