EARTH AND SPACE

Where is weightlessness experienced?

• On a field

• In a science lab

• In space

• In a Classroom

Answer explanation

Weightlessness is experienced in space, where the effects of gravity are significantly reduced or eliminated.

______ was the first man to orbit round the earth.

• Neil Armstrong

• John Newton

• Francis Dalton

• Yuri Gagarin

Answer explanation

Yuri Gagarin was the first man to orbit round the earth, making him the correct choice.

_______ is a state of not experiencing gravitational force

• Power

• Push and Pull

• Weightlessness

• Weight

Answer explanation

Weightlessness is the state of not experiencing gravitational force, making it the correct choice for the given question.

A body will have potential energy because of its __.

• position

• speed

• size

• acceleration

Answer explanation

A body will have potential energy because of its position, as potential energy is related to the position of an object in a gravitational field.

______ possesses negative charges.

• Electrons

• Protons

• Neutrons

• Shell

Answer explanation

Electrons possess negative charges, making them the correct choice.

What does friction do to a piece of chalk?

• It explodes

• It melts

• It wears down

• It breaks it into half

Answer explanation

Friction wears down a piece of chalk by gradually eroding its surface, making it smaller over time.

What type of energy does water in a flowing river have?

• Electrical

• Potential

• Magnetic

• Kinetic

Answer explanation

Water in a flowing river possesses kinetic energy due to its movement.

A satellite ________.

• revolves round a planet

• does not move

• is bigger than a planet

• rotates round the moon

Answer explanation

The correct choice is 'revolves round a planet' because satellites orbit around planets, not stay stationary, be larger than planets, or rotate around the moon.

When two things are rubbed together, what kind of force do they produce?

• Stuck

• Pulling

• Friction

• Dynamic

Answer explanation

When two things are rubbed together, they produce a force known as friction.

Which of the following is the first artificial satellite?

• Sputnik

• GSAT-17

• GSAT-19

• SAT

Answer explanation

Sputnik is the first artificial satellite launched into space, making it the correct choice among the options provided.