3D - Isadora's; Alice's; Milena's.

What is the primary postulate of special relativity regarding the speed of light?

• The speed of light can vary depending on the observer's speed.

• The speed of light is always constant in a vacuum, regardless of the observer's motion.

• Light travels faster in denser materials.

• The speed of light is only constant for objects at rest.

According to special relativity, what happens to time as an object moves closer to the speed of light?

• Time speeds up for the moving object compared to a stationary observer.

• Time slows down for the moving object compared to a stationary observer.

• Time remains the same for both the moving and stationary observers.

• Time only slows down for the stationary observer.

What is the main concept of general relativity regarding gravity?

• Gravity is a force that pulls objects together.

• Gravity is caused by the motion of objects in space.

• Gravity is the curvature of space-time caused by mass.

• Gravity only affects objects at rest.

According to general relativity, what effect does strong gravity have on time?

• Time speeds up near massive objects.

• Time slows down near massive objects.

• Time is unaffected by gravity.

• Time only slows down in a vacuum.

Which of the following phenomena is a prediction of general relativity?

• The existence of black holes.

• The color of stars.

• The motion of planets in circular orbits.

• The acceleration of gravity on Earth.

What are the motivations for Brazilian colonization in the 14th century?

• Protect the newly arrived land from the interests of other countries in addition to exploratory interests.

• To establish a military base against Spain in addition to escaping religious persecution in Europe.

• To create a new trade route to North America to sell spices.

• To find gold and silver and spread catholicism.

Who was the leader of the Portuguese expedition that discovered Brazil?

• Christopher Columbus

• Hernán Cortés

• Pedro Álvares Cabral

• Vasco da Gama

What were the primary economic activities of the Portuguese colonists in Brazil?

• Agriculture and mining

• Fishing and hunting

• Manufacturing and trade

• Slavery and piracy

How did the Portuguese treat the indigenous people of Brazil?

• With respect and admiration

• With violence and enslavement

• With fear and caution

• With friendship and cooperation

What was the original name given to the Brazilian territory by Cabral?

• Brasil

• Ilha de Vera Cruz

• Terra da Santa Cruz

• Nova Lisboa