Simple present
Present continuous
Simple past
100

How are cookies made?

Cookies are made with flour, sugar, eggs, and butter, and then baked in the oven.

100

What is being studied by scientists in the field of genetics?

Scientists are studying the genetic code that is being passed down from generation to generation.

100

Who was the Mona Lisa painted by and when was it completed?

The Mona Lisa was painted by Leonardo da Vinci and it was completed in the early 16th century.

200

How is the Mona Lisa protected?

The Mona Lisa is protected by a thick layer of bulletproof glass and a sophisticated security system.

200

What is currently being developed in the field of medicine?

New medications are currently being developed that will help treat a variety of illnesses and diseases.

200

When was America discovered?

America was discovered in 1492.

300

How are new words added to the dictionary?

New words are added to the dictionary by a team of lexicographers who monitor language usage and trends.

300

What is being done to combat climate change?

Efforts are currently being made to reduce carbon emissions and increase the use of renewable energy sources.

300

What was the first vaccine developed for?

The first vaccine was developed for smallpox by Edward Jenner in 1796.

400

What animals are found in the Amazon Rainforest?

A wide variety of animals are found in the Amazon Rainforest, including mammals such as jaguars, monkeys, sloths, tapirs, and giant anteaters. Reptiles such as anacondas, caimans, and boa constrictors also call the rainforest home, as do numerous bird species like macaws, toucans, and parrots. Additionally, there are many amphibians and insects, including colorful poison dart frogs and butterflies. However, due to habitat loss and other threats, many of these species are at risk of extinction.

400

What is currently being debated in the field of philosophy?

The concept of free will is currently being debated by philosophers, with different schools of thought holding varying opinions.

400

When was the internet invented?

The internet was invented in the 1960s

500

How are black holes formed?

Black holes are formed when a massive star collapses under the force of its own gravity, creating a singularity with intense gravitational pull.

500

What is being researched by scientists in the field of quantum mechanics?

The behavior of subatomic particles is currently being researched by scientists in the field of quantum mechanics, with the ultimate goal of developing a comprehensive theory of the universe.

500

When was the Berlin Wall torn down?

The Berlin Wall was torn down on November 9, 1989, by the people of East and West Germany.