What are the three main particles that make up an atom?

Protons, neutrons, and electrons.

Fill in the blank: The positive charge of protons and the negative charge of electrons create an ______ that holds the atom together.

Attraction

True or False: The plum pudding model suggested that electrons are embedded in a dense nucleus.

False. The plum pudding model proposed that electrons were scattered throughout a 'soup' of positive charge, not embedded in a nucleus.

Which scientist confirmed the existence of neutrons in 1932?

James Chadwick

Riddle: I am made of one type of atom, like pure gold, but if I mix with others, I lose my purity. What am I?

A pure element

What percentage of sodium chloride is found in seawater?

68%

Fill in the blank: The conditions of the atmosphere at a specific moment are referred to as ______.

Weather

True or False: Climate refers to short-term atmospheric conditions.

False. Climate refers to the long-term average of atmospheric conditions over about 30 years.

What are the main climate zones on Earth?

Polar, temperate, arid, tropical, Mediterranean, mountains/tundra/taiga.

Riddle: I am a layer of gas around Earth, formed from volcanic activity and evolving microorganisms. What am I?

The atmosphere

Fill in the blank: The formula to calculate the purity percentage is (Parts of gold / Total parts) × ______.

100

Which gas was primarily released by early volcanic activity and contributed to the formation of the early atmosphere?

Carbon dioxide

True or False: The levels of oxygen in the atmosphere have decreased since the appearance of microorganisms.

False. The levels of oxygen have increased due to the photosynthesis of microorganisms and plants.

What is the primary human activity that has contributed to the increase in carbon dioxide levels in the atmosphere in recent times?

Burning fossil fuels

Fill in the blank: The process by which scientists review each other's work to ensure accuracy is known as ______.

Peer review