Grade 11 Science Assessment No. 1

Front

What protects the Earth from radiation?

Back

Atmosphere

Front

What is the atmosphere?

Back

All the gases around a planet.

Front

What is essential for life as we know it to exist on a planet?

Back

Liquid water.

Front

What happened during the Big Bang?

Back

All of what would become the universe was concentrated in a single small point, or singularity, which rapidly expanded into what is now stars, planets, galaxies, matter, and energy.

Front

How do you test the hardness of a mineral?

Back

Scratch Test.

Front

What is the primary component of the Earth's atmosphere?

Back

Nitrogen (approximately 78%).

Front

What role does the atmosphere play in supporting life?

Back

It provides oxygen for respiration and protects from harmful solar radiation.

Front

What is the significance of liquid water for life?

Back

It is a solvent for biochemical reactions and is essential for all known forms of life.

Front

What is a singularity in the context of the Big Bang?

Back

A point where all matter and energy of the universe was concentrated before the expansion.

Front

What is the difference between a planet and a star?

Back

A planet orbits a star and does not produce its own light, while a star generates energy through nuclear fusion.