MidTerm Final Review

Front

What is the arrangement of Earth, the moon, and the sun during a spring tide?

Back

During a spring tide, the Earth, moon, and sun are aligned in a straight line, resulting in higher high tides and lower low tides.

Front

How many sodium atoms are in one molecule of sodium oxide (Na2O)?

Back

There are two sodium atoms in one molecule of sodium oxide.

Front

What does the Hertzsprung-Russell Diagram classify?

Back

The Hertzsprung-Russell Diagram classifies stars based on their luminosity and temperature.

Front

Where are main sequence stars located on the Hertzsprung-Russell Diagram?

Back

Main sequence stars are located in group A, trending from cool, faint stars in the lower right corner to hot, extremely bright stars in the upper left corner.

Front

What does the symbol 'Au' represent on the Periodic Table?

Back

The symbol 'Au' represents gold, indicating it is a pure substance.

Front

What is acceleration in the context of rocket launches?

Back

Acceleration is the rate of change of velocity of the rocket, indicating how quickly it speeds up.

Front

What is a spring tide?

Back

A spring tide is a tide that occurs when the sun, moon, and Earth are aligned, leading to the highest and lowest tides.

Front

What is the significance of the main sequence in stellar evolution?

Back

The main sequence is the longest phase in a star's life cycle where it fuses hydrogen into helium in its core.

Front

What is the difference between a compound and a pure substance?

Back

A compound is made of two or more different elements chemically bonded, while a pure substance consists of only one type of particle.

Front

What is the role of the sun in the Earth-moon-sun system?

Back

The sun's gravitational pull affects the tides on Earth and influences the orbits of the Earth and moon.