Investigating the Universe

Why do all the planets orbit the Sun?

• The nuclear fusion exerts a large amount of heat and light.

• The sun is the largest star in our solar system.

• The sun is very massive and has a lot of gravity.

What role does gravity play in our universe?

• Gravity holds together solar systems.

• Gravity takes place in stars and releases a lot of energy.

• Gravity is the result of nuclear fusion in which Hydrogen and Helium atoms join.

Order these from largest to smallest.

• Universe, Solar System, Galaxy, Star

• Solar System, Galaxy, Universe ,Star

• Star, Solar System, Galaxy, Universe

• Universe, Galaxy, Solar System, Star

Which stars are the brightest?

• The larger the number the greater the brightness.

• Stars with a negative magnitude

• Stars that have a magnitude greater than 0.

What would you expect to find in an elliptical galaxy?

• Large amounts of gas

• Large amounts of gas and dust

• Primarily old stars

• Primarily young stars

Blue color stars are usually:

• the hottest

• the coolest

• medium temperature

What is likely to be the fate of a high-mass star?

• White dwarf

• Black hole

• Black dwarf

• Red Giant

What would you not find much of in an elliptical galaxy?

• old stars

• red stars

• gas and dust

The Big Bang theory explains...

• how the universe began

• why the universe was created

• how life evolved

• the forces of gravity

The universe is still expanding. True or False.

• True

• False