Stars Like the Sun. When the core runs out of hydrogen fuel, it will contract under the weight of gravity. ... The upper layers will expand and eject material that will collect around the dying star to form a planetary nebula. Finally, the core will cool into a white dwarf and then eventually into a black dwarf.
The correct answers are:
• that dark matter exists
The existence of dark matter (invisible matter) is generally accepted and it is believed that this matter is about 85% of the total matter in the universe and it is composed of undiscovered subatomic particles.
• that invisible matter must be influencing the rotation of galaxies
Dark matter is crucial for explaining why galaxies can spin without tearing themselves apart.
The answer is either A or C
Answer:
Be a conscientious and informed consumer. ... Encourage companies to take steps to prevent human trafficking in their supply chains and publish the information, including supplier or factory lists, for consumer awareness. Volunteer and support anti-trafficking efforts in your community.
