3. draw conclusions: what would life on earth be like without the sun?

Brief Explanations:

The Sun is crucial for life on Earth. It provides light for photosynthesis, which is the basis of the food - chain. It also provides heat, maintaining Earth's temperature within a range suitable for life. Without the Sun, photosynthesis would stop, plants would die, and the food - chain would collapse. The Earth would also rapidly cool down to extremely low temperatures, making it inhospitable for most life forms.

Answer:

Life on Earth would not be possible as we know it. Without the Sun, photosynthesis would cease, leading to the death of plants and the collapse of the food - chain. The Earth would also become extremely cold, making it uninhabitable for most organisms.