Across

• 2. When energy comes from these, it doesn't pollute.
• 4. This is an increase in temperature of earth's atmosphere.
• 7. Energy from the sun is called this.
• 8. These are statements made about future events, like forecasts.
• 9. This is a state in which life never ends.

Down

• 1. This describes a simulated or unreal place on a computer.
• 3. This is another way of saying how long wh think will live.
• 5. These are machines with human attributes.
• 6. This is a copy of a computer file for security.