Problem:OPTIONS:
- chemical makeup
- cracks
- Sight
- smell
- energy
- color
- look
- cut

Fact 1: Sharpening an object causes that object to change shape. Fact 2: And the shape and look of the family has changed, as well. Given the two facts above, sharpening an object changes its what?
****
A: look

Problem:OPTIONS:
- shivering
- four limbs
- Animal fur
- sleep
- sweating
- hibernation
- cold blood
- fur seals

Fact 1: Mammals can also generate little bursts of heat by shivering. Fact 2: Most mammals can be active even in cold weather because they are warm-blooded. Given the two facts above, which can help warm-blooded animals stay active in cold?
****
A: shivering

Problem:OPTIONS:
- vehicles
- cigarettes
- fossil fuels
- Thunderstorms
- Photosynthesis
- Pesicides
- Tree sap
- mines

Fact 1: Pesticides can cause pollution. Fact 2: Pollution is the release of harmful substances into the environment. Given the two facts above, which of the following can release harmful substances into the environment?
****
A: Pesicides

Problem:OPTIONS:
- outer space
- oceans
- the moon
- islands
- Pacific
- germany
- the sun
- Mountains

Fact 1: Aairplane is used for moving people across bodies of water. Fact 2: An island is land surrounded by water. Given the two facts above, people can be moved where in an airplane?
****
A:
islands