Question:
Goal: How do you make an ice pack?

Which of the following methods is more reasonable for accomplishing this goal?

OPTIONS:
- Fill the paper freezer bag with 1 cup of rubbing alcohol and 2 cups of water. Try to get as much air out of the freezer bag before sealing it shut. Place the bag and its contents inside a second freezer bag to contain any leakage. Leave the bag in the freezer for at least an hour.
- Fill the plastic freezer bag with 1 cup of rubbing alcohol and 2 cups of water. Try to get as much air out of the freezer bag before sealing it shut. Place the bag and its contents inside a second freezer bag to contain any leakage. Leave the bag in the freezer for at least an hour.
Answer:
Fill the plastic freezer bag with 1 cup of rubbing alcohol and 2 cups of water. Try to get as much air out of the freezer bag before sealing it shut. Place the bag and its contents inside a second freezer bag to contain any leakage. Leave the bag in the freezer for at least an hour.

Question:
Goal: How do you hang a sign?

Which of the following methods is more reasonable for accomplishing this goal?

OPTIONS:
- Take your piece of wood and tape it to the wall.
- Take your piece of wood and nail it to the wall.
Answer:
Take your piece of wood and nail it to the wall.

Question:
Goal: How do I make block of wood feel smooth?

Which of the following methods is more reasonable for accomplishing this goal?

OPTIONS:
- Use a piece of sandpaper and rub the smooth side against the wood.
- Use a piece of sandpaper and rub the rough side against the wood.
Answer:
Use a piece of sandpaper and rub the rough side against the wood.