Question

the tank. on other days, the lizard hardly moves at all. james wonders what factors ahow active his lizard is. he has the following supplies available:

• one pet lizard
• live crickets
• live mealworms
• one heating lamp

using only these supplies, which questions can james investigate with an experiment all that apply.

• is the pet lizard more active when it is fed insects or lettuce?
• is the pet lizard more active when its tank is heated with one heating lamp or with two heating lamps?
• is the pet lizard more active when the heating lamp is on for 8 hours or when the heating lamp is on for 12 hours?
• is the pet lizard more active when it is fed crickets or mealworms?

Explanation:

To determine which questions James can investigate, we check if the necessary materials are available:

1. "Is the pet lizard more active when it is fed insects or lettuce?" - James has insects (crickets, mealworms) but no lettuce, so he can't test lettuce. So this question is not investigable.
2. "Is the pet lizard more active when its tank is heated with one heating lamp or with two heating lamps?" - James only has one heating lamp, so he can't test two lamps. This question is not investigable.
3. "Is the pet lizard more active when the heating lamp is on for 8 hours or when the heating lamp is on for 12 hours?" - James can control the heating lamp's on - time (8 vs 12 hours) with the one lamp he has. So this question is investigable.
4. "Is the pet lizard more active when it is fed crickets or mealworms?" - James has both crickets and mealworms, so he can test this. This question is investigable.

Answer:

• Is the pet lizard more active when the heating lamp is on for 8 hours or when the heating lamp is on for 12 hours?
• Is the pet lizard more active when it is fed crickets or mealworms?