Q: Fact 1: Cutting down trees has a negative impact on an ecosystem. Fact 2: When ecosystems are healthy, humankind is healthy. Given the two facts above, cutting down trees has a negative impact on the health of what? | OPTIONS:
- space
- humankind
- mars
- aliens
- salmon
- Species
- humans
- plants
A: humankind

Q: Fact 1: Wings are part of the exoskeleton and attached to the thorax. Fact 2: Behind the head is the thorax. Given the two facts above, wings are part of the exoskeleton and attached where? | OPTIONS:
- insects
- Earth orbiting the Sun
- h2o
- layers of fat
- an organism's body
- tail
- objects that have mass
- behind the head
A: behind the head

Q: Fact 1: Mammals conserve body heat with their hair or fur. Fact 2: All humans are mammals. Given the two facts above, what conserves body heat with their hair? | OPTIONS:
- cats
- bears
- h2o
- clouds
- goats
- humans
- dogs
- trees
A: humans

Q: Fact 1: Storms cause bodies of water to increase amount of water they contain. Fact 2: Rain increases the depth of the lakes. Given the two facts above, what makes a lake's depth greater? | OPTIONS:
- drought
- flooding
- wind
- erosion
- Sediment
- rivers
- storms
- earthquake
A: storms