Fact 1: Heating an egg causes a chemical reaction in the egg. Fact 2: Heat is very important in cooking. Given the two facts above, what causes a chemical reaction in an egg?

OPTIONS:
- sugar
- the water cycle
- cooking
- birds
- tapeworms
- courtship
- burning
- ovaries

Answer: cooking

Fact 1: Some viruses can cause cancer. Fact 2: Human papillomavirus, or HPV, is the name of a group of viruses. Given the two facts above, what can HPV cause?

OPTIONS:
- a hazard
- harm
- cancer
- sweating
- heightened abilities
- anemia
- good health
- comfort

Answer: cancer

Fact 1: Arthropods are the largest phylum of invertebrates. Fact 2: Insects are the largest group of arthropods. Given the two facts above, what are invertebrates?

OPTIONS:
- fungi
- humans
- insects
- food
- mammals
- gorillas
- barnacles
- animals

Answer: insects

Fact 1: Some birds are pollinators that co-evolved with plants. Fact 2: Hummingbirds are an important groups of bird pollinators. Given the two facts above, what co-evolved with plants?

OPTIONS:
- gravity
- peachleaf willow
- Chemical energy
- Organic compounds
- hummingbirds
- h2o
- density
- animals

Answer:
hummingbirds