Fact 1: Magnetism can cause objects to repel each other. Fact 2: Opposite charges repel. Given the two facts above, what can cause objects to have opposite charges?

OPTIONS:
- Temperature
- frozen water
- heat energy
- magnetism
- polar winds
- ship captains
- voltage
- Light

Answer: magnetism

Fact 1: Fish have a circulatory system with a two-chambered heart. Fact 2: Fish include bass and salmon. Given the two facts above, what has a circulatory system with a two-chambered heart?

OPTIONS:
- sharks
- insects
- salmon
- animals
- barnacles
- mammals
- tortoises
- alpacas

Answer: salmon

Fact 1: Building housing developments usually requires replacing animal habitats. Fact 2: Habitat Martens prime habitat is the coniferous forest. Given the two facts above, what can require replacing the forest home of martens?

OPTIONS:
- biological diversity
- light rains
- light breezes
- reusing materials
- building housing developments
- Plant growth is reduced
- tectonic plates being pushed together
- morning dew

Answer: building housing developments

Fact 1: Molecules of DNA are encoded with instructions that tell cells what to do. Fact 2: Genes, made of DNA, carry the instructions for building proteins. Given the two facts above, what do genes carry?

OPTIONS:
- pollen
- Energy
- calories
- instructions
- Chemical energy
- fat
- acid
- colors

Answer:
instructions