Q: Fact 1: Veins generally carry deoxygenated blood. Fact 2: Veins push blood toward the heart. Given the two facts above, what is carried toward the heart?

OPTIONS:
- flow of electrons
- kinetic energy
- deoxygenated blood
- the body's largest organ
- Electrical energy
- energy of moving objects
- refraction of light
- electromagnetic energy

A: deoxygenated blood

Q: Fact 1: Alight bulb is used for seeing in the dark. Fact 2: Light is emitted by a light bulb. Given the two facts above, what is emitted light used for ?

OPTIONS:
- electricity
- To see in the dark.
- activation energy
- heat energy
- kinetic energy
- an electron microscope
- major threat to health
- Electrical energy

A: To see in the dark.

Q: Fact 1: Amphibians have permeable skin that easily absorbs substances from the environment. Fact 2: Amphibian skin lacks hair or scales. Given the two facts above, what do amphibians lack?

OPTIONS:
- brain
- fat
- hair
- power
- oxygen
- lungs
- nectar
- skin

A: hair

Q: Fact 1: Glass cause refraction of light. Fact 2: Refraction Refraction is the bending of light rays. Given the two facts above, what causes the bending of light rays?

OPTIONS:
- darkness
- glass
- lenses
- fibers
- shadows
- voltage
- colors
- a wave

A:
glass