If vertebrates have a spinal column, then what has a spinal column? Answer choices: - bacteria - humans - vertebrates - lichens - invertebrates - athletes - matter vibrating - people
vertebrates

If lakes can be formed by mechanical weathering, then what can be formed by mechanical weathering? Answer choices: - NaCl - white - rock - tube - soils - Roads - Lakes - sand
Lakes

Q: If when the seasons change from the summer to the fall , the amount of light from the Sun will decrease, then when the seasons change from the summer to the fall, what decreases? Answer choices: - sunlight - rainfall - salinity - Sun light - rain - energy usage - ice - distance
A: Sun light

Question: If some airplanes use propellers to move, then propellers are on some airplanes primarily to give? Answer choices: - stability - protection from bird strikes - speed - motion - engine cooling - energy - noise cancellation - power
Answer: motion

*Question*
If arainbow is formed by diffraction into all different colors, then arainbow is formed by what into all different colors? Answer choices: - movement - diffraction - photons - shaping - focusing a lens - recalling - sunlight - spreading
**Answer**
diffraction

*Question*
If preservatives are added to food to prolong it's shelf life, then what prolongs the storage life of food in space? Answer choices: - hydrogen and oxygen - preservatives - Dehydration - heating liquids - Fuel cells - heat energy - hard outer covering - layers of fat
**Answer**
preservatives