Fact 1: Vertebrates are animals that have a backbone. Fact 2: Invertebrates are animals who lack a backbone or spinal column. Given the two facts above, answer the question "What has a spinal column?" with the following options: - bacteria - humans - vertebrates - lichens - invertebrates - athletes - matter vibrating - people
vertebrates

Fact 1: Aglacier causes mechanical weathering. Fact 2: Largest of the glacier-formed lakes is Karakul. Given the two facts above, answer the question "What can be formed by mechanical weathering?" with the following options: - NaCl - white - rock - tube - soils - Roads - Lakes - sand
Lakes

Q: Fact 1: When the seasons change from the summer to the fall , the amount of daylight will decrease. Fact 2: Daylight is shorter, and the light from the Sun is cooler. Given the two facts above, answer the question "When the seasons change from the summer to the fall, what decreases?" with the following options: - sunlight - rainfall - salinity - Sun light - rain - energy usage - ice - distance
A: Sun light

Question: Fact 1: Producing thrust causes something to move. Fact 2: Airplanes create thrust using propellers, jet engines , or rockets . Given the two facts above, answer the question "Propellers are on some airplanes primarily to give" with the following options: - stability - protection from bird strikes - speed - motion - engine cooling - energy - noise cancellation - power
Answer: motion

*Question*
Fact 1: Arainbow is formed by refraction of light by separating light into all different colors. Fact 2: Rainbows are an optical phenomena due to the diffraction of light waves. Given the two facts above, answer the question "a rainbow is formed by what into all different colors?" with the following options: - movement - diffraction - photons - shaping - focusing a lens - recalling - sunlight - spreading
**Answer**
diffraction

*Question*
Fact 1: Astronauts require preserved food for extended flights. Fact 2: Preservatives are added to extend the shelf life. Given the two facts above, answer the question "What prolongs the storage life of food in space?" with the following options: - hydrogen and oxygen - preservatives - Dehydration - heating liquids - Fuel cells - heat energy - hard outer covering - layers of fat
**Answer**
preservatives