Fact 1: Viruses are so small that they can be seen only with an electron microscope. Fact 2: Viruses Viruses are very small, a few nanometers in size. Given the two facts above, objects that are a few nanometers in size can be seen only with:?
OPTIONS:
- an electron microscope
- refraction of light
- matter vibrating
- ultrasound
- The bending of a ray of light
- slight magnification
- flashlights
- lens
an electron microscope

Fact 1: Aprism is used for refracting light. Fact 2: Refraction is the bending of light cause by a speed change when it passes through different media. Given the two facts above, what aspect of light changes when it passes from air into a prism?
OPTIONS:
- power
- seasons
- speed
- energy
- a wave
- Joules
- heat
- unique

Answer: speed

Question: Fact 1: Gene flow occurs when individuals move into or out of a population. Fact 2: Gene flow increases genetic variation within a population. Given the two facts above, what increases genetic variation?
OPTIONS:
- selection
- similiarity
- colors of the spectrum
- Plant reproduction
- biological diversity
- natural disasters
- population movement
- rapid expansion
Answer: population movement

input with options: Fact 1: If an object in a fluid is more dense than that fluid then that object will sink in that fluid because of gravity. Fact 2: An object is buoyant when it is less dense than the fluid around it. Given the two facts above, what decreases when the density of an object increases?
OPTIONS:
- support
- heat
- forces
- air cools
- heat energy
- buoyancy
- Pollution
- dry and hot
output: buoyancy

Q: Fact 1: Earthworm burrows help aerate soil, which is also good for plants. Fact 2: Earthworms crawl through the soil, eating sediments or dirt directly. Given the two facts above, earthworms eat dirt, which is good for what?

OPTIONS:
- bees
- plants
- water
- health
- firs
- survival
- food
- movement

A: plants

Fact 1: Centrioles are organelles involved in cell division. Fact 2: Basal bodies function as centrioles. Given the two facts above, basal bodies function as organelles involved in what?
OPTIONS:
- Plants growth
- root growth
- to move people
- permineralization
- cell division
- Veins and arteries.
- movement
- Plant reproduction
cell division