Q: Fact 1: The number of rings in a tree trunk can be used to estimate the age of the tree. Fact 2: Dendrochronologist: A person who studies tree ring growth. Given the two facts above, dendrochronologists do what with regards to tree age?

OPTIONS:
- lie about age
- support
- observe it
- estimate age
- begin age
- focusing a lens
- reinforce age
- genetic diversity

A: estimate age

input: OPTIONS:
- erosion
- Movement
- decrease
- summer end
- imbalanced
- flooding
- watershred
- rivers Now, answer this question: Fact 1: The gravitational pull of the Moon on Earth 's oceans causes the tides. Fact 2: Tides create current. Given the two facts above, if the moon was not present, what would happen to ocean currents?
A:
output: decrease

Fact 1: Algae have varied life cycles. Fact 2: Diatomes are a type of single celled algae. Given the two facts above, what have varied life cycles?

OPTIONS:
- insects
- h2o
- bacteria
- diatomes
- mammals
- days
- gravity
- Most plants

Answer: diatomes

Problem: OPTIONS:
- massive damage
- Heart monitor
- antibodies
- rays or beams
- belt
- cancer
- Pollution
- adding heat
Q: Fact 1: Antigens are found on cancer cells and the cells of transplanted organs. Fact 2: Antibodies immobilize and destroy their specific antigens. Given the two facts above, what can destroy cancer cells?
Answer: antibodies

Problem:OPTIONS:
- closed
- energy
- complete
- vehicles
- engines
- a phone
- buses
- Cars

Fact 1: Powering an electrical device with a battery requires a path for electricity to flow through a closed circuit. Fact 2: Today's cellular phones are second-generation devices. Given the two facts above, powering what with a battery requires a path for electricity to flow?
****
A: a phone

Problem:OPTIONS:
- fighting
- Quality of life
- sound
- Maintain a species
- Most plants
- entropy
- agriculture
- spread flower seeds

Fact 1: Reproduction is the process by which organisms give rise to offspring. Fact 2: Darwin's theory of evolution depends on more offspring than are needed to maintain the species. Given the two facts above, what is reproduction needed for?
****
A:
Maintain a species