Fact 1: All chemical reactions require activation energy to get started. Fact 2: Fire is a chemical reaction. Given the two facts above, answer the question "What does fire require to get started?" with the following options: - an engine - activation energy - water - energy usage - direct energy - dogs - activated almonds - adding heat
activation energy

Fact 1: When a river floods , that river deposits soil in flood plains. Fact 2: Soil erosion harms farm and grazing lands and increases flooding and desertification. Given the two facts above, answer the question "When a river floods, that river harms what?" with the following options: - most organisms - Basic units of the plant body. - streams and volcanoes - mountains and lakes - farm and grazing lands - oceans and ponds - swamp vegetation - Plant growth is reduced
farm and grazing lands

Q: Fact 1: Amold spore has a negative impact on the respiratory system. Fact 2: Mildew and mold spores are everywhere. Given the two facts above, answer the question "what can affect the respiratory system?" with the following options: - Pollution - mildew - gas - influenza - oxygen - bacteria - smallpox - gold
A: mildew

Question: Fact 1: Wiring requires an electrical conductor. Fact 2: Ground wire acts as an extra conductor. Given the two facts above, answer the question "what can a ground be used as?" with the following options: - Metling snow - energy - protect them - conductor - support - watershred - storing water - watershed
Answer: conductor

*Question*
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, answer the question "dendrochronologists do what with regards to tree age?" with the following options: - lie about age - support - observe it - estimate age - begin age - focusing a lens - reinforce age - genetic diversity
**Answer**
estimate age

(Q).
Fact 1: Most protists have motility. Fact 2: Protists are the simplest of eukaryotes. Given the two facts above, answer the question "What do simple eukaryotes have?" with the following options: - Energy - fur and fat - Motility - bioaerosols - four limbs - pollen - glucose - Energy.
(A).
Motility