Fact 1: Most canyons are formed by flowing rivers through erosion over long periods of time. Fact 2: Canyon Lake Canyon lake was formed by dams on the Salt River. Given the two facts above, answer the question "what can form canyons?" with the following options: - spring - storms - dams - mines - salmon - two - rain - cut
dams

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, answer the question "What is reproduction needed for?" with the following options: - fighting - Quality of life - sound - Maintain a species - Most plants - entropy - agriculture - spread flower seeds
Maintain a species

Q: Fact 1: Landfills have a negative impact on the environment. Fact 2: Landfills are the places that our garbage is taken to be buried. Given the two facts above, answer the question "What damages our environment?" with the following options: - Pollution - flooding - harmful substances - Burying garbage - humans disturb it - Planting trees - Recycling - Using renewable energy
A: Burying garbage

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

*Question*
Fact 1: The vanes rotating in an electric fan causes air to move. Fact 2: Air is mostly nitrogen and oxygen. Given the two facts above, answer the question "what moves because of vanes rotating in an electric fan?" with the following options: - nitrogen and oxygen - sun rays - microwaves - some mammals - living things - animals with backbones - kinetic energy - neutrons
**Answer**
nitrogen and oxygen

Q: Fact 1: Oncogenes promote the division of cells with damaged DNA. Fact 2: Oncogenes are genes that promote division. Given the two facts above, answer the question "genes that promote division do so with what?" with the following options: - Most plants - damaged DNA - peachleaf willow - Plants growth - Animal survival - Chemical energy - Change colors - Microscope
A: damaged DNA