Fact 1: Most canyons are formed by flowing rivers through erosion over long periods of time. Fact 2: Erosion was monitored by means of erosion pins. Given the two facts above, answer the question "How do we track canyon changes?" with the following options: - LEDs - wind - forces - river - slow - Pins - Raft - three
Pins

Fact 1: Some light bulbs convert electricity into light and heat energy. Fact 2: Halogen light bulbs generate heat. Given the two facts above, answer the question "How do halogen bulbs make heat?" with the following options: - Air - energy - kinetic energy - Water - Sunlight - Evaporation - simple - Electricty
Electricty

Q: Fact 1: Coal is used to produce electricity by burning in coal-fire power stations. Fact 2: Electricity is a form of energy. Given the two facts above, answer the question "What does burning coal in coal-fired power plants produce?" with the following options: - Decibels - Fireplaces. - engines - organisms - Aloe plants. - Banana plants. - Energy. - warmth
A: Energy.

Question: Fact 1: Flatworms belong to the phylum Platyhelminthes. Fact 2: Flatworms are bilaterally symmetric. Given the two facts above, answer the question "What is true about the phylum Platyhelminthes?" with the following options: - a hemisphere is tilted away from the sun - biological diversity - they have bilateral symmetry - characteristics - Something with a head, thorax, and abdomen - sub-units of species - aerobic capacity - The number of individuals
Answer: they have bilateral symmetry

*Question*
Fact 1: Hearing is used for sensing sound by animals. Fact 2: All cats are animals. Given the two facts above, answer the question "what uses hearing to sense sound?" with the following options: - humans - Whales - cats - dogs - bears - vibrations - plants - planets
**Answer**
cats

Q: Fact 1: Cooking food requires adding heat energy. Fact 2: Many of foods that humans eat are cooked, recooked, and then warmed up. Given the two facts above, answer the question "What do humans add to their food?" with the following options: - nutrients - Proteins - Greenhouse gases - pain - gasoline - Heat energy - Energy. - coal
A: Heat energy