Fact 1: Damming a river can cause a lake to form. Fact 2: Water in the lakes is fresh, cool and transparent. Given the two facts above, answer the question "What is the thing that is created by damming a river made of?" with the following options: - Sediment - Fresh water - loose soil - swamp vegetation - mussels - storing water - body water - carbon dioxide
Fresh water

Fact 1: An automobile engine transforms chemical energy into mechanical energy. Fact 2: Mechanical energy is the sum of Kinetic Energy and Potential Energy. Given the two facts above, answer the question "What works by summing kinetic energy and potential energy?" with the following options: - Riding a bike - transportation technology - adding heat - an automobile engine - circulatory systems - a hydraulic system - Thyroid-stimulating hormone - heterotrophs
an automobile engine

Q: Fact 1: Active immunity results when an immune response to a pathogen produces memory cells. Fact 2: Memory cells persist in the circulation for decades. Given the two facts above, answer the question "what can persist in the circulation for decades?" with the following options: - active immunity - density - Veins and arteries. - oxygen cells - bacteria - chlorofluorocarbons - fur and fat - Chemical energy
A: active immunity

Question: Fact 1: Thick fur can be used for keeping warm. Fact 2: Otters have thick fur coats and whiskers. Given the two facts above, answer the question "otters need their what to keep warm" with the following options: - rocks - fats - Limbs - feet - drift wood - hair - coats - seaweed
Answer: coats

*Question*
Fact 1: Agreenhouse is used to protect plants by keeping them warm. Fact 2: Another well known plant is the Mesquite Bush. Given the two facts above, answer the question "What can a greenhouse protect by keeping warm?" with the following options: - mussels - Species - organisms - lights - bushes - rocks - Oak - hats
**Answer**
bushes

(Q).
Fact 1: An electron microscope is used for seeing very small objects by making them appear bigger. Fact 2: An electron microscope can see many times larger than an optical microscope. Given the two facts above, answer the question "what can make things appear larger?" with the following options: - mutations - deuterostomes - prism - mirror - microscope - glass - goggles - adding heat
(A).
microscope