An automobile engine transforms chemical energy into mechanical energy, and engines convert some energy of it to move the pistons (to work). Given these facts, what is moved by mechanical energy in an automobile among the following options: - vehicles - brake pad - humans - animals - people - gas pedal - pistons - seatbelt
pistons

Chemical weathering causes iron in rock to oxidize, and iron oxide gives a rusty red color to sedimentary rocks. Given these facts, what gives a rusty red color to sedimentary rocks among the following options: - food coloring - The area was once underwater - chemical weathering - remains of prehistoric life - deoxyribonucleic acid - sea urchins - dirt - earthquakes
chemical weathering

Q: Skin is used for breathing air by frogs, and some bats eat meat and fish and frogs. Given these facts, what eats something that uses skin for breathing air among the following options: - Amoebas - animal - Honeybees - birds - tigers - Bats - humans - Ants
A: Bats

Question: If an object reflects light toward the eye then that object can be seen, and mirrors reflect light. Given these facts, what do mirrors do among the following options: - converting electricity to heat - prevent heat loss - duplicate itself - reflect air molecules - infrared light - It gets more light - invisible objects - reflect objectstowards the eye
Answer: reflect objectstowards the eye

*Question*
Chordates have a complete digestive system and a closed circulatory system, and because reptiles are vertebrates, they are chordates. Given these facts, vertebrates have a complete digestive system and a closed what among the following options: - digestive tract - lung system - the body's largest organ - circulatory system - Veins and arteries. - brain stem - all liquids - major threat to health
**Answer**
circulatory system

(Question)
Amirror is used for reflecting light, and light enters the camera through the lens and is reflected upward by the mirror to the ground glass. Given these facts, what redirects light in a camera among the following options: - cactuses - microscope - photons - electricity - The shutter - A mirror - A photo - The film
(Answer)
A mirror