Fact 1: Abalance is used for measuring mass of an object. Fact 2: Mass The base unit of mass is the gram. Given the two facts above, answer the question "what is a balance used for measuring in an object?" with the following options: - density - kinetic - volume - simple - forces - grams - Joules - viscosity
grams

Fact 1: Hearing is used for sensing sound by animals. Fact 2: An ear improves hearing. Given the two facts above, answer the question "What does an ear improve?" with the following options: - activation energy - Relieve pain - Sensing sound - looseness - vision - Sensing wavelengths - nervous system - sight
Sensing sound

Q: Fact 1: Agreenhouse is used to protect plants by keeping them warm. Fact 2: Flowers are the major greenhouse crops. Given the two facts above, answer the question "what are the major crop that needs protecting by keeping them warm" with the following options: - our planet - organisms - Earthworms - Flowers - Echinoids - toughness - support - cellulose
A: Flowers

Question: Fact 1: Feathers help birds fly and provide insulation. Fact 2: Straight feathers are dominant to curly feathers . Given the two facts above, answer the question "a part of birds where what is dominant to curly helps them fly and provides insulation?" with the following options: - Animal fur - bioaerosols - fur and fat - Vanes - Epidermis - sweating - staying warm - straight
Answer: straight

*Question*
Fact 1: Viruses are so small that they can be seen only with an electron microscope. Fact 2: On the surface of each microscopic color filter is also a microscopic lens. Given the two facts above, answer the question "Viruses are so small that to see them a scientist would have to use what kind of lens?" with the following options: - Refract it - refraction of light - an electron lens - an image - rays or beams - bending light rays - A computer - flashlights
**Answer**
an electron lens

*Question*
Fact 1: When an electrical circuit is working properly , electrical current runs through that circuit. Fact 2: An electric current is then used to burn the tumor away. Given the two facts above, answer the question "When the electrical circuit is working properly, what can happen?" with the following options: - dogs can run - heat production - enormous damage to homes - a tumor can be burned away - massive damage - sperm and egg fuse - baskets can be hand-woven - bacteria can thrive
**Answer**
a tumor can be burned away