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What is the theoretical temperature known as absolute zero, the coldest temperature possible?
A0 degrees Celsius
B-273.15 degrees Celsius
C-100 degrees Celsius
D-500 degrees Celsius
Why is it generally more difficult to walk without slipping on ice compared to walking on regular pavement?
AIce is a poor conductor of heat
BIce is much heavier than pavement
CIce has significantly less friction than pavement
DIce generates static electricity
Common household bleach primarily contains which active chemical compound?
ASodium chloride
BCitric acid
CSodium hypochlorite
DCalcium carbonate
A solar eclipse occurs when which celestial body passes directly between the sun and Earth, blocking sunlight?
AMars
BVenus
CThe moon
DAnother star
What term describes the property of a liquid’s surface that causes it to behave somewhat like a stretched elastic sheet, allowing small insects to walk on water?
AViscosity
BDensity
CBuoyancy
DSurface tension
Alum, a chemical compound long used in traditional water treatment, is primarily added to water for what purpose?
ATo increase the water's temperature
BTo add oxygen to the water
CTo help remove suspended particles and clarify the water
DTo add flavor to drinking water
A lunar eclipse occurs when Earth passes between the sun and the moon, causing what to happen?
AThe moon changes its orbit permanently
BEarth's shadow falls on the moon
CThe moon's shadow falls on Earth
DThe sun disappears entirely
What term describes the ability of a liquid to flow through narrow spaces, such as a thin tube or paper towel, without the assistance of external forces like gravity?
ADiffusion
BCapillary action
CViscosity
DBuoyancy
Silica gel packets, commonly found in packaging for shoes and electronics, serve what purpose?
AThey add a pleasant fragrance
BThey act as a fire retardant
CThey absorb moisture to help keep the contents dry
DThey prevent light from entering the package
What is a primary function of the human lymphatic system?
ADraining excess fluid from tissues and supporting immune defense
BRegulating heart rate
CPumping oxygenated blood to the lungs
DProducing digestive enzymes