Questions with Complete Solutions
What do we call the study of weather and the atmosphere?
Astronomy
Biology
✔✔Meteorology
Ecology
What is the smallest unit of life?
Molecule
Tissue
✔✔Cell
Organ
Which layer of Earth is primarily composed of solid rock?
Outer core
Mantle
✔✔Crust
1
,Inner core
What is the primary gas found in Earth's atmosphere?
Oxygen
Carbon dioxide
✔✔Nitrogen
Argon
Which planet is known as the Red Planet?
Venus
Jupiter
✔✔Mars
Saturn
What type of rock forms from cooled lava or magma?
Sedimentary
Metamorphic
✔✔Igneous
2
,Fossil
What is the boiling point of water at sea level?
50°C
✔✔100°C
150°C
200°C
What organ in the body pumps blood?
Brain
✔✔Heart
Liver
Lungs
What type of simple machine is a seesaw?
Wheel and axle
Pulley
✔✔Lever
3
, Inclined plane
What is the chemical formula for water?
CO2
✔✔H2O
O2
NaCl
What force pulls objects toward Earth?
Magnetism
✔✔Gravity
Friction
Momentum
What is the function of white blood cells?
Carry oxygen
✔✔Fight infections
Aid digestion
4