Biology
Physics
Chemistry
Earth Science
Astronomy
100

What is the largest organ in the human body?

The Skin

100

What is the force that pulls objects towards the center of the Earth?

Gravity

100

What is the symbol for the element hydrogen?

H

100

What is the outermost layer of the Earth called?

The crust

100

What is the closest celestial body to Earth? 

The moon

200

What is the powerhouse of the cell called?

Mitochondria

200

What is the unit of measurement for force?

Newtons

200

What is the process called when a liquid turns into a gas?

Evaporation 

200

What is the study of Earth’s atmosphere and weather called?

Meteorology 

200

What is the largest planet in our solar system?

Jupiter

300

What is the pigment that gives plants their green color and helps them with photosynthesis?

Chlorophyll 

300

What is the unit of measurement for speed?

Meters per second (m/s)

300

What is the smallest unit of matter called?

An atom

300

What is the study of earthquakes called?

Seismology

300

What is the name of the galaxy that contains our solar system?

Milky Way

400

What is the hard outer covering on insects called?

Exoskeleton 

400

What is the force that resists motion when two objects rub against each other?

Friction

400

What is the process called when a solid turns directly into a gas without becoming a liquid first?

Sublimation

400

What is the name of the layer of the atmosphere where weather occurs?

The troposphere.

400

How many planets are there in our solar system?

Eight

500

What is the process called when a plant loses water through its leaves?

Transpiration 

500

What is the force that opposes the motion of an object through a fluid, such as air or water?

Drag

500

What is the formula for table salt (sodium chloride)?

NaCl

500

True or False: Earth’s seasons are caused by its elliptical orbit around the Sun.

False: Seasons are caused by the tilt of Earth on its axis.

500

Which planet has the most moons?

Jupiter